Relevant bibliographies by topics / Hamstring

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hamstring'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2023

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Journal articles on the topic "Hamstring"

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Lee, Jin Hyuck, Ki-Mo Jang, Eunseon Kim, Hye Chang Rhim, and Hyeong-Dong Kim. "Effects of Static and Dynamic Stretching With Strengthening Exercises in Patients With Patellofemoral Pain Who Have Inflexible Hamstrings: A Randomized Controlled Trial." Sports Health: A Multidisciplinary Approach 13, no. 1 (August 13, 2020): 49–56. http://dx.doi.org/10.1177/1941738120932911.

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Background: Patellofemoral pain (PFP) syndrome is closely associated with muscle tightness. However, studies regarding the effects of stretching exercises on PFP patients with inflexible hamstrings are scarce. The aim of the study was to compare the effects between static and dynamic hamstring stretching in patients with PFP who have inflexible hamstrings. Hypothesis: Compared with static hamstring stretching, dynamic hamstring stretching will improve the parameters of hamstring flexibility, knee muscle strength, muscle activation time, and clinical outcomes in this patient population. Study Design: Prospective randomized controlled trial. Level of Evidence: Level 2. Methods: A total of 46 patients (25, static stretching; 21, dynamic stretching) participated. Hamstring flexibility was assessed according to the popliteal angle during active knee extension. Muscle strength and muscle activation time were measured using an isokinetic device. Clinical outcomes were evaluated using the visual analog scale (VAS) for pain and the anterior knee pain scale (AKPS). Results: There were no differences in hamstring flexibility and knee muscle strength of the affected knees between the groups ( P > 0.05). Significantly improved muscle activation time and clinical outcomes of the affected knees were observed in the dynamic stretching group compared with the static stretching group (all Ps < 0.01 for hamstring, quadriceps, VAS, and AKPS). Conclusion: In patients with PFP who have inflexible hamstrings, dynamic hamstring stretching with strengthening exercises was superior for improving muscle activation time and clinical outcomes compared with static hamstring stretching with strengthening exercises. Clinical Relevance: Clinicians and therapists could implement dynamic hamstring stretching to improve function and reduce pain in patients with PFP who have inflexible hamstrings.
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Kellis, Eleftherios, Nikiforos Galanis, and Nikolaos Kofotolis. "Hamstring-to-Quadriceps Ratio in Female Athletes with a Previous Hamstring Injury, Anterior Cruciate Ligament Reconstruction, and Controls." Sports 7, no. 10 (September 28, 2019): 214. http://dx.doi.org/10.3390/sports7100214.

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Muscle strength imbalances around the knee are often observed in athletes after anterior cruciate ligament (ACL) surgery and hamstring muscle injury. This study examined three hamstrings-to-quadriceps (H:Q) strength ratio types (conventional, functional, and mixed) in thirteen female athletes with a history of hamstring injury, fourteen basketball players following ACL reconstruction and 34 controls. The conventional (concentric H:Q) peak torque ratio was evaluated at 120°·s−1 and 240°·s−1. The functional (eccentric hamstring to concentric quadriceps) torque ratio was evaluated at 120°·s−1. Finally, the mixed (eccentric hamstrings at 30°·s−1 to concentric quadriceps at 240°·s−1) torque ratio was calculated. Both ACL and the hamstring-injured groups showed a lower quadriceps and hamstrings strength compared with controls (p < 0.05). However, non-significant group differences in the H:Q ratio were found (p > 0.05). Isokinetic assessment of muscle strength may be useful for setting appropriate targets of training programs for athletes with a history of ACL surgery or hamstring strain. However, isokinetic evaluation of the H:Q ratio is not injury—specific and it does not vary between different methods of calculating the H:Q ratio.
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Shahariyar Ahmed, Asifuzzaman, and Gourang Kumar Padhy. "Effectiveness of Myofascial Release in Increasing Hamstring Flexibility: A Brief Study." BOHR International Journal of Social Science and Humanities Research 2, no. 1 (2023): 1–6. http://dx.doi.org/10.54646/bijsshr.017.

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Hamstring tightness is a common issue that affects many people. The flexibility and range of motion of the joint are both limited when this muscle is contracted. Lower back and lower extremity problems are frequently linked to poor hamstring flexibility. Active release technique and myofascial release technique can improve hamstring flexibility. The major goal of this study is to increase hamstring flexibility so that we can compare active release technique with myofascial release technique for effectiveness. The appropriate course of action for treating those with tight hamstrings to increase their hamstring flexibility can then be determined.
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Lubis, Andri. "ACL reconstruction: Which grafts can be used if hamstring is too small?" Orthopaedic Journal of Sports Medicine 7, no. 11_suppl6 (November 1, 2019): 2325967119S0045. http://dx.doi.org/10.1177/2325967119s00458.

