Academic literature on the topic 'Muscle-tendon behaviour'
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Journal articles on the topic "Muscle-tendon behaviour"
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Bonacci, Jason, Wayne Spratford, Claire Kenneally-Dabrowski, Danielle Trowell, and Adrian Lai. "The effect of footwear on mechanical behaviour of the human ankle plantar-flexors in forefoot runners." PLOS ONE 17, no. 9 (September 19, 2022): e0274806. http://dx.doi.org/10.1371/journal.pone.0274806.
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Purpose To compare the ankle plantar-flexor muscle-tendon mechanical behaviour during barefoot and shod forefoot running. Methods Thirteen highly trained forefoot runners performed five overground steady-state running trials (4.5 ± 0.5 m.s-1) while barefoot and shod. Three-dimensional kinematic and ground reaction force data were collected and used as inputs for musculoskeletal modelling. Muscle-tendon behaviour of the ankle plantar-flexors (soleus; medial gastrocnemius; and lateral gastrocnemius) were estimated across the stance phase and compared between barefoot and shod running using a two-way multivariate analysis of variance. Results During barefoot running peak muscle-tendon unit (MTU) power generation was 16.5% (p = 0.01) higher compared to shod running. Total positive MTU work was 18.5% (p = 0.002) higher during barefoot running compared to shod running. The total sum of tendon elastic strain energy was 8% (p = 0.036) greater during barefoot compared to shod running, however the relative contribution of tendon and muscle fibres to muscle-tendon unit positive work was not different between conditions. Conclusion Barefoot forefoot running demands greater muscle and tendon work than shod forefoot running, but the relative contribution of tendon strain energy to overall muscle-tendon unit work was not greater.
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Fukunaga, Tetsuo, Keitaro Kubo, Yasuo Kawakami, Senshi Fukashiro, Hiroaki Kanehisa, and Constantinos N. Maganaris. "In vivo behaviour of human muscle tendon during walking." Proceedings of the Royal Society of London. Series B: Biological Sciences 268, no. 1464 (February 7, 2001): 229–33. http://dx.doi.org/10.1098/rspb.2000.1361.
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Alexander, R. McN. "Tendon elasticity and positional control." Behavioral and Brain Sciences 18, no. 4 (December 1995): 745. http://dx.doi.org/10.1017/s0140525x00040711.
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AbstractThe spring-like behaviour of a joint following a sudden change of torque is partly a result of the elastic properties of tendons. A large fall in a muscle with a long tendon may be accompanied by tendon recoil causing joint movements as large as 20°.
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Smart, Rowan R., Cydney M. Richardson, Daryl J. Wile, Brian H. Dalton, and Jennifer M. Jakobi. "Importance of Maximal Strength and Muscle-Tendon Mechanics for Improving Force Steadiness in Persons with Parkinson’s Disease." Brain Sciences 10, no. 8 (July 22, 2020): 471. http://dx.doi.org/10.3390/brainsci10080471.
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Although plantar flexion force steadiness (FS) is reduced in persons with Parkinson’s disease (PD), the underlying causes are unknown. The aim of this exploratory design study was to ascertain the influence of maximal voluntary contraction (MVC) force and gastrocnemius-Achilles muscle-tendon unit behaviour on FS in persons with PD. Nine persons with PD and nine age- and sex-matched non-PD controls (~70 years, 6 females per group) performed plantar flexion MVCs and sub-maximal tracking tasks at 5, 10, 25, 50 and 75% MVC. Achilles tendon elongation and medial gastrocnemius fascicle lengths were recorded via ultrasound during contraction. FS was quantified using the coefficient of variation (CV) of force. Contributions of MVC and tendon mechanics to FS were determined using multiple regression analyses. Persons with PD were 35% weaker during MVC (p = 0.04) and had 97% greater CV (p = 0.01) with 47% less fascicle shortening (p = 0.004) and 38% less tendon elongation (p = 0.002) than controls. Reduced strength was a direct contributor to lower FS in PD (ß = 0.631), and an indirect factor through limiting optimal muscle-tendon unit interaction. Interestingly, our findings indicate an uncoupling between fascicle shortening and tendon elongation in persons with PD. To better understand limitations in FS and muscle-tendon unit behavior, it is imperative to identify the origins of MVC decrements in persons with PD.
