Dissertations / Theses on the topic 'Muscle oxygenation'
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Ahmadi, Sirous. "Monitoring muscle oxygenation and myoelectric activity after damage-inducing exercise." Thesis, The University of Sydney, 2007. http://hdl.handle.net/2123/2240.
Full textAhmadi, Sirous. "Monitoring muscle oxygenation and myoelectric activity after damage-inducing exercise." University of Sydney, 2007. http://hdl.handle.net/2123/2240.
Full textIn this thesis, three experiments were conducted to monitor: (i) muscle oxygenation and electromyographic activity of the biceps brachii after exercise-induced muscle damage (ii) muscle oxygenation after downhill walking-induced muscle damage, and, (iii) muscle oxygenation following a bout of vigorous concentric exercise. Maximal eccentric exercise (EE) of biceps brachii resulted in significantly increased mean resting oxygen saturation and decreased deoxyhaemoglobin. During isometric contractions at 50% and 80% of subjects’ maximum voluntary torque (MVT), oxygen desaturation and resaturation kinetics and volume were significantly decreased after EE, and these declines were significantly prevalent over the following 6 days. Additionally, a significant shift in median frequency intercept (measured by electromyography; EMG) towards lower frequencies was observed during isometric contractions at both 50% and 80% MVT after EE in the exercised arm. After an exhaustive session of downhill walking, another form of EE, resting total haemoglobin and oxyhaemoglobin decreased. Furthermore, during isometric contractions at 30%, 50% and 80% of MVT, prolonged and significant increases were observed in oxygen desaturation and resaturation kinetics and volumes after ambulatory EE. In contrast to the two EE experiments, concentric contractions did not evoke any prolonged changes in muscle oxygenation. Collectively, the findings of this thesis revealed significant and prolonged changes in muscle oxygenation at rest and during exercise, following sessions of strenuous eccentric exercise. Although not clear, the possible mechanism responsible for the changes in muscle oxygenation after EE could be increased resting muscle oxygen utilization due to probable muscle damage and a subsequent requirement of energy demanding repair processes. Concentric exercise resulted in fatigue, but it did not affect muscle oxygenation. Although a prolonged reduction in EMG median frequency intercept was observed after EE, this was not closely time-associated with the biochemical, anthropometric or functional markers of muscle damage.
Vallet, Benoît. "Reactivite vasculaire et oxygenation tissulaire." Lille 2, 1994. http://www.theses.fr/1994LIL2P265.
Full textHernández, Andrés Gladden L. Bruce. "Muscle oxygenation does not affect the prior exercise effect." Auburn, Ala., 2009. http://hdl.handle.net/10415/1837.
Full textUfland, Pierre. "Muscle oxygenation and capacity to repeat high-intensity exercises." Amiens, 2012. http://www.theses.fr/2012AMIE0018.
Full textIl est généralement accepté qu'une plus grande capacité de consommation d'O2 musculaire est associée à une meilleure performance aérobie. A l'inverse, une faible capacité de consommation d'O2 musculaire est également associée à une récupération inter-effort réduite/ralentie. A la fin des années 80, le suivi non invasif de l'oxygénation musculaire (mO2), déduite par la mesure de l'hémoglobine ([Hb]) / myoglobine ([Mb]) saturé en oxygène (O2) et de l'[Hb]/[Mb] dépourvu d'O2, a émergé dans de nombreuses études avec l'inclusion de la spectroscopie du proche infrarouge (NIRS). Le fait que la NIRS soit devenue portable rend libre l'évaluation continue de la balance entre apport d'O2 aux muscles en action et consommation musculaire d'O2 des lits capillaires du muscle considéré. Dans cette thèse, nous nous sommes attachés à examiner les considérations méthodologiques de l'utilisation de la NIRS pour évaluer mO2 et consommation d’oxygène musculaire (mVO2) (Etudes 1 et 2). Les études 2, 4 et 5 ont étudié les relations éventuelles qui peuvent exister entre la mO2 et la performance lors d'exercices répétés à haute intensité. Initialement nous avons étudié la reproductibilité et la sensibilité de mO2 post-exercice (Etude 1). Un niveau modéré de reproductibilité, ainsi qu'une indépendance des relevés en fonction de l'intensité d'exercice lors de la récupération sans occlusion ont été constatés. Par contre, lorsque la récupération de la mVO2 était observée, il fut relevé que les mesures étaient, certes modérément reproductibles à l’instar de mO2 post-exercice mais à contrario dépendantes de l'intensité d'exercice. Dans une étude subséquente (Etude 2), nous avons inspecté l'influence des changements de direction (COD) sur la mVO2. Nous avons ainsi observé une plus grande mVO2 avec COD : pour des vitesses similaires absolues de course, les courses en navette sur 20 m étaient associées à de plus grandes mVO2 que lors des courses en ligne droite. Ces résultats suggéraient que mVO2 déjà sensible à l’intensité de l’exercice, l’était aussi à la modalité de course (avec ou sans COD). En second lieu, le rôle de la mO2 sur le paramètre de récupération de force musculaire durant des efforts maximaux répétés a été examiné (Etude 3). Les résultats ont confirmé que la récupération de mO2 peut jouer un rôle modéré dans la production de force maximale. Suite à cette étude, nous avons souhaité évaluer l'influence du type d'entraînement sur la récupération de mVO2 (Etude 4). Ainsi, la comparaison entre entraînement en endurance et entraînement au sprint révèle une meilleure récupération de mVO2 dans le groupe endurance. Cette accélération de la récupération de mVO2 était liée à une meilleure capacité à répéter des sprints. L’entraînement agit donc sur le paramètre de récupération de mV2. En dernière partie, nous avons inspecté dans une étude longitudinale (Etude 5) les effets d’une période d'entraînement aérobie sur la mO2 post-sprints. L'amélioration de la capacité à répéter des sprints a été associée à l'accélération de la mO2 post-sprints, ce qui confirme que la fonction musculaire aérobie pourrait jouer un rôle au niveau dans la récupération métabolique entre les sprints
Ferreira, Leonardo Franklin. "Dynamics of muscle blood flow, O[subscript2] uptake and muscle microvascular oxygenation during exercise." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/201.