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Hamstring grafts are the most often grafts used for ACL reconstruction procedures. Especially in Asia, hamstrings are preferable since small incision for taking the graft, and not produce anterior knee pain during kneeling, since there is no bony part taken. However, sometimes hamstring is too small for the graft. Many literatures mention that at least 7-8 mm needed for the best result of ACL reconstruction using hamstring tendon. It is not easy to predict the size of the hamstring tendon before surgery. Quadriceps tendons are good alternative as the grafts for ACL reconstruction. However, sometimes surgeons realize that hamstring is too small after they took the hamstring. The peroneus longus tendon can be added to the small hamstring. Even though peroneus longus tendon should not be used routinely, it could be considered if the hamstring that has been taken is too small.
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Paranjape, Swati, and Nishigandha Naik. "Comparison of Effectiveness of Passive Hamstring Stretching Technique and Neurodynamic Sciatic Nerve Sliding Technique in Low Back Pain." International Journal of Research and Review 8, no. 12 (December 9, 2021): 54–62. http://dx.doi.org/10.52403/ijrr.20211208.

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Objective: Low back pain (LBP) is a very common health problem worldwide having global point prevalence of 9.4%. Correlations have been found between decreased length of the hamstrings and LBP. It was found that improving the flexibility of hamstrings can significantly reduce chronic LBP. This study compared the effectiveness of two techniques i.e. passive hamstring stretching technique (PHS) and neurodynamic sciatic nerve sliding technique (NDS) on hamstring flexibility and pain in non-radiating LBP patients. Methods: 26 patients between the age group of 25-45 years having non-radiating LBP were recruited in the study. Group A (n=13) were given passive hamstring stretching while Group B (n=13) performed neurodynamic sciatic nerve sliding technique under guidance of the researcher. Baseline data were obtained for hamstring length and pain before and after intervention. Pain was assessed using ‘visual analogue scale’ and hamstring length was measured using ‘passive knee extension test’. Intervention was performed on alternate days for three sessions with 48 hours rest period in between each session. Results: Data were analysed for hamstring length and pain between both the groups using ‘unpaired t’ test. NDS technique was statistically significantly more effective in improving pain (p =0.03 at 95%CI= -2.07 to -0.09). There was no statistically significant difference in the effectiveness of both techniques in improving hamstring length (p =0.08 at 95%CI= -3.4 to 0.25). Conclusions: Both the techniques are equally effective in improving hamstring length, however NDS was more effective in improving pain in low back pain patients as compared to PHS. Keywords: Low back pain; Neural sliders; Static hamstring stretch; Hamstring flexibility .
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Lempainen, Lasse, Jussi Kosola, Ricard Pruna, Jordi Puigdellivol, Janne Sarimo, Pekka Niemi, and Sakari Orava. "Central Tendon Injuries of Hamstring Muscles: Case Series of Operative Treatment." Orthopaedic Journal of Sports Medicine 6, no. 2 (February 1, 2018): 232596711875599. http://dx.doi.org/10.1177/2325967118755992.

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Background: As compared with injuries involving muscle only, those involving the central hamstring tendon have a worse prognosis. Limited information is available regarding the surgical treatment of central tendon injuries of the hamstrings. Purpose: To describe the operative treatment and outcomes of central tendon injuries of the hamstrings among athletes. Study Design: Case series; Level of evidence, 4. Methods: Eight athletes (6 top level, 2 recreational) with central hamstring tendon injuries underwent magnetic resonance imaging and surgical treatment. The indication for surgery was recurrent (n = 6) or acute (n = 2) central hamstring tendon injury. All patients followed the same postoperative rehabilitation protocol, and return to play was monitored. Results: Magnetic resonance imaging found a central tendon injury in all 3 hamstring muscles (long head of the biceps femoris, semimembranosus, and semitendinosus) with disrupted tendon ends. In acute and recurrent central tendon injuries, full return to play was achieved at 2.5 to 4 months. There were no adverse events during follow-up. Conclusion: Central tendon injuries of the hamstrings can be successfully repaired surgically after acute and recurrent ruptures.
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Khalil, Elaaf, Ruhma Tariq, Hafiz Muhammad Arsalan, Amna Khalid, Sultan Ayaz, and Hassan Javed. "Prevalence of hamstrings tightness and its impact on lower extremity function in asymptomatic individuals with prolonged standing hours Authors." International Journal of Natural Medicine and Health Sciences 1, no. 4 (September 30, 2022): 27–30. http://dx.doi.org/10.52461/ijnms.v1i4.1040.

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Background: Hamstrings undergo adaptive shortening. It is common in healthy individuals to have a sedentary lifestyle affecting males (91.8%) more than females (78.7%). Hamstring tightness can interrupt ADL’s predisposing the person to further health problems i.e. plantar fasciitis, sacroiliac joint pain, decreased lumbar lordosis, knee pain, quadriceps malfunction, postural disturbances, overstretched lumbar ligaments, reduced muscle strength. Aims and Objectives: To analyze the prevalence of hamstring tightness and its effects on lower extremity function in individuals with prolonged standing. Materials and Methods: 65 participants were chosen for this cross-sectional study by convenient sampling; all were female nurses. The hamstring tightness was measured by the data collection tools i.e. lower limb task questionnaire, straight leg raise test, and active knee extension test after having the consent forms signed by the participants. The data was collected from three big hospitals in the city. Results: The results of the study conducted to see the prevalence of hamstrings tightness and its impact on lower extremity function in asymptomatic individuals with prolonged standing hours showed that only 15.38% of the sample (n=65) with a mean age of 31-35 years were found with bilateral hamstrings tightness while 84.62% were found with no hamstrings tightness. Conclusion: The prevalence of hamstring tightness in asymptomatic individuals with prolonged standing hours is low.
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Shi, Yinbin, Gengsi Xi, Mengzi Sun, Yuliang Sun, and Li Li. "Hamstrings on Morphological Structure Characteristics, Stress Features, and Risk of Injuries: A Narrative Review." Applied Sciences 12, no. 24 (December 11, 2022): 12713. http://dx.doi.org/10.3390/app122412713.