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Monte, Andrea, Constantinos Maganaris, Vasilios Baltzopoulos, and Paola Zamparo. "The influence of Achilles tendon mechanical behaviour on “apparent” efficiency during running at different speeds." European Journal of Applied Physiology 120, no. 11 (August 25, 2020): 2495–505. http://dx.doi.org/10.1007/s00421-020-04472-9.
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Abstract Purpose We investigated the role of elastic strain energy on the “apparent” efficiency of locomotion (AE), a parameter that is known to increase as a function of running speed (up to 0.5–0.7) well above the values of “pure” muscle efficiency (about 0.25–0.30). Methods In vivo ultrasound measurements of the gastrocnemius medialis (GM) muscle–tendon unit (MTU) were combined with kinematic, kinetic and metabolic measurements to investigate the possible influence of the Achilles tendon mechanical behaviour on the mechanics (total mechanical work, WTOT) and energetics (net energy cost, Cnet) of running at different speeds (10, 13 and 16 km h−1); AE was calculated as WTOT/Cnet. Results GM fascicles shortened during the entire stance phase, the more so the higher the speed, but the majority of the MTU displacement was accommodated by the Achilles tendon. Tendon strain and recoil increased as a function of running speed (P < 0.01 and P < 0.001, respectively). The contribution of elastic energy to the positive work generated by the MTU also increased with speed (from 0.09 to 0.16 J kg−1 m−1). Significant negative correlations (P < 0.01) were observed between tendon work and metabolic energy at each running speed (the higher the tendon work the lower the metabolic demand) and significant positive correlations were observed between tendon work and AE (P < 0.001) at each running speed (the higher the tendon work the higher the efficiency). Conclusion These results support the notion that the dynamic function of tendons is integral in reducing energy expenditure and increasing the “apparent” efficiency of running.
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Werkhausen, Amelie, Neil J. Cronin, Kirsten Albracht, Gøran Paulsen, Askild V. Larsen, Jens Bojsen-Møller, and Olivier R. Seynnes. "Training-induced increase in Achilles tendon stiffness affects tendon strain pattern during running." PeerJ 7 (April 24, 2019): e6764. http://dx.doi.org/10.7717/peerj.6764.
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Background During the stance phase of running, the elasticity of the Achilles tendon enables the utilisation of elastic energy and allows beneficial contractile conditions for the triceps surae muscles. However, the effect of changes in tendon mechanical properties induced by chronic loading is still poorly understood. We tested the hypothesis that a training-induced increase in Achilles tendon stiffness would result in reduced tendon strain during the stance phase of running, which would reduce fascicle strains in the triceps surae muscles, particularly in the mono-articular soleus. Methods Eleven subjects were assigned to a training group performing isometric single-leg plantarflexion contractions three times per week for ten weeks, and another ten subjects formed a control group. Before and after the training period, Achilles tendon stiffness was estimated, and muscle-tendon mechanics were assessed during running at preferred speed using ultrasonography, kinematics and kinetics. Results Achilles tendon stiffness increased by 18% (P < 0.01) in the training group, but the associated reduction in strain seen during isometric contractions was not statistically significant. Tendon elongation during the stance phase of running was similar after training, but tendon recoil was reduced by 30% (P < 0.01), while estimated tendon force remained unchanged. Neither gastrocnemius medialis nor soleus fascicle shortening during stance was affected by training. Discussion These results show that a training-induced increase in Achilles tendon stiffness altered tendon behaviour during running. Despite training-induced changes in tendon mechanical properties and recoil behaviour, the data suggest that fascicle shortening patterns were preserved for the running speed that we examined. The asymmetrical changes in tendon strain patterns supports the notion that simple in-series models do not fully explain the mechanical output of the muscle-tendon unit during a complex task like running.
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Lai, Adrian, Anthony G. Schache, Nicholas A. T. Brown, and Marcus G. Pandy. "Human ankle plantar flexor muscle–tendon mechanics and energetics during maximum acceleration sprinting." Journal of The Royal Society Interface 13, no. 121 (August 2016): 20160391. http://dx.doi.org/10.1098/rsif.2016.0391.