Full textDias, Wilson Vinicius. "Adaptations du métabolisme musculaire en réponse à l’exercice et à une supplémentation en antioxydants chez des patients atteints de Dystrophie Fascioscapulohumérale." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTT030.
Full textFacioscapulohumeral muscular dystrophy (FSHD), first described in 1885 by Landouzy Dejerine, is the most common inherited skeletal muscle disease of adult life affecting 4000 to 5000 persons in France. Progressive evolution of the disease leads to progressive weakness and atrophy of muscle fibers associated to a wide variability. The pattern of muscle weakness is often asymmetrical and the rate and extent of progression may vary considerably with sudden periods of unexplained rapid disease progression. This muscle disorder is characterized by progressive muscle weakness, beginning with facial muscles and the shoulder girdle, followed by the pelvic girdle and the muscles of the lower extremities. In 10 to 15% of cases, patients need to use a wheelchair. Despite major progress in the understanding of the genetic basis of FSHD, the exact mechanisms that lead to FSHD defects are not completely understood and no curative treatment is available. However, there is growing evidence that oxidative stress may contribute to FSHD pathology. The hypothesis that oxidative stress responses might be specifically altered in FSHD is supported by the deregulation of enzymes involved in oxidative stress.A prospective study realized with FSHD patients and healthy subjects unrevealed the correlation between systemic and muscular oxidative stress and functional muscle defects. Based on these data, we organized a randomized, double-blind, placebo-controlled pilot clinical trial in order to evaluate the effects of 17 weeks antioxidant supplementation in 54 FSHD patients. This clinical trial demonstrates a significant increase in muscle force and quadriceps endurance correlated to a decrease in oxidative stress and an increase in antioxidant defense in FSHD patientsFurthermore, many FSHD features may be caused or exacerbated by perturbations in the production of free radicals or inappropriate response to such stressors. Therefore the first objective was planned to investigate muscle oxygenation patterns during and after a MVCQ by near-infrared diffuse optical spectroscopy (NIRS). The second objective is to evaluate the effect of antioxidant supplementation on quadriceps volumes by IRM and determine the muscle quality using Strength/ Volume ratio of quadriceps muscles and correlate this variables with force and oxidative stress parameters.The major findings of this study show a significant decrease in oxidative capacity during voluntary isometric contraction in quadriceps and demonstrate the effect of supplementation on muscle volume and quality. Indeed, vitamin E, vitamin C, zinc and selenium supplementation improves muscle volume and quality of both quadriceps by enhancing the antioxidant defences and reducing oxidative stress.This increase are associated to increase in strength and decrease in oxidative stress and increase in antioxidant defences. Taken together, we show that oxidative stress plays an important role in FSHD and that an anti-oxidant strategy adapted to the FSHD-specific “oxidative stress” may be a relevant therapeutic approach for these patients. Further analyses of ROS production and sources could contribute to a better understanding of the pathophysiological mechanisms implicated in FSHD
Greenbaum, Adam Raphael. "A microelectrode study of skeletal muscle oxygenation and perfusion during rest and electrical stimulation." Thesis, Imperial College London, 1995. http://hdl.handle.net/10044/1/7744.
Full textGermain, Geneviève. "Effect of hyperbaric oxygen therapy on exercise-induced muscle injury." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29504.
Full textDascombe, Benjamin James, and b. dascombe@cqu edu au. "Pulmonary Oxygen Uptake and Muscle Oxygenation Responses to Exercise in Well-Trained Young and Middle-Aged Cyclists." Central Queensland University. Department of Health and Human Performance, 2007. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20070719.105750.
Full textWaltz, Xavier. "Rhéologie sanguine, microcirculation, oxygénation tissulaire et hypoxémie, au repos et à l'exercice, chez les patients atteints de la drépanocytose." Thesis, Antilles-Guyane, 2012. http://www.theses.fr/2012AGUY0563/document.
Full textSickle cell anemia is a hemoglobinopathy forms and severities very heterogeneous clinical affecting many organs in affected patients. For this reason the term major sickle cell syndrome is generally used. All major sickle cell syndromes have a common point mutation in the gene called β-globin mutation βs. This βs mutation leads to the synthesis of the protein hemoglobin S (HbS) is characterized by its ability to polymerize in its deoxygenated form. The polymerization of HbS is the trigger for the sickling of red blood cells and leads to many Hematological and hemorheological. These are at the origin of disorders hemodynamics, blood oxygenation and tissue perfusion with oxygen. This results in many acute complications (vaso-occlusive crisis, stroke, acute chest syndrome, etc..) And / or chronic (glomerulopathy, osteonecrosis of the femoral head etc.). Caused by a defect of tissue oxygenation
Barron, David James. "Muscle transformation of cardiomyoplasty : perfusion, oxygenation and conditioning of the Latissimus dorsi." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272203.
Full textMuthalib, Makii. "Effects of muscle contractions on biceps brachii oxygenation investigated by near-infrared spectroscopy." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2010. https://ro.ecu.edu.au/theses/1894.
Full textBasoudan, Nada. "Respiratory muscle oxygenation and myoelectrical manifestations during normoxic and hypoxic inspiratory threshold loading." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/56672.
Full textGrobler, Lara. "The effect of graduated compression socks on calf muscle oxygenation of endurance athletes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71677.