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Hamstring injury has been considered one of the most common exercise-induced injuries in sports. Hamstring injuries mostly occur proximal to the biceps femoris. However, the reasons and mechanisms remain unclear. To summarize hamstring morphological structure features and what the relationship is between their structure and risk of injury from the current literature, this review discussed the possible injury mechanism of hamstrings, from the morphological and connected pattern diversity, the mechanical properties, and the stress–strain performance, to probable changes in action control. Morphological and connected pattern diversity of hamstrings components show heterogeneous loads under muscle tension. Connections of gradient compliance between different tissues may lead to materials’ susceptibility to detachments near the tendon–bone junction sites under heterogeneous load conditions. The hamstrings muscle’s motor function insufficiency also brings the risk of injury when it performs multi-functional movements during exercise due to the span of multiple joints’ anatomical characteristics. These structural features may be the primary reason why most damage occurs near these sites. The role of these biomechanical characteristics should be appreciated by exercise specialists to effectively prevent hamstring injuries. Future work in this research should be aimed at exploring the most effective prevention programs based on the material structure and motor control to enhance the properties of hamstring muscle materials to minimize the risk of injury.
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Sannicandro, Italo, Giacomo Cofano, and Paolo Traficante. "Methodology and exercises to reduce the hamstring injury risk: from literature knowledges to the field." MOJ Sports Medicine 4, no. 1 (March 19, 2020): 17–22. http://dx.doi.org/10.15406/mojsm.2020.04.00088.

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Injury prevention is a topic that has received greater attention in recent years: in fact, even if knowledge and research about prevention has increased, the injury incidence remains very high, especially as regards the hamstring district. As can be seen from the scientific literature, there are many studies that have described risk factors, but above all what strategies can be used to decrease this incidence through the prevention exercises. The exercise considered the gold standard for the hamstring injuries prevention is the Nordic hamstring although the literature highlights the particular complexity of the anatomical district of hamstrings. For these reasons, it seems simplistic and reductive to assume that one exercise is sufficient. In this study is proposed further exercises proposed in the literature that can integrate the traditional Nordic hamstring and help to activate more fully all the muscle heads that make up the hamstrings. In conclusion, in a prevention session or in a strength session, in addition to the Nordic hamstring exercise, other exercises could be included, such as the Laying Kick, the Standing Kick, the Nordic bump, the Nordic with return, the Cranes and the Cranes return.
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Harput, Gulcan, Hasan Erkan Kılınc, Hamza Özer, Gül Baltacı, and Carl G. Mattacola. "Knee Muscle Strength Recovery in the Early Period After ACL Reconstruction." Orthopaedic Journal of Sports Medicine 2, no. 11_suppl3 (November 1, 2014): 2325967114S0014. http://dx.doi.org/10.1177/2325967114s00141.

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Objectives: The aim of this study was to investigate quadriceps and hamstrings isometric strength at 4, 8 and 12 week time points following ACL Reconstruction (ACLR) and to document the strength changes of these muscles over time. The primary hypothesis was that there would be significant increases in quadriceps and hamstring muscle strengths between the 4th, 8th and 12th weeks following ACLR. The secondary hypothesis was that the quadriceps index would be higher than hamstring index at 12th week after ACLR. Methods: Thirty patients (Mean ± SD [age, 29.1±2.3yrs; weight, 77.3±13.2kg; height, 172.1±7.1cm; BMI, 21.2±3.5kg/m2, time to surgery: 7.1±7.2 months]) who underwent ACLR with Hamstring Tendon Autograft (HTG) were enrolled in this study. The isometric strength of quadriceps and hamstring muscles was measured on an isokinetic dynamometer at 60° knee flexion angle at 4th, 8th and 12th weeks after surgery. The recovery of quadriceps and hamstring muscles strength following rehabilitation was expressed as a Quadriceps Index (QI) and Hamstring Index (HI) and calculated with the following formula:[(maximum voluntary isometric torque of the involved limb / maximum voluntary isometric torque by uninvolved limb) × 100]. Torque output of the involved and uninvolved limbs and quadriceps and hamstring indexes were used for the statistical analysis. A repeated measures of ANOVA was used to determine the strength changes of quadriceps and hamstrings over time. Results: Quadriceps and Hamstrings strengths significantly increased over time for both involved (Quadriceps: F (2,46)=58.3, p<0.001, Hamstring: F (2,46)=35.7, p<0.001) and uninvolved limb (Quadriceps: F(2,46)=17.9, p<0.001, Hamstring: F(2,46)=56.9, p=0.001 ). Quadriceps strength was higher at 12th week when compared to the 8 and 4 week time points for the involved limb (p<0.001), and it was higher at 8th week when compared to 4 week time point for the involved limb (p<0.001). For the uninvolved limb, quadriceps strength was also higher at 12th week when compared to the 8 (p=0.02) and 4 week time point (p<0.001), and higher at 8 week when compared to the 4 week time point (p=0.02). Hamstring strength was higher at 12 week when compared to the 8 and 4 week time points (p<0.001) and it was higher at 8 week when compared to 4 week time point for the involved limb (p<0.001). For the uninvolved limb hamstring strength was also higher at 12 week when compared to 4 week time point (p=0.01). There was no significant difference between the 4 and 8 week time points (p>0.05) or between the 8 and 12 week time points (p=0.07). Quadriceps and hamstring indexes significantly changed from 4th weeks (QI:57.9, HI:54.4 ) to 8th weeks (QI:78.8, HI:69.9 ) and from 8th weeks to 12th weeks (QI:82, HI:75.7 ) (p<0.001); however, there was no difference between indexes at the 12-week time point (p=0.17). Conclusion: Isometric strength of quadriceps and hamstring muscles for the involved and uninvolved limb increased during the early period of ACLR. The results of this study could be a baseline for clinicians while prescribing a rehabilitation protocol for ACLR patients with HTG to better appreciate expected strength changes of the muscles in the early phase.
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Dissertations / Theses on the topic "Hamstring"