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Tendon elastic strain energy is the dominant contributor to muscle–tendon work during steady-state running. Does this behaviour also occur for sprint accelerations? We used experimental data and computational modelling to quantify muscle fascicle work and tendon elastic strain energy for the human ankle plantar flexors (specifically soleus and medial gastrocnemius) for multiple foot contacts of a maximal sprint as well as for running at a steady-state speed. Positive work done by the soleus and medial gastrocnemius muscle fascicles decreased incrementally throughout the maximal sprint and both muscles performed more work for the first foot contact of the maximal sprint (FC1) compared with steady-state running at 5 m s −1 (SS5). However, the differences in tendon strain energy for both muscles were negligible throughout the maximal sprint and when comparing FC1 to SS5. Consequently, the contribution of muscle fascicle work to stored tendon elastic strain energy was greater for FC1 compared with subsequent foot contacts of the maximal sprint and compared with SS5. We conclude that tendon elastic strain energy in the ankle plantar flexors is just as vital at the start of a maximal sprint as it is at the end, and as it is for running at a constant speed.
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Bohm, Sebastian, Falk Mersmann, Alessandro Santuz, and Adamantios Arampatzis. "Enthalpy efficiency of the soleus muscle contributes to improvements in running economy." Proceedings of the Royal Society B: Biological Sciences 288, no. 1943 (January 27, 2021): 20202784. http://dx.doi.org/10.1098/rspb.2020.2784.
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During human running, the soleus, as the main plantar flexor muscle, generates the majority of the mechanical work through active shortening. The fraction of chemical energy that is converted into muscular work (enthalpy efficiency) depends on the muscle shortening velocity. Here, we investigated the soleus muscle fascicle behaviour during running with respect to the enthalpy efficiency as a mechanism that could contribute to improvements in running economy after exercise-induced increases of plantar flexor strength and Achilles tendon (AT) stiffness. Using a controlled longitudinal study design ( n = 23) featuring a specific 14-week muscle–tendon training, increases in muscle strength (10%) and tendon stiffness (31%) and reduced metabolic cost of running (4%) were found only in the intervention group ( n = 13, p < 0.05). Following training, the soleus fascicles operated at higher enthalpy efficiency during the phase of muscle–tendon unit (MTU) lengthening (15%) and in average over stance (7%, p < 0.05). Thus, improvements in energetic cost following increases in plantar flexor strength and AT stiffness seem attributed to increased enthalpy efficiency of the operating soleus muscle. The results further imply that the soleus energy production in the first part of stance, when the MTU is lengthening, may be crucial for the overall metabolic energy cost of running.
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Waugh, Charlie M., Thomas Korff, and Anthony J. Blazevich. "Developmental differences in dynamic muscle–tendon behaviour: implications for movement efficiency." Journal of Experimental Biology 220, no. 7 (January 20, 2017): 1287–94. http://dx.doi.org/10.1242/jeb.127951.
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Kanazawa, Hiroshi, Yukio Urabe, and Taizan Shirakawa. "Behaviour of the muscle-tendon unit during static stretching following unloading." International Journal of Therapy and Rehabilitation 17, no. 3 (March 2010): 132–42. http://dx.doi.org/10.12968/ijtr.2010.17.3.46745.
Full textDissertations / Theses on the topic "Muscle-tendon behaviour"
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Galantis, Apostolos. "Contractile and elastic behaviour of human muscle-tendon complexes with inertial loading." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269846.
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Farris, Dominic James. "In vivo assessment of the elastic behaviour of the triceps surae muscle-tendon-complex : implications for achilles tendon injury." Thesis, University of Bath, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520825.
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Wullems, Jorgen Antonin. "The influence of sedentary behaviour on muscle-tendon properties and resultant postural balance in older adults." Thesis, Manchester Metropolitan University, 2018. http://e-space.mmu.ac.uk/620938/.
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In recent years, sedentary behaviour (SB) has been identified as a health risk, independent of physical activity (PA). With the population becoming increasingly sedentary, detailed analysis of its effects is required. It is proposed that in the elderly, arguably the most sedentary age group, SB might adversely affect musculoskeletal health hence leading to poorer physical functioning, less independence and higher risk of falling. Hence, this thesis aimed to study the associations between SB and muscle-tendon properties in older adults (aged ≥60 years). To do so, a machine learning algorithm was applied onto thigh-mounted accelerometry data. Algorithm performance was acceptable for a wide spectrum of physical activity intensities, and its concurrent validity was good. Then, a cross-sectional study on 105 older adults included a 7-day habitual activity monitoring week, and assessed gastrocnemius medialis (GM) muscle-tendon morphology, architecture, function, fatigue indices, mechanical and material properties, and postural balance. From the accelerometer data, both total amount and patterns of SB were extracted. Analysis of these outcomes ranged from simple comparison of general SB levels to compositional data analysis. Multiple linear regression models showed a few associations linking SB with detrimental outcomes with GM muscle properties (dimension, strength and force). Similarly, isotemporal substitution yielded a limited number of significant potential relative effects of SB behaviour alterations. GM tendon mechanical, material and morphological properties also showed associations. Interestingly, negative associations between SB and postural balance in this group of older adults were also identified. Overall, this thesis presents novel data from detailed analyses on SB and intrinsic muscle-tendon properties in older adults. Regardless of the somewhat limited associations between sleep and PA-independent SB outcomes and GM muscle-tendon properties in older adults, the negative relationship with a task associated with habitual physical independence (i.e. postural balance) warrants further investigation of SB in elderly.