Full textENGLISH ABSTRACT: Compression socks (CS) are used as an ergogenic aid during and after exercise by many athletes of elite and recreational status. The exact mechanism whereby CS affect performance and postexercise recovery is not yet elucidated. Some research ascribes the beneficial effects to improved lactate removal rates with CS. One hypothesis is that CS improve venous return and thereby remove the lactate from the tissue to other tissues such as the liver, and the second hypothesis is that the CS cause retention of the lactate within the muscle and therefore improve the oxidation of the lactate within the muscle (Berry & McMurray, 1987). The current study endeavoured to test the hypothesis set by Berry and McMurray (1987) by measuring the effect of CS as well as flight socks (FS) on muscle oxygenation during exercise and recovery in endurance trained runners and triathletes. Eleven male endurance trained runners and triathletes (age = 34.8 ± 3.8 years, VO2max = 52.4 ± 7.1 mL.kg-1.min-1) participated in the study. They completed an incremental exercise test to exhaustion to determine their maximal aerobic capacity (VO2max) and peak treadmill velocity (PTV). Then they completed two 10 km treadmill running tests at 80 % of their PTV. During these two trials participants wore either CS or FS; the order of treatment was randomly selected. A subset of the study sample (n = 5) also completed a control test wearing only their ankle length sport socks (NS). After these trials, participants completed a 60 minute passive recovery period in the seated position while muscle oxygenation was measured. Compression under the socks was measured at several anatomically determined measurement points prior to the commencement of the exercise test, along with the determination of blood haemoglobin concentration ([Hb]). During the exercise trials, blood lactate concentration ([BLa]), skin temperature (ST),oxygen consumption (VO2), carbon dioxide production (VCO2), heart rate (HR), and muscle oxygenation variables (oxy-haemoglobin (O2Hb), deoxy-haemoglobin (HHb), tissue oxygenation index (TOI) and total haemoglobin index (nTHI)) was measured . During the 60minute passive recovery period, [BLa], ST, O2Hb, HHb, TOI, and nTHI measurements were continued. The results showed that there were differences in the pressure exerted between the two pressure condition (CS and FS) at the posterior ankle, and under the elastic of the sock as well as on the anterior calf at the level of greatest calf circumference. Differences in ST between the CS and NS and the FS and NS conditions were found between the first four 2 km intervals of the exercise protocol, but not during recovery. No differences were found in [BLa] between the three different compression conditions during either the exercise (p = 0.19) or recovery period (p = 0.63), as well as no differences in the cardiorespiratory variables during exercise between the three different compression conditions (VO2, p = 0.06; VCO2, p = 0.12; HR, p = 0.36). With regard to the muscle oxygenation variables, no differences were found between the three compression conditions during exercise, however there was a trend for lower oxygen utilization (HHb) during exercise in the NS condition (p = 0.57, medium to large practical significance). There were also no differences in these variables (O2Hb, p = 0.65; HHb, p = 0.57; TOI, p = 0.39; nTHI, p = 0.22) during recovery, although oxygen utilization (HHb) showed a faster recovery rate with increasing external pressure. From the results obtained, it seems that external compression caused a decrease in the blood flow velocity within the muscle, thereby increasing oxygen diffusion rate. During exercise this did not facilitate differences in [BLa], however, after the first 10 minutes of the recovery period, large practical differences were found between the NS and both sock conditions, suggesting that the increase in oxygen diffusion improved lactate clearance. This could support the hypothesis set by Berry and McMurray (1987).
AFRIKAANSE OPSOMMING: Kompressie sokkies (CS) word gereeld deur beide rekreasie- en elite atlete gebruik as ‘n ergogeniese hulpmiddlel tydens oefening en herstel. Die presiese meganisme waardeur CS prestasie en post-oefening herstel beïnvloed is nog nie volledig verklaar nie. Sommige navorsing skryf die voordelige effekte toe aan die vinniger herstel van laktaat in die sirkulasie. Daar is tans twee hipoteses vir die meganisme waardeur CS laktaat verwydering verbeter. Die eerste hipotese is dat CS die veneuse terugvoer verbeter en daardeur die laktaat van die weefsel verwyder en na ander weefsels soos die lewer vervoer vir verwydering. Die tweede hipotese is dat CS veroorsaak dat die laktaat in die spierweefsel teruggehou word wat dan tot gevolg het dat die laktaat in die spier self deur middel van oksidasie verwyder word (Berry & McMurray, 1987). Hierdie studie poog om Berry en McMurray (1987) se hipotese te toets deur die effek wat CS sowel as vlugsokkies (FS) op spieroksigenasie het gedurende oefening en herstel in geoefende uithouvermoë hardlopers en driekamp atlete vas te stel. Elf ingeoefende langafstand hardlopers en driekampatlete (mans) (ouderdom = 34.8 ± 3.8 jaar; VO2maks = 52.4 ± 7.1 mL.kg-1.min-1) het aan hierdie studie deel geneem. Die deelnemers het ‘n inkrementele toets tot die punt van uitputting voltooi om hul maksimale aërobiese kapasiteit (VO2maks) en piek trapmeul snelheid (PTV) vas te stel. Die elf deelnemers het ook twee 10 km hardlooptoetse teen 80 % van hul PTV voltooi. Gedurende hierdie twee toetse het die deelnemers óf CS óf FS gedra; die volgorde van die intervensie was lukraak aan hulle toegeken. ‘n Subgroep van die steekproef (n = 5) het ook ‘n kontrole toets voltooi waartydens hulle hul eie enkelhoogte sport sokkies (NS) gedra het. Aan die einde van die hardloop protokol het die deelnemers ‘n 60 minuut passiewe herstel periode in die sittende posisie voltooi terwyl spieroksigenasie gemeet is. Kompressie onder die sokkies is voor die aanvang van die hardloop protokol by verskeie anatomies gedefinieerde punte gemeet. Verder was die bloed hemoglobien konsentrasie ([Hb]) ook gemeet voor die hardloop protokol. Tydens die oefeningtoets is bloedlaktaat konsentrasie ([Hb]), veltemperatuur (ST), suurstof verbruik (VO2), koolstofdioksied produksie (VCO2), harttempo (HR), sowel as spieroksigenasie veranderlikes (oksi-hemoglobien (O2Hb), deoksi-hemoglobien (HHb), weefsel oksigenasie indeks (TOI), en totale hemoglobien indeks (nTHI)) gemeet. Gedurende die 60 minuut passiewe hersteltydperk is [BLa], ST, O2Hb, HHb, TOI en nTHI metings geneem. Die resultate toon dat daar ‘n verskil is in die druk wat uitgeoefen word in die onderskeie druktoestande (CS en FS) op die been by die posterior enkel en onder die rek van die sokkie, sowel as op die anterior kuit waar die kuit die grootste omtrek het. Verdere verskille tussen die CS en NS en die FS en NS toestande is in ST gevind in the eerste vier 2 km intervalle van die oefeningtoets, alhoewel geen verskille tydens die herstelperiode gevind is nie. Tydens beide die oefening (p = 0.19) en herstel (p = 0.63) protokol is geen verskille tussen die drie kompressie toestande met betrekking tot [BLa] gevind nie. En so ook is daar geen verskille tussen die onderskeie kompressie toestande in kardiorespiratoriese veranderlikes (VO2, p = 0.06; VCO2, p = 0.12; HR, p = 0.36) tydens oefening gevind nie. Met betrekking tot spieroksigenasie veranderlikes was daar geen verskil gevind tussen die drie kompressietoestande gedurende oefening nie, alhoewel daar ‘n tendens was vir die NS toestand om tydens oefening minder suurstofverbruik (HHb) (p = 0.57, medium tot groot praktiese effek) te lewer. So ook gedurende herstel is daar geen verskil in hierdie veranderlikes (O2Hb, p = 0.65; HHb, p = 0.57; TOI, p = 0.39; nTHI, p = 0.22) gevind nie, alhoewel die suurstofverbruik (HHb) vinniger na die basislyn herstel het met ‘n toename in druk. Die resultate toon dat eksterne kompressie ‘n afname in die bloedvloei tempo in die spier veroorsaak wat dan ‘n verlengde suurstof diffusie tyd veroorsaak. Hierdie verlengde suurstof diffusie tyd het geen effek op [BLa] tydens oefening gehad nie, alhoewel daar na die eerste 10 minute van die herstelperiode ‘n groot praktiese verskil tussen die NS en sokkie toestande gevind was in [BLa]. Hierdie verskil kan daarop dui dat die toename in suurstof diffusie verbeterde laktaat verwydering tot gevolg het, wat dan die hipotese van Berry en McMurray (1987) ondersteun.