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Robinson, Elizabeth M. "Unilateral PNF Hamstring Stretching on Contralateral Hamstring Flexibility." Ohio Dominican University Honors Theses / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=oduhonors1399312746.

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Walker, John W. "Use of Nordic Hamstring Exercise to Improve Hamstrings Function in Patients after ACL Reconstruction." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556811041471286.

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Askling, Carl. "Hamstring muscle strain." Doctoral thesis, Swedish School of Sport and Health Sciences, GIH, Laboratory for Biomechanics and Motor Control, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-425.

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Background: Acute hamstring strains are common injuries in different sports. They are often serious, causing long rehabilitation times and a proneness for re-injury. Preliminary observations indicate that the injuries can be of at least two types, one occurring during high-speed running and the other during motions where the hamstring muscles reach extreme lengths.

Aims: To investigate the possible existence of different types of acute hamstring strains in two specific athletic groups, namely sprinters and dancers, as well as the generality of these findings in other sports.

Methods: In the first project, 18 sprinters and 15 dancers with acute first time hamstring strains were prospectively included. All subjects were examined, clinically and with magnetic resonance imaging (MRI), on 4 occasions after injury: at day 2-4, 10, 21 and 42. The follow-up period was 2 years. In the second project, 30 subjects from 21 different sports were prospectively included. All subjects were examined clinically and with MRI. The follow-up period lasted until the subjects returned to sport or finished their sport activity due to the injury.

Results: All sprinters sustained their injuries during competitive high-speed running. In contrast, all dancers encountered their injuries during slow-speed stretching type of exercises. The initial loss of strength and flexibility was significantly greater in sprinters than in dancers. At 42 days after injury, both groups could perform more than 90% of the test values of the uninjured leg. All the sprinters’ injuries were primarily located in biceps femoris long head, whereas the dancers’ injuries were mainly (87%) involving the proximal free tendon of semimembranosus. For the sprinters, involvement of the proximal free tendon, as estimated by MRI, and proximity to the ischial tuberosity, as estimated both by palpation and MRI, were associated with significantly longer time to return to pre-injury level. In the dancers, there were no significant correlations between clinical or MRI parameters and time to return to per-injury level. The time to pre-injury level was significantly longer (median 50 weeks, range 30-76) for the dancers compared to the sprinters (16, 6-50). In the second project, all injuries occurred during movements reaching a position with combined extensive hip flexion and knee extension. They were all located close to the ischial tuberosity and 83% involved the proximal free tendon of semimembranosus. Fourteen subjects (47%) decided to end their sport activity and for the remaining 16 subjects the median time back to sport was 31 (range 9-104) weeks. There were no significant correlations between clinical and MRI parameters and time to return to sport.

Conclusions: There seems to be a link between the injury situation and the two types of acute hamstring strain in sprinters and dancers with respect to clinical findings, injury location, muscles and tissues involved, and time to return to pre-injury level. Proximity of the injury to the ischial tuberosity, as estimated both by palpation and MRI, is associated with longer recovery time. Also in other sports, an injury situation where the hamstrings reach extensive lengths caused a specific injury to the proximal posterior thigh similar to that described in dancers. Due to the prolonged recovery time associated with this type of injury, correct diagnosis based on history, clinical and MRI investigation, and adequate information to the athletes are essential.


För att beställa tryckta exemplar av avhandlingen kontakta Carl Askling, carl.askling@gih.se
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Edirnelis, Dimos. "Nordic Hamstrings Exercise och Razor Hamstring Curls effekt på muskelstyrka och rörlighet i hamstrings för fotbollsspelande ungdomar." Thesis, Umeå universitet, Avdelningen för idrottsmedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-177010.