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Earp, Jacob. "The influence of external loading and speed of movement on muscle-tendon unit behaviour and its implications for training." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/533.
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In this thesis great emphasis has been placed on vastus lateralis (VL) muscle-tendon unit (MTU) structure, behaviour/movement and adaptation. Of particular interest was how external loading and movement speed influence these variables. In the first study (Chapter 3) we developed a new methodology by which electromyography (EMG) could be normalised during large range of motion knee extensions. This methodology was then used as part of a larger study, which investigated how external loading influenced the interaction of muscle and tendon (MTU behaviour) during stretch shortening cycle isoinertial knee extensions, and how muscle activity and intrinsic tendon force (Ft) influenced MTU behaviour (Chapter 4). In this study it was observed that as external loading increased the tendon strain decreased despite muscle activity and Ft increasing. It was concluded that the rapid rate of Ft development (RFDt) and speed of movement resulted in an increase in tendon stiffness that was neglected additional strain that is normally associated with increased load/force.
We then investigated how external loading influenced MTU behaviour during parallel depth jump squats (JS-P), which is a more complex but also more commonly performed movement (Chapter 5). Our findings in this study contrasted those of our previous study in that we observed tendon strain increased as external loading increased. Further investigation revealed that while peak Ft increased and movement velocity decreased with increased loading intensity, the RFDt through the tendon did not significantly increase with external loading. In addition, when comparing the results from this study to those of the previous study it was found that the peak RFDt observed during heavy squat jumps was a fraction of the value observed during heavy leg extensions. These results led us to the conclusion that the RFDt that is the primary determinate of MTU behaviour and the influence of loading on MTU behaviour varies between tasks.
In our next study we investigated how speed of movement influences MTU behaviour during parallel depth squatting-type movements (Chapter 6). In this study it was observed that the influence of speed of movement had on MTU behaviour differed between the eccentric and concentric phases. Specifically, it was observed that during initial tendon loading the tendon went through less strain when the movement was performed at faster speeds, however, late in the movement tendon strain increased with increased movement speed. Further investigation revealed that during initial tendon loading RFDt significantly increased with increasing movement speeds, which resulted in the viscoelastic properties of the tendon to predominate the movement. However, late in the movement when relative differences in RFDt were small the tendon behaved as a predominately elastic structure. The results from this study along with the studies prior highlighted that changing either the external load or the speed at which the load it lifted can vastly influence of the VL-MTU behaviour.
In the final study of this thesis we compared the training specific structural and mechanical adaptations to slow-speed, high-load (SHL) squat training to determine how this might differ to relatively fast-speed, light-load (FLL) jump squat training (Chapter 7). In this study we observed that both groups significantly increased their strength, the cross sectional area of their quadriceps muscles, and the fascicle length of their VL. However, only subjects in the SHL group were able to increase the stiffness of their quadriceps tendon and only subjects in the FLL group increased their VL fascicle angle. It is believed that the observed training specific adaptations resulted from previously observed differences in MTU behaviour, intrinsic forces, and muscle activity observed in the previous studies. Because of this it is concluded that intentional manipulation of external load and speed of movement are viable ways to target specific muscular and tendinous adaptations. The results of this thesis has potential practical applications for designing training programs for athletes and sets the stage for further investigation into how these variables can be manipulated for prevention and rehabilitation of musculotendinous injuries.
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Karamanidis, Kiros [Verfasser]. "Motor behaviour during sudden perturbation and repetitive non-strategic tasks in consideration of muscle-tendon unit capacities: effects of aging and running / Kiros Karamanidis." Köln : Deutsche Sporthochschule Köln, 2006. http://d-nb.info/1070537500/34.