Kruse, Nicholas T. "Blood Flow and Oxygenation Dynamics as a Result of Human Skeletal Muscle Stretching." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1430471839.
Full textDiMenna, Fred J. "The influence of muscle fibre recruitment on VO2 kinetics." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/106719.
Full textKowalsky, Jennifer M. "Variation in Cerebral Oxygenation during Whole Blood Donation: The Impact of Applied Muscle Tension." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1306864597.
Full textCraig, Jesse Charles. "Effect of beetroot supplementation on conduit artery blood flow and muscle oxygenation during handgrip exercise." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/19093.
Full textDepartment of Kinesiology
Thomas J. Barstow
Dietary nitrate supplementation via beetroot juice (BR) has been shown to have positive effects on mitochondrial and muscle efficiency during large muscle mass exercise in humans, and more recently on locomotory muscle blood flow [Q-dot] in rats. To date, an integrated measure of these effects has not been performed in humans. Therefore, we assessed the influence of BR on [Q-dot] and muscle oxygenation characteristics during moderate and severe intensity handgrip exercise. Seven healthy men (age: 25 ± 3 yrs; height: 179 ± 4 cm; weight: 82 ± 9 kg) completed four constant-power exercise tests randomly assigned to condition (BR or placebo (PL)) and intensity (moderate (40% peak) or severe (85% peak)). Resting mean arterial pressure was significantly lower after BR compared to PL (79.3 ± 5.8 vs 86.8 ± 6.7 mmHg; p < 0.01). All subjects were able to sustain 10 min of exercise at moderate intensity in both conditions. BR had no significant effect on exercise tolerance during severe (342 ± 83 vs 382 ± 138 s, p = 0.382). Brachial artery [Q-dot] was not significantly different after BR at rest or any time during exercise in either intensity. Deoxygenated-[hemoglobin + myoglobin] was elevated at min 2 & 3 for moderate (p < 0.05) and throughout severe exercise (p = 0.03) after BR. The estimated metabolic cost ([V-dot]O₂) was not significantly different during either intensity after BR. These findings support the notion that an acute dose of BR may be valuable to reduce blood pressure in young adults, but revealed that it does not augment [Q-dot] or [V-dot]O₂ during small muscle mass handgrip exercise.
Herspring, Kyle F. "Effects of antioxidants on contracting spinotrapezius muscle microvascular oxygenation and blood flow in aged rats." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/700.
Full textBowen, Thomas Edward Scott. "The plasticity of gas exchange and muscle oxygenation dynamics during exercise in health and disease." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589383.
Full textMcCarthy, G. J. "Clinical studies of muscle relaxation and antagonism in the elderly : with special reference to oxygenation." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317448.
Full textAbbott, John. "Bilateral Muscle Oxygenation Kinetics In Response To Repeat Sprint Cycling In Strong And Weak Individuals." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3696.
Full textCannon, Daniel Timothy. "The dynamics of skeletal muscle metabolism, oxygenation, and fatigue during high-intensity exercise in humans." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.713485.
Full textJöbsis, Paul D. "Muscle oxygenation and blood flow during submersion in ducks (anas platyrhynchos) and seals (phoca vitulina) /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9907822.
Full textTrofe, Aurelio <1985>. "Effect of pulsed electromagnetic fields (pemfs) on muscle activity, tissue oxygenation and vo2 during exercise." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10447/1/EFFECT%20OF%20PULSED%20ELECTROMAGNETIC%20FIELDS%20%28PEMFS%29%20ON%20MUSCLE%20ACTIVITY%2C%20TISSUE%20OXYGENATION%20AND%20VO2%20DURING%20EXERCISE..pdf.
Full textRasdal, Vegard. "Oxygen Consumption in Cycling : The Relationship between Whole Body Pulmonary O2 Consumption and Muscle Oxygenation in Different Muscles During Constant-Load Cycling." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bevegelsesvitenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22821.
Full textLauver, Jakob Del. "The Effect of Eccentric Exercise with Blood Flow Restriction on Muscle Damage, Neuromuscular Activation, and Microvascular Oxygenation." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1430489158.
Full textErupaka, Kinnera. "DETERMINATION OF THE EXTRAVASCULAR BURDEN OF CARBON MONOXIDE (CO) ON HUMAN HEART." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/501.
Full textBRILLAULT, SALVAT CECILE. "Approche integree du metabolisme et de la perfusion musculaire en imagerie et spectroscopie par resonance magnetique nucleaire." Paris 11, 1997. http://www.theses.fr/1997PA11T040.