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Syftet med denna studie var att undersöka effekten av 6 veckors styrketräning med så kallad Nordic Hamstring Exercise (NHE) i jämförelse med Razor Hamstring Curl (RHC) med avseende på hamstringsmuskulaturens styrka och rörlighet hos unga fotbollsspelare.   43 fotbollsspelande ungdomar från två olika lag rekryterades till studien varav 40 slutförde den. Deltagarna var av manligt kön och hade en medelålder på 17.2 ± 0.6. De randomiserades till två olika interventionsgrupper, NHE och RHC, där de fick utföra tilldelad övning under träningstid under sex veckor. Mätning av hamstrings rörlighet och isometrisk utvärdering av hamstrings muskelstyrka i 90°-, 45°- och 0°- knävinkel utfördes innan och efter intervention. Parade t-test och Wilcoxon signed rank test användes för att testa förändringen inom grupp och ANCOVA användes för att se skillnaderna mellan grupperna.    NHE-gruppen hade en signifikant ökning av muskelstyrkan i samtliga testvinklar. RHC gruppen hade signifikant ökning i endast två av tre testvinklar. Mätningen i 0° visade ingen signifikant ökning av muskelstyrkan. Rörligheten hade en signifikant ökning i båda interventionsgrupperna. När interventionsgrupperna testades mot varandra så hade NHE gruppen en signifikant högre ökning av muskelstyrkan i 0° mätningen jämfört med RHC gruppen. Ingen signifikant skillnad uppmärksammades i de andra testvinklarna eller i ökningen av rörligheten.   Både NHE- och RHC-träning under 6 veckor resulterade i signifikant ökning av muskelstyrka och rörlighet i hamstringsmuskulaturen hos unga fotbollsspelare. NHE resulterade dock i en signifikant större ökning av muskelstyrkan i ett större rörelseomfång än RHC-övningen. Baserat på resultaten i denna studie är NHE den föredragna metoden att inkludera i framtida träningsprogram.
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張劍強 and Kim-keung Cheung. "The effect of hamstring stretching technique on hamstring flexibility and isokinetic strength." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B3125715X.

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Cheung, Kim-keung. "The effect of hamstring stretching technique on hamstring flexibility and isokinetic strength /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23425374.

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Siegel, Lori L. "Hamstring rehabilitation a systematic review /." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5158.

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Thesis (M.S.)--West Virginia University, 2007.
Title from document title page. Document formatted into pages; contains vi, 98 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
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Nejo, Yusuke. "The Graston Technique? Increases Hamstring Flexibility." Thesis, North Dakota State University, 2014. https://hdl.handle.net/10365/27374.

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Soft tissue mobilization techniques have been reported to increase hamstring flexibility. However, no one has reported the effects of the Graston Technique? on increasing hamstring flexibility. The purpose of this study was to determine the changes in range of motion after applying the Graston Technique? to tight hamstring muscles. Forty five college-aged students participated; 3 well-trained athletes, 35 physically trained students, and 7 untrained students (total 30 men and 15 women). Pre- and post-treatment measurements on hamstring flexibility were taken at the 90/90? position using a goniometer. There was a statistically significant difference between the sham treatment group and the treatment groups (an only Graston Technique? group and a whole Graston Technique? treatment group). However, there was no significant difference between the only Graston Technique? group and the whole Graston Technique? treatment group. Also, range of motion increase was affected by the adipose tissue thickness.
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Rolf, Ola, and Wictoria Zetterberg. "Korrelation i smärta & obehag vid två olika hamstring tester hos fotbollsspelare." Thesis, Mälardalens högskola, Akademin för hälsa, vård och välfärd, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-14372.