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Penailillo, Luis. "Muscle damage and metabolic profiles of eccentric cycling." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/706.
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Eccentric cycling, in which the knee extensor muscles perform eccentric contractions while trying to brake the backward rotational movements of the cranks of a cycle ergometer, has been shown to effectively increase muscle function and volume with a low metabolic cost. However, acute responses to repeated eccentric cycling bouts have not been well documented. Thus, the primary purposes of this PhD project were to investigate muscle damage and metabolic profiles of eccentric cycling in comparison to concentric cycling (Studies 1-3), and muscle-tendon behaviour (Study 4) during eccentric cycling in relation to muscle damage.
Study 1 compared muscle damage and metabolic profiles between a bout of concentric cycling (CONC) and two bouts of eccentric cycling (ECC1, ECC2) performed by 10 healthy men (28 ± 8 y), with a 2-wk interval between bouts. All cycling bouts were performed for 30 min at 60% of CONC maximal power output (POmax). Heart rate (HR), oxygen consumption, blood lactate (BLa) and rate of perceived exertion were 19-65% lower during ECC1 than CONC, and HR and BLa were 12-35% lower during ECC2 than ECC1. Exercise-induced decreases in knee extensor maximal voluntary contraction (MVC) torque and vertical jump height as well as increases in muscle soreness were significantly greater after ECC1 than CONC and ECC2, and no significant changes in these variables were found one day after CONC and ECC2. It was concluded that eccentric cycling was less metabolically demanding than CONC, and muscle damage was minimal after the second eccentric cycling bout.
Study 2 examined fat and carbohydrate utilisation during and immediately after cycling, and resting energy expenditure before and both 2 and 4 days post-cycling using indirect calorimetry. An oral glucose tolerance test was performed before, and 1 and 3 days post-cycling. Fat utilisation was greater during ECC1 (72%) and ECC2 (85%) than CONC, and was 48% greater during ECC2 than ECC1. Post-exercise energy expenditure and fat utilisation were less after ECC1 than CONC (30% and 52%, respectively), but similar between CONC and ECC2. Glucose uptake increased 3 days post-ECC1. These results suggest greater fat utilisation during and after eccentric than concentric cycling without glucose uptake impairment.
Study 3 tested the hypothesis that rate of force development (RFD) would be a more sensitive marker of muscle damage than MVC torque by comparing the changes in MVC torque and RFD after CONC, ECC1 and ECC2. Decreases in MVC torque were significantly greater immediately and 1-2 days after ECC1 than CONC and ECC2. RFD decreased immediately after all cycling bouts, but RFD measured in the interval 100-200 ms (RFD100-200) decreased at all time points after ECC1 (24-32%) as well as immediately after ECC2 (23%), but did not change after CONC. The magnitude of decrease in RFD100-200 after ECC1 was 7-19% greater than MVC torque. These suggest that RFD100-200 is a more specific and sensitive marker of eccentric exercise-induced muscle damage than MVC torque.
To investigate the mechanisms underpinning the repeated bout effect in eccentric cycling, Study 4 examined the hypothesis that vastus lateralis muscle-tendon behaviour would be different between two (i.e. repeated) eccentric cycling bouts. Eleven healthy men (27.1 ± 7.0 y) performed 10 min of eccentric cycling at 65% of CONC POmax twice (ECC1, ECC2) separated by 2 weeks. Greater muscle soreness was developed 1-2 days after ECC1 than ECC2. Electromyogram and crank torque were similar between bouts, but the magnitude of fascicle elongation during ECC2 was 16% smaller than ECC1. These results suggest that smaller elongation of fascicles was associated with less muscle soreness after ECC2, and possibly the repeated bout effect.
These studies revealed the muscle damage profile of eccentric cycling, one of the potential mechanisms of the repeated bout effect, and metabolic characteristics of repeated eccentric cycling bouts. Since muscle damage is minimal and can be abolished by proper prescription, eccentric cycling may be an ideal exercise for elderly and frail individuals with impaired muscle oxidative function (e.g. diabetes and chronic obstructive pulmonary disease). Further studies are warranted in these populations.
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Ho, Chih-Chiao, and 何智巧. "Effect of eccentric exercise-induced muscle damage of the elbow flexors on changes in muscle-tendon behaviour." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/44972630053400707573.