Full textZhou, Haiying. "Multi-Scale Model Analysis of O2 Transport and Metabolism: Effects of Hypoxia and Exercise." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1254502393.
Full textHilgert, Elcadi Guilherme. "Near infrared spectroscopy for assessing oxygenation and hemodynamics in the upper extremities of healthy subjects and patients with work-related muscle pain." Doctoral thesis, Umeå universitet, Rehabiliteringsmedicin, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-63099.
Full textDodhy, Sami. "EFFECTS OF ISCHEMIA AND REPERFUSION ON THE LOCAL REGULATION OF OXYGEN CONSUMPTION, TISSUE OXYGENATION AND BLOOD SUPPLY IN RAT SKELETAL MUSCLE." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3250.
Full textKowalsky, Jennifer M. "The Effects of Applied Muscle Tension and Respiratory Interventions on Self-Reported Syncopal Symptoms and Cerebral Oxygenation in Healthy Adults with High Needle Fear." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1470771478.
Full textUrell, Charlotte. "Lung Function, Respiratory Muscle Strength and Effects of Breathing Exercises in Cardiac Surgery Patients." Doctoral thesis, Uppsala universitet, Sjukgymnastik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-192208.
Full textGurley, Katelyn. "USE OF HYBRID DIFFUSE OPTICAL SPECTROSCOPIES IN CONTINUOUS MONITORING OF BLOOD FLOW, BLOOD OXYGENATION, AND OXYGEN CONSUMPTION RATE IN EXERCISING SKELETAL MUSCLE." UKnowledge, 2012. http://uknowledge.uky.edu/cbme_etds/3.
Full textMüller, Tessa [Verfasser], and Orsolya [Akademischer Betreuer] Genzel-Boroviczény. "The influence of a patent ductus arteriosus on the peripheral muscle oxygenation and perfusion in neonates / Tessa Müller ; Betreuer: Orsolya Genzel-Boroviczény." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/115950671X/34.
Full textAhmad, Raja Elina A. R. aja. "Magnetic resonance studies of skeletal muscle mitochondrial function in vivo : Physiological implications of metabolic and oxygenation analysis in health and diseased states." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533933.
Full textSpires, Jessica Rose. "Model analysis of oxygen transport and metabolism in skeletal muscle: responses to a change in energy demand." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1365177364.
Full textBiazon, Thaís Marina Pires de Campos. "Efeito da hipóxia local na magnitude da ativação, força, massa e arquitetura muscular decorrente do treinamento de força." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/8018.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Local hypoxia (i.e. intramuscular) resulting from resistance training (RT) contributes to ions H+ accumulation and decreased muscle pH (i.e. metabolic stress). It has been suggested that the accumulation of these metabolites promotes an increase in the motor units (MU) recruitment and consequent increase in cross-sectional area (CSA) and muscle strength. Nevertheless, it remain sunknown whether the level of local hypoxia can affect the magnitude of these adaptations. Objective: The objective of the study was to analyze and compare the effect of local hypoxia during low-intensity resistance training with blood flow restriction (LI-BFR: 3-4 x 20/20% of one repetition maximum [1-RM] / 60% total pressure of occlusion), high-intensity resistance training (HI-RT: 3-4 x 10/80% of 1RM) and high-intensity resistance training with blood flow restriction (HI-BFR: 3-4 x 10/80% 1-RM / 60% total occlusion pressure) on muscle activation, strength, mass and architecture in young individuals. Methods: Thirty young men were selected and each leg allocated to three experimental conditions through unilateral knee extension in randomized order and counterbalanced after ranking by strength level (1- RM) and vastus lateralis (VL) muscle CSA quartiles. The dynamic maximum force was measured by 1-RM test and CSA acquisition, muscle thickness (MT), pennation angle (PA) and VL fascicle length (FL) was performed through ultrasound images. The training program consisted of 10 weeks with a minimum interval of 72 hours between training sessions and the measurement of muscle activation by surface electromyography (EMG) and deoxyhemoglobin ([HHb]) and oxyhemoglobin ([HbO2]) concentrations through near-infrared espectroscopy (NIRS) of VL, performed during the training session with relative load obtained after the 1-RM, before (T1), after five (T2) and ten weeks (T3) training. Results: The training total volume (TV) was greater for HI-RT and HI-BFR compared to LI-BFR. There was no difference between the groups in regarding the increase of 1-RM, CSA, MT and AP. However, the FL showed higher increase for HI-BFR compared to HI-RT and LI-BFR. Regarding the magnitude of the EMG, the HI-BFR group showed higher values than HI-RT and LI-BFR. On the other hand, [HHb] were higher for HI-BFR and LI-BFR, however there was no difference between groups on the reduction of [HbO2].Conclusion: The level of local hypoxia does not influence the magnitude of the increase of muscle activation, strength, mass and architecture changes after resistance training. However, the addition of local hypoxia seems to have a greater contribution to the adjustments resulting from the low-intensity resistance training compared to high intensity.