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Bakgrund: Det är viktigt att kliniskt kunna avgöra om idrottaren är tillräckligt rehabiliterad för att återgå till full träning och matchspel eftersom otillräcklig rehabilitering är den största riskfaktorn för återskada i hamstrings. Därför skulle ett test med enkel utrustning behöva komplettera den kliniska undersökningen. Syfte: Studiens syfte är att undersöka vilket samband som finns mellan genomförandet av Nordic hamstring strength test och Asklings hamstring test utifrån skattning av smärta och obehag i samband med testen. Huruvida deltagarnas tilltro till att prestera sitt yttersta i en 90 min fotbollsmatch påverkas efter testerna samt att beskriva obehag och smärta efter testerna för spelare som varit skadad eller inte under senaste sex månaderna. Metod: 22 fotbollsspelare fick skatta sin tilltro till sin egen förmåga att prestera sitt yttersta i en 90 min fotbollsmatch samt skatta obehag och smärta med VAS i samband med testerna. Hamstring Outcome Score användes för att få en helhetssyn av deltagarnas funktion och skadehistoria kring hamstring. Spearman’s rho och Wilcoxon’s teckenrang test användes för att analysera resultatet. Resultat: Korrelationen mellan Asklings hamstring test och Nordic hamstring strength test var moderat (0,4-0,6) dock signifikant på <0,05. Majoriteten av spelarna sänkte sin tilltro efter testerna. De yngre spelarna har varit skadade senast men det är de äldsta spelarna som har dragit på sig flest skador. Slutsatser: Vidare forskning på ett större antal deltagare behövs för att avgöra om Nordic hamstring strength test skulle kunna användas som ett kompletterande test till den kliniska undersökningen.
Backgroud: It’s important to clinically determine whether the athlete is ready to return to full training and match play as inadequate rehabilitation are the major risk factor for reinjury in the hamstrings. Therefore, a test with simple equipment is needed to complement the clinical examination. Purpose: The study aims to investigate the relationship between the implementation of the Asklings hamstring test and the Nordic hamstring strength test based on the estimation of pain and discomfort during the tests. Whether the participants’ confidences to perform their best in a 90 minutes soccer game is affected by the tests, and describe pain and discomfort after the tests for those who had or had not been injured during the last six months. Methods: 22 football players had to rate their confidence in their own ability to perform their best in a 90 minutes football game, and estimate the discomfort and pain using VAS during the tests. Hamstring Outcome Score was used to obtain a holistic view of the participants’ function and injury history about hamstrings. Spearman’s Rho and Wilcoxon’s Rank Sum test was used to analyze the results. Result: There is a moderate correlation (0,4-0,6) between Askling hamstring test and Nordic hamstring strength test with a significance level of p<0,05. The majority of the players lowered their confidence after the tests. The younger players have been injured most recently but the oldest players have had the most injuries. Conclusion: Further research with a larger number of participants is needed to determine whether Nordic hamstring strength test could be used as a complementary test to the clinical examination.
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Waterworth, Sally. "Hamstring flexibility : measurement, stretching and injury susceptibility." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/40275.

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ix Flexibility has traditionally been considered an important component of human physical fitness but this conjecture lacks supporting empirical evidence. While there is extensive published research examining the relative importance of flexibility and the impact of various methods of stretching on levels of flexibility, performance and injury risk, the quality of studies has varied considerably, reliability and validity of methodology has not always been proven, and rationale has at times been questionable. Additionally, much literature has focused on static flexibility which is not necessarily related to properties of the musculotendinous unit and thus dynamic flexibility. This thesis was designed to fill gaps in the existing literature by using accepted methods to establish relative and absolute reliability of hamstring flexibility tests, consider the comparability of static and dynamic components of the global concept of flexibility and explore how dynamic flexibility and performance are influenced by fatiguing exercise and subsequent static stretching. The first aim was realised by a repeated measures study designed to establish the intraday and interday, intrarater reliability and measurement error of static and dynamic measures of hamstring flexibility. Significant relative reliability for measures of static and dynamic hamstring flexibility was demonstrated via intraclass correlation coefficient (3,1) but limits of agreement analysis indicated there was a degree of absolute measurement error that must be interpreted in relation to analytical goals. The second aim required evaluation of relationships shared by static and dynamic measures of hamstring flexibility. Significant relationships between the different static flexibility tests were established but the extent of unexplained variance indicated that only measurements from the same tests should be directly compared to each other. Relationships between different measures of dynamic flexibility and static flexibility varied from non-significant to moderately strong, suggesting that measures of static and dynamic flexibility are not identical and results should not be interchanged between the two types of tests. Due to a lack of explanatory empirical evidence, the final chapter aimed via a prospective randomised repeated measures study to investigate the impact of fatigue and post-exercise static stretching on measures of dynamic flexibility and performance. Fatigue resulted in no significant changes to passive or active dynamic flexibility measures but a significant worsening of static flexibility levels and perceived stiffness. Post-exercise stretch resulted in significantly increased passive and active energy absorption immediately and 18 hours post-exercise and in significantly reduced joint position sense immediately post-exercise. Effect sizes were small so the clinical meaningfulness of performing post-exercise static stretching is questionable, particularly if performed in place of other, potentially more beneficial practices.
Thesis (DPhil)--University of Pretoria, 2013.
gm2014
Biokinetics, Sport and Leisure Sciences
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Books on the topic "Hamstring"

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Youm, Thomas, ed. Proximal Hamstring Tears. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-56025-6.

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Thorborg, Kristian, David Opar, and Anthony Shield, eds. Prevention and Rehabilitation of Hamstring Injuries. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-31638-9.

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Kaeding, Christopher C., and James R. Borchers, eds. Hamstring and Quadriceps Injuries in Athletes. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7510-2.

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O'Sullivan, Kieran. The role of muscle strength in hamstring injury. Hauppauge, N.Y: Nova Science Publishers, 2010.

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Softball for weekend warriors: A guide to everything from pulled hamstrings to homers to happy hours. Guilford, Conn: Lyon Press, 2005.

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Anholt, Laurence. Fried Piper of Hamstring. Orchard Books, 1998.

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smithson-hutto, mary. Stretch away hamstring pain. mary Smithson-hutto, 2006.

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Smithson-Hutto, Mary. Stretch Away Hamstring Pain. Mary Smithson-Hutto, 2005.

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Quadriceps/hamstrings strength ratios and hip flexibility as predictors of hamstring injuries. 1985.