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碩士國立臺灣師範大學
體育學系
103
BACKGROUND: It is well-documented that eccentric exercise of the elbow flexors results in significant muscle damage, but it is not known whether eccentric exercise-induced muscle damage (EIMD) would be involved with changes in muscle-tendon behaviour of the damaged muscles. PURPOSE: To test the hypothesis that changes in muscle-tendon behaviour following a single bout of maximal eccentric exercise would be associated with EIMD. METHODS: Twenty untrained young men performed 5 x 6 maximal isokinetic (30°/s) eccentric contractions of the elbow flexors of the non-dominant arm to induce muscle damage. Changes in upper arm circumference (CIR), muscle soreness (SOR), relaxed elbow joint angle (RANG), plasma creatine kinase activity (CK), and muscle-tendon behaviour of the long head of biceps brachii of real-time B-mode ultrasound scanning images were taken before, immediately after, and for 5 consecutive days after exercise. Data were compared by repeated-measures of One-way ANOVA repeated measures and Pearson product-moment correlation coefficient. RESULTS: All dependent variables showed significant changes following eccentric exercise compared with baseline levels (p <.05). The maximal changes in muscle-tendon behaviour after eccentric exercise had a correlation with peak-CIR (r = -.79), peak-CK (r = -.50), peak-SOR (r = -.72) and lowest-RANG (r = .76; p <.05). CONCLUSIONS: These results suggested that eccentric exercise induced not only significant muscle damage, but also changes in muscle-tendon behaviour. It appears that changes in muscle-tendon behaviour are likely to be reflected in the magnitude of EIMD.
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Yi-HsienLiu and 劉怡嫻. "Effect of Muscle Fatigue on Biomechanical Behavior of Common Extensor Tendon." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/53157221752435451902.
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碩士國立成功大學
生物醫學工程學系
102
Tendons play an important role in human movements because it connects muscle and bone. The main function is to transfer the force produced by the muscle to move and stabilize joints. However, tendinopathy is a common musculoskeletal disorder, especially tennis elbow (lateral epicondylitis) which is the most common one upper extremity tendinopathy disorder. Patients with tennis elbow experience pain associated with wrist movements or tenderness over the lateral epicondyle of the humerus. The possible injury mechanism for this disease might be sudden impact of overload on the involved muscle/tendon or cumulative microtrauma from repetitive loading on the wrist extensors. In order to understand the disease factor of tennis elbow, this study used a muscle fatigue model to simulate overuse of the wrist extensor muscle via a custom isokinetic dynamometer of the wrist joint and provided the functions to control muscle contraction mode and wrist deviation angle. The aim of this study is to investigate the performance of muscle strength, muscle activity in healthy subjects during different wrist deviations (neutral/ radial deviation/ ulnar deviation) and muscle contraction types (isometric/ concentric/ eccentric) after wrist extensor fatigue. Also, this study will help to understand the biomechanical behavior of common extensor tendon such as tendon stiffness between healthy subjects and muscle fatigue. The results showed that, after the muscle fatigue, the strength of wrist extensors, the root mean square of muscle activity and tendon stiffness were reduced. The wrist extensor muscle strength in neutral wrist position was significantly greater than radial and ulnar deviation of wrist joint. In addition, whether in different contraction types, the muscle activity was significantly decreased in comparison with wrist neutral position. The tendon stiffness also significantly decreased in wrist deviations. Based on the above mentioned, the condition of wrist extensor muscle fatigue or overuse and during the movements in wrist deviations, which not only decrease muscle strength but also decrease of tendon stiffness, it result in tendon has more displacement to transfer the same tendon force. The findings indicate that the possible injury may result from the fatigue or overuse, especially in eccentric movements or in radial deviation of wrist joint. In conclusion, this study applies the mechanical design, imaging technology and clinical setting to investigate the fatigue mechanism of muscle/tendon and the factors of tendon injury or muscle damage. In the future, further studies can find the injury mechanisms of tendons and establish more objective evidences to give assistance in clinical diagnosis to improve therapy, or develop a functional outcome measurement and apply it to evaluate effectiveness of interventions.
Books on the topic "Muscle-tendon behaviour"
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Nicholls, Sarah Louise. The development of simple mathematical models to describe the mechanical behaviour of a human muscle-tendon complex. Birmingham: University of Birmingham, 1994.
Find full textBook chapters on the topic "Muscle-tendon behaviour"
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Tsui, Chi Pong, Chak