A hipóxia local (i.e. intramuscular) decorrente do treinamento força (TF) contribui para o acúmulo de íons H+ e diminuição do pH muscular (i.e. estresse metabólico). Sugere-se que o acúmulo desses metabólitos promove aumento no recrutamento de unidades motoras (UM) e consequente aumento da área de secção transversa (AST) e força muscular. Embora isso seja sugerido, ainda não se sabe se o nível de hipóxia local pode afetar a magnitude dessas adaptações. Objetivo: O objetivo do estudo foi analisar e comparar o efeito da hipóxia local durante o treinamento de força de baixa intensidade com restrição do fluxo sanguíneo (TFBI-RFS: 3-4 x 20 / 20% de uma repetição máxima [1-RM] / 60% pressão total de oclusão), treinamento de força de alta intensidade (TFAI: 3-4 x 10 / 80% de 1-RM) e treinamento de força de alta intensidade com restrição do fluxo sanguíneo (TFAI-RFS: 3-4 x 10 / 80% de 1-RM/ 60% pressão total de oclusão) na ativação, força, massa e arquitetura muscular em indivíduos jovens. Métodos: Trinta homens jovens foram selecionados e cada membro inferior alocado nas três condições experimentais de TF de extensão unilateral de joelho em ordem aleatorizada e contrabalanceada após ranqueamento em quartis, para nível de força (1-RM) e AST muscular do músculo vasto lateral (VL). A força máxima dinâmica foi mensurada por meio do teste de 1-RM e a aquisição da AST, espessura muscular (EM), ângulo de penação (AP) e comprimento do fascículo (CF) do VL foi realizada por meio de imagens de ultrassonografia. O programa de treinamento foi composto por 10 semanas com intervalo mínimo de 72 horas entre os treinos. A mensuração da ativação muscular foi realizada por eletromiografia de superfície (EMG) e das concentrações de desoxihemoglobina ([HHb]) e hemoglobina oxigenada ([HbO2]), por meio do near-infrared espectroscopy (NIRS) do VL durante a sessão de treinamento com carga relativa obtida após o teste de 1-RM, antes (T1), após cinco (T2) e dez semanas (T3) do programa de treinamento. Resultados: O volume total (VT) do treinamento foi maior para TFAI e TFAI-RFS comparado ao TFBI-RFS. Não houve diferença entre os grupos em relação ao aumento da 1-RM, AST, EM, AP. Porém, o CF apresentou maior aumento para TFAI-RFS comparado ao TFAI e TFBI-RFS. Em relação à amplitude da EMG, o grupo TFAI-RFS apresentou maiores valores que o TFAI e TFBI-RFS. Por outro lado, as [HHb] foram maiores para o TFAI-RFS e TFBI-RFS, entretanto não houve diferença entre os grupos na redução das [HbO2 ]. Conclusão: O nível de hipóxia local não influência a magnitude do aumento da ativação, força, massa muscular e alterações na arquiteura muscular decorrente do treinamento de força. Entretanto, a adição da hipóxia local parece ter uma maior contribuição para as adaptações decorrentes do treinamento de força de baixa em relação ao de alta intensidade.
Berriri, Ahmed. "Caractérisation fonctionnelle des muscles respiratoires : effets de l'entraînement et du désentraînement." Electronic Thesis or Diss., Amiens, 2017. http://www.theses.fr/2017AMIE0025.
Full textThe aim of thesis was on one hand to characterize the respiratory muscles during an incremental effort until exhaustion and on the other hand, to study the effects of specific inspiratory muscle training and detraining. We first confirmed the development of respiratory muscle fatigue during a maximal incremental exercise. Through recording of oxygenation at the 7th intercostal space, the second study showed reduced intercostal muscle deoxygenation and inspiratory muscle fatigue with a prior inspiratory exercise. Then, we showed that 5 weeks of specific inspiratory muscle training (IMT), whether at high or low intensity, reduces respiratory muscle fatigue induced by maximal incremental exercise. This reduction corroborates the parallel decrease observed in the intercostal muscle oxygen utilization and therefore in their metabolic demands in relation to their fatigability decrease (Study 3 and 4). This may reflect an increase in the oxygen supply of the locomotor muscles. These improvements were greater with high-resistance IMT. However, the IMT induced adaptations were lost after 10 weeks of detraining (Study 5). Nevertheless, reducing training frequency by up to two sessions per week while preserving the same training load was sufficient to maintain the already achieved adaptations. These results highlighted the respiratory muscle implication in the limitation of incremental effort until exhaustion and have contributed to a better understanding of the mechanisms underlying the improvement of performance after IMT particularly respiratory muscle oxygenation and fatigue
Zorgati, Houssem. "Effet de la cadence de pédalage sur les paramètres de l’oxygénation musculaire et cérébrale lors de l’exercice d’intensité modérée et élevée." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA113005/document.
Full textChoosing the pedalling cadence during the cycling exercise, in the laboratory as well as on the field, is a crucial element in fulfilling an exercise. Many studies have examined the effect of pedal cadence on various aspects such as performance, cardiorespiratory parameters, the participation of the “anaerobic” metabolism and muscle recruitment. However, few studies have investigated the effect of pedal cadence on the O2 availability and its utilization in the muscle as well as in the brain. This is why the main objective of this thesis was to understand this subject which is underdeveloped. The aim of our three experimental procedures was on one hand to study the effect of pedal cadence on the heterogeneity of the muscle’s deoxygenation during moderate exercise. On the other hand, to study the effects of pedal cadence on muscle and cerebral oxygenation and also on the performance during heavy exercise in untrained subjects, as well as in endurance-trained subjects.This work allows us to show that at moderate-intensity exercise, whole body V ̇O2 and the heterogeneity of muscle deoxygenation were higher at high cadence than at a lower one, even if the deoxygenation was not altered by the pedalling cadence in non-endurance-trained subjects. On the other hand, during intense exercise performed until exhaustion, the performance improved at 40 rpm than at 100 rpm in untrained subjects, while no significant difference was observed between the two cadences among triathletes. In addition, the O2 extraction in the vastus lateralis depended on the pedal cadence in untrained subjects and the opposite in endurance-trained subjects. Finally, we observed an effect of pedal cadence on cerebral oxygenation and in particular a possible rise in the availability of O2 in the brain on a lower cadence in both population levels. In conclusion, this work has allowed us to highlight the differences in the aerobic fitness of the subjects and in the intensity of the exercise in brain and muscle oxygenation responses and performance during exercises performed at different cadences
Wu, Gary Anthony Auyong. "Evaluation of Tissue Health and Interventions for the Prevention of Pressure Ulcers in Persons with Spinal Cord Injury." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1365168146.
Full textJlali, Islem. "Le diabète de type 1 et le diabète de type 2, deux acteurs de déconditionnent physique : implication de la fonction pulmonaire et de l'oxygénation musculaire et cérébrale." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. https://pepite-depot.univ-lille.fr/ToutIDP/EDBSL/2023/2023ULILS076.pdf.