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Johnson, Jim. Bulletproof Your Hamstrings: Optimizing Hamstring Function to End Pain and Resist Injury. Dog Ear Publishing, LLC, 2016.

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Book chapters on the topic "Hamstring"

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Nanni, Gianni, Francesco Della Villa, Margherita Ricci, Diego Rizzo, and Stefano Della Villa. "Hamstring Injuries." In Arthroscopy and Sport Injuries, 97–102. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14815-1_13.

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Yang, Ajax. "Hamstring Tear." In Musculoskeletal Sports and Spine Disorders, 227–29. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50512-1_50.

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Saghieh, Said. "Hamstring Lengthening." In Operative Dictations in Orthopedic Surgery, 33–34. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7479-1_9.

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Ballis, Rosa, Bujar H. Shabani, and Dafina Bytyqi. "Hamstring Harvest." In Atlas of Orthopaedic Surgical Approaches to the Lower Limbs, 45–47. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07723-4_12.

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Napolitano, Jonathan, and Atul Gupta. "Hamstring Injury." In Common Pediatric Knee Injuries, 157–69. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55870-3_18.

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Bisciotti, Gian Nicola, L. Pulici, A. Quaglia, A. Orgiani, L. Balzarini, P. Felisaz, and Piero Volpi. "Hamstring Syndrome." In The Lower Limb Tendinopathies, 127–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33234-5_8.

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Melegati, Gianluca, and Davide Tornese. "Hamstring Injuries." In Football Traumatology, 77–91. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18245-2_9.

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Lin, Lawrence J., and Robert J. Meislin. "Functional Anatomy of the Hamstrings." In Proximal Hamstring Tears, 1–10. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56025-6_1.

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Kirby, David. "Biological Treatment of Proximal Hamstring Tendon Tears." In Proximal Hamstring Tears, 123–34. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56025-6_10.

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Manjunath, Amit K. "Rehabilitation After Surgery for Proximal Hamstring Tendon Tears." In Proximal Hamstring Tears, 135–42. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56025-6_11.

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Conference papers on the topic "Hamstring"

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Rehorn, Michael R., and Silvia S. Blemker. "3D Finite Element Modeling of the Biceps Femoris Muscle." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206695.

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Hamstring strain injury is a significant problem for many athletes [1]. Muscle-tendon (MT) length changes and activation patterns during the sprinting cycle likely contribute to the high risk of injury. It has been suggested that injury may occur during the late swing phase of the sprinting cycle when the hamstring fibers experience activated muscle lengthening [2]. Of the hamstrings muscles, the biceps femoris longhead (BFLH) is the most commonly injured, with the injury most frequently localized along the proximal muscle-tendon junction [3]. We hypothesize that the injuries are localized in this region because it is also the area of highest localized strains.
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Georgiev, Yordan, Nezabravka Gencheva, and Todor Marinov. "RESEARCH OF HAMSTRINGS MUSCLES IN CHILDREN SPORTS KARATE." In INTERNATIONAL SCIENTIFIC CONGRESS “APPLIED SPORTS SCIENCES”. Scientific Publishing House NSA Press, 2022. http://dx.doi.org/10.37393/icass2022/162.

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ABSTRACT The functional disorder of the hamstrings muscles is associated with prolonged sitting in a chair, poor posture, lack of motor activity and others. Maintaining elastic muscle tissue is an important factor for children practicing martial arts; karate in particular. This study has the purpose to examine hamstring muscles and their condition in children practicing karate. Methodology During the period between March - May 2022, we worked with 30 children in total, in the age group between 8-10 years old, who were practicing karate or boxing in clubs “Fighters”, located in the city of Varna, and club “Khan Krum”, located in the city of Shumen, respectively. For most accurate results, we formed two separate groups with 15 children each. The participants in our control group were training boxing, whilst the children in our experimental group were practicing karate. All 30 children had been training for a period of 6 months, practicing 2 times per week, one astronomical hour per session. At the beginning of every training session with our experimental group, we treated the hamstring muscles of the participants with post-isometric relaxation. To conclude our findings, we assessed the condition of the hamstring muscles of all 30 children at the beginning and end of the study period, utilizing the method of Laseg and a Seat Test with outstretched legs on the floor with a slope to the toes. Results The results at the end of the study period show that the functional deficit of the hamstring muscles continues to be present in 11 children training boxing. In comparison, only five out of 11 initially diagnosed children with hamstring muscle imbalance from our experimental group showed signs of no improvement. Conclusion The results of this study prove the hypothesis that practicing karate with the inclusion of PIR leads to improved elasticity of the hamstring muscles. The proper selection of physiotherapeutic methods and their regular application could not only heal hamstring muscle stiffness but it could also prevent it, if applied from an early age.
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Ghufroni, Afif, and Jasmine Kartiko Pertiwi. "Effectiveness of Muscle Energy Technique to Increase Hamstring Muscle Flexibility in Adolescents." In The 7th International Conference on Public Health 2020. Masters Program in Public Health, Universitas Sebelas Maret, 2020. http://dx.doi.org/10.26911/the7thicph.02.29.

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Background: Shortening of the hamstring muscles results in pain, limited range of motion, postural instability, and abnormal gait, which effect on daily activities. Muscle energy technique provides a solution to shortening the hamstring muscles by improving muscle flexibility. This study aimed to examine the effectiveness of muscle energy technique in increasing hamstring muscle flexibility in adolescents. Subjects and Method: This was a quasi-experiment pretest-posttest without a control group conducted at No. 1 High School Jogonalan, Klaten, Central Java in April 2018. A total of 30 students was selected with purposive sampling method in which one student dropped out. The dependent variable was flexibility of hamstring muscle. The independent variable was muscle energy technique training. The flexibility of hamstring muscle was measured by back saver sit and reach test. Data were analyzed by Wilcoxon test. Results: Flexibility of hamstring muscle was higher after muscle energy technique (Mean= 39.92; SD= 4.24) than before (Mean= 30.14; SD= 3.59), and it was statistically significant (p <0.001). Conclusion: Muscle energy technique increases flexibility of hamstring muscle. Muscle exercise technique can be used to improve hamstring muscle flexibility. Keywords: muscle energy technique, flexibility, hamstring muscle, adolescents Correspondence: Afif Ghufroni. Physiotherapy Study Program, School of Health Polytechnics, Surakarta, Indonesia. Email: apip.physio@gmail.com. Mobile: +6285725000769. DOI: https://doi.org/10.26911/the7thicph.02.29
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Elias, John J., Surya P. Rai, David M. Weinstein, and William J. Ciccone. "Characterizing the Influence of Preconditioning on Initial Tension for Hamstring Tendon and Patella Tendon Grafts." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-172333.

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The primary goal of ACL reconstruction is to limit post-operative anterior knee laxity without over-constraining the knee. For both hamstring tendon and patella tendon grafts used for ACL reconstruction, initial graft tension is applied to limit post-operative knee laxity. Both types of graft stress relax following implantation, decreasing the graft tension. Previous studies have shown that preconditioning reduces the tension decrease due to stress relaxation for both hamstring tendons [1] and patella tendons [2]. While hamstring tendon grafts are typically preconditioned in tension on a graft board prior to implantation to limit stress relaxation, patella tendon grafts are typically implanted without preconditioning. The current study focused on characterizing the influence of preconditioning on stress relaxation for both types of graft. The authors hypothesized that the tension loss due to stress relaxation would be larger for preconditioned hamstring tendon grafts than for preconditioned patella tendon grafts.
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Ahmed, Ahmed. "Does Prior Hamstring Strain Injury Affect Hamstring Muscle Activation Patterns in Amateur Football Players? A Feasibility Study." In 8th International Conference on Sport Sciences Research and Technology Support. SCITEPRESS - Science and Technology Publications, 2020. http://dx.doi.org/10.5220/0010117702170222.

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K, Sivasubramaniam, and Gunawardene N. "COMPARING HAMSTRING FLEXIBILITY BETWEEN THE TRANSTIBIAL PROSTHETIC WEARERS AND THE CONTROL SUBJECTS AND ASSESSING FACTORS ASSOCIATED WITH HAMSTRING FLEXIBILITY." In World Disability and Rehabilitation Conference. TIIKM, 2017. http://dx.doi.org/10.17501/wdrc.2016.1109.

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Sivasubramaniam, K. "COMPARING HAMSTRING FLEXIBILITY BETWEEN THE TRANSTIBIAL PROSTHETIC WEARERS AND THE CONTROL SUBJECTS AND ASSESSING FACTORS ASSOCIATED WITH HAMSTRING FLEXIBILITY." In World Disability & Rehabilitation Conference. TIIKM, 2016. http://dx.doi.org/10.17501/wdrc2016-1109.

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Bong, David Andrew. "SP0100 US OF THE HAMSTRING – CLINICAL APPLICATION + DEMO." In Annual European Congress of Rheumatology, EULAR 2019, Madrid, 12–15 June 2019. BMJ Publishing Group Ltd and European League Against Rheumatism, 2019. http://dx.doi.org/10.1136/annrheumdis-2019-eular.8432.

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Almeer, G., C. Azzopardi, D. Beale, S. L. James, and R. Botchu. "Proximal Hamstring Origin Architecture: Defining the Vector Angle." In ESSR 2020 Virtual Meeting. Thieme Medical Publishers, Inc., 2020. http://dx.doi.org/10.1055/s-0040-1722503.

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He, Lawrence. "Hamstring Injury Detection Using Body-Centric Nano Networks." In 2022 IEEE Integrated STEM Education Conference (ISEC). IEEE, 2022. http://dx.doi.org/10.1109/isec54952.2022.10025030.

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Reports on the topic "Hamstring"

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Tan, Haoyin, Chujie Haoyin, Bin L, and Xin W. Reconstruction of anterior cruciate ligament with hamstring tendon versus allogeneic tendon: A meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2021. http://dx.doi.org/10.37766/inplasy2021.5.0111.

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McCallum, Ryan R. The Interagency: Evolving a Hamstrung and Broken" System?". Fort Belvoir, VA: Defense Technical Information Center, May 2013. http://dx.doi.org/10.21236/ada588014.

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