Full textDiabetes is a complex metabolic condition characterized by disruption of glucose and lipid metabolism. This metabolic alteration has structural and functional repercussions on several target organs such as the lungs and muscle and cerebral tissue. The literature about impaired pulmonary function as well as muscle and cerebral dysfunction in individuals with diabetes, is very large and sometimes contradictory. Furthermore, these alterations can manifest in daily situations, such as exercise, and are frequently associated with micro- and macrovascular complications of diabetes. Although regular exercise is known to improve glycemic control and consequently limit micro- and macroangiopathy, often individuals with diabetes have limited aerobic fitness and exercise intolerance.The main objective of this thesis work was to evaluate the impact of diabetes and chronic hyperglycemia on several stages of the oxygen transport chain at rest and during exercise in individuals with diabetes free from micro and macrovascular complications.In a first part, we examined the effect of diabetes on pulmonary function at rest, by measuring pulmonary flow and volumes using spirometry, as well as alveolar capillary diffusion capacity. Our results showed that, at rest, people with type 1 diabetes (T1D) had values comparable to those of healthy subjects for alveolar capillary diffusion capacity. Furthermore, in individuals with type 2 diabetes (T2D), lung flow and volumes were similar to those of healthy individuals and were not altered, even after maximal exercise.In a second part, we looked at ventilatory responses and muscle and cerebral oxygenation during maximal incremental exercise. We observed, in individuals with T1D, that tidal volume was reduced during maximal exercise, which could explain the altered maximum oxygen consumption (VO2max). This altered VO2max is also observed in people with T2D who present a reduced deoxyhemolobin (HHb) and a reduced total hemoglobin (Hbtot) reflecting impaired blood volume in the active muscle. Furthermore, in people with T2D, we observedalterations in cerebral hemodynamics, characterized by a decrease in oxyhemoglobin (HbO2) and total hemoglobin during maximal exercise.In conclusion, our results highlight that, although alterations in pulmonary function are still absent at rest, subclinical alterations appear in muscle and cerebral oxygenation during exercise in individuals with diabetes, even in the absence of micro and macrovascular complications. The research work of this thesis contributes to a better understanding of the mechanisms underlying the functional limitations observed in individuals with diabetes and opens perspectives for more targeted management of their metabolic and cardiorespiratory health
Heiden, Marina. "Psychophysiological reactions to experimental stress : relations to pain sensitivity, position sense and stress perception." Doctoral thesis, Umeå : Umeå University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-879.
Full textSmith, Kurt, and University of Lethbridge Faculty of Arts and Science. "Men and women in hypoxia : the influence of tissue oxygenation on repeated-sprint ability." Thesis, Arts and Science, 2010. http://hdl.handle.net/10133/2548.
Full textix, 108 leaves : ill. ; 29 cm
Guerci, Philippe. "Current and new therapies for the critically injured microcirculation The macro- and microcirculation of the kidney Endothelial dysfunction of the kidney in sepsis. Section 15: Infectious Diseases and Sepsis, Chapter 89 Impact of fluid resuscitation with hypertonic-hydroxyethyl starch versus lactated ringer on hemorheology and microcirculation in hemorrhagic shock Glycocalyx Degradation Is Independent of Vascular Barrier Permeability Increase in Nontraumatic Hemorrhagic Shock in Rats Glycocalyx shedding during stepwise hemodilution and microvascular permeability A LED-based phosphorimeter for measurement of microcirculatory oxygen pressure The role of bicarbonate precursors in balanced fluids during haemorrhagic shock with and without compromised liver function Effects of N-acetylcysteine (NAC) supplementation in resuscitation fluids on renal microcirculatory oxygenation, inflammation, and function in a rat model of endotoxemia Effect of Polyethylene-glycolated Carboxyhemoglobin on Renal Microcirculation in a Rat Model of Hemorrhagic Shock Resuscitation with PEGylated carboxyhemoglobin preserves renal cortical oxygenation and improves skeletal muscle microcirculatory flow during endotoxemia." Thesis, Université de Lorraine, 2020. http://www.theses.fr/2020LORR0053.
Full textFor the past 20 years, the microcirculation has been regarded as cornerstone in the development of organ failure in critically ill patients. Eventually, the microcirculation became a therapeutic target. Due to the complexity of the microarchitecture of this functional system, varying across organs, one therapy cannot “fit all”. The alterations observed in the critically injured microcirculation involve: (i) the container defined by the different layers of the vascular wall including the endothelial cells and a protective gel called the glycocalyx spread on the surface, where contact with blood is made, (ii) the contents representing the flowing plasma and the different elements of blood and (iii) the extraluminal surrounding tissue. The microcirculation can be injured in various ways, with different levels of injury to these constitutive elements. Thus, to appropriately resuscitate the injured microcirculation, the choice of the optimal therapy or bundle of therapies should be rationalized with a meticulous analysis of the damages suffered by the microcirculation. The evaluation of the microcirculation should be multivariate. In this thesis, the research was mainly focused on the kidney. The first part is dedicated to the review of the structural and functional mechanisms of the renal microcirculation in both healthy and septic states. The second part tries to identify the respective roles of each of the components of the microcirculation in critical conditions especially the glycocalyx and plasma viscosity. The vascular barrier permeability was investigated in hemorrhagic shock and hemodilution models in rodents. The main findings suggest that a gradation in the level of injury to the vascular barrier permeability exist.The last part of the thesis investigated how current and older therapies can modulate microcirculation in terms of oxygenation, inflammation and microcirculatory flow within the kidney. Among therapies investigated, N-acetylcysteine was efficient at limiting inflammation and increasing oxygenation within the kidney. A new generation of hemoglobin-based oxygen carrier showed some efficacy in murine endotoxemic model. Overall, these different findings coalesce to show the importance of having a multivariate analysis of the microcirculation, as each of the therapies acts on a specific aspect of it. Hopefully, this research helped pave the way for a more personalized medicine for the patients
Bretonneau, Quentin. "Effet d'une pression expiratoire positive au repos et à l'exercice sur l'oxygénation des muscles intercostaux chez des sujets sains." Thesis, Poitiers, 2020. http://www.theses.fr/2020POIT2259.
Full textIn patients with obstructive pulmonary disease, airway narrowing can induce ventilatory disturbances such as expiratory flow limitation (EFL) and/or pulmonary hyperinflation (PH). In such a context, the metabolic balance could be disturbed within the intercostal muscle tissue, especially during exercise, which could promote the onset or worsening of dyspnea.To simulate ventilatory disturbances that may be encountered by patients with obstructive pulmonary diseases (e.g. abnormally high resistance of the airways to expiration, EFL and PH), a positive expiratory pressure (PEP) of 20 cmH2O was imposed at rest and during exercise in healthy subjects. Oxygenation of the intercostal muscles was measured by near-infrared spectroscopy at the 7th intercostal space.At rest, a decrease in oxyhemoglobin concentration ([O2Hb]) probably linked to a decrease in total hemoglobin concentration ([tHb], i.e. local blood volume) was observed in response to PEP (Study 1). However, no reduction in tissue oxygen saturation index (TSI) was reported (Studies 1 to 3), even in a context of PEP-induced PH (Study 2). During exercise, a lower increase in [O2Hb] and [tHb] was observed when PEP was imposed (vs. control). A decrease in TSI and inspiratory capacity was also reported between rest and exercise in this condition (Study 3).According to the results of our studies, when a PEP of 20 cmH2O is imposed at rest in young healthy subjects, no metabolic imbalance seems to occur in the intercostal muscles. However, when this PEP is imposed during exercise, a disturbance of the metabolic balance seems to happen. This could be partly explained by local hemodynamic alterations induced by PH. However, further studies are needed to clarify this aspect.Finally, no relationship between dyspnea and the metabolic condition of the intercostal muscles was observed during our studies. However, correlations between respiratory discomfort and instantaneous ventilatory flows were highlighted at rest and during exercise with PEP (Studies 1 and 3). A relationship between dyspnea and PH was also observed at rest (Study 2).Future research will aim to verify, at rest and during exercise, whether the oxygenation of the intercostal muscles is influenced by PH in patients with obstructive pulmonary pathologies
Martins, Nuno Filipe Casanova. "Effects of roller massager on muscle performance, morphology, and oxygenation after exercise-induced muscle damage." Master's thesis, 2016. http://hdl.handle.net/10400.5/11867.
Full textEste estudo avaliou a eficácia do roller massager (RM) na recuperação dos flexores plantares após dano muscular induzido pelo exercício (DMIE). Duas experiências foram conduzidas. A primeira (n=10) examinou variáveis funcionais [i.e., contração voluntária isométrica máxima dos flexores plantares (CVIM) e contração submáxima (30% da CVIM) contínua; amplitude articular máxima do tornozelo em dorsiflexão e resistência ao alongamento; e limiar da dor sob pressão] e morfológicas [área de secção transversa do gémeo medial (GM), espessura, comprimento e ângulo dos fascículos], antes e imediatamente, 1h, 24h, 48h e 72h após DMIE. Na segunda experiência (n=10), alterações na concentração de hemoglobina desoxigenada (velocidade e amplitude) do GM durante o teste de contração submáxima contínua foram observadas antes e 48h após DMIE. Os participantes realizaram ambas as experiências por duas vezes, com e sem (NRM) a aplicação do RM (6 x 45 segundos com 20 segundos entre séries). A intervenção com RM não alterou os danos na força e flexibilidade dos flexores plantares provocados pelo DMIE, nem a morfologia e cinética de oxigénio do GM (p>0.05). Por outro lado, foi observada uma forte tendência para uma alteração aguda no limiar da dor sob pressão (durante 1 hora) no GM ipsilateral (efeitos imediatamente após: RM=+19%, NRM=-5%, p=0.032) e contralateral (p=0.095). Concluindo, estes resultados sugerem que o roller massager não induz efeitos na recuperação do desempenho muscular, morfologia, e oxigenação após DMIE, com excepção do limiar da dor sob pressão (i.e., dor). Assim, a utilização do RM pode ter potencial em pessoas com dores musculares, se aplicado imediatamente antes da atividade.
Huang, Hsin-Wei, and 黃馨葦. "Effects of different stretching techniques on isokinetic strength and muscle oxygenation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/10182177060770718468.
Full text國立臺灣師範大學
體育學系
100
Purpose: To investigate the acute effects of the different stretching techniques on the isokinetic strength and muscle oxygen saturation. Methods: Eighteen male collegiate athletes (age, 21.4 ± 2.0 yrs; height, 179.8 ± 7.8 cm; weight, 73.8 ± 9.3 kg) voluntarily participated in this repeated measures and counter-balanced designed study. All subjects were asked to perform three treatments separated by 48 hours, including control (CON), passive static stretching (SS, 3 × 30-sec), and passive ballistic stretching (BS, 3 × 60-sec), before the isokinetic strength test. The muscle oxygen saturation was measured by the near-infrared spectroscopy during treatments. After the treatments, the isokinetic strength (60°•sec-1、240°•sec-1) test, 2 sets of 3 repetitions with 2 min rest interval, was used to assess the peak torque, average peak torque, total work, and average power. Results: The peak torque in 60°•sec-1 at 2nd set (BS vs. CON, 3.09 ± 0.36 vs. 2.93 ± 0.28 N•m•kg-1, p < .05) and average value of two sets (BS vs. CON, 3.02 ± 0.35 vs. 2.88 ± 0.29 N•m•kg-1, p < .05) in BS treatment was significantly higher than those in CON. The average peak torque in 60°•sec-1 at 2nd set in BS was significantly higher than that in CON. The average peak torque at average value of two sets in 60°•sec-1 in BS was significantly higher than those in SS and CON (BS vs. SS vs. CON, 2.86 ± 0.34 vs. 2.74 ± 0.34 vs. 2.71 ± 0.28 N•m•kg-1, p < .05). No significant differences were found on peak torque, average peak torque, and total work in 240°•sec-1 among three treatments. The tissue saturation index during first set of stretching exercise in SS was significantly lower than that in CON (SS vs. CON, -5.73 ± 6.39 vs. -0.30 ± 4.82 %, p < .05). The average values of total haemoglobin during treatments in SS were significantly different from those in BS and CON (SS vs. BS vs. CON, -8.60 ± 1.47 vs. -5.14 ± 1.44 vs. 0.36 ± 1.41 μmol, p < .05). Conclusion: These results indicate that although the SS (3 × 30-sec) might not inhibit subsequent isokinetic strength, stretching in this manner might induce muscle deoxygenation. In addition, the pre-event BS might improve the isokinetic strength in low velocity (60°•sec-1), and attenuate the SS induced muscle deoxygenation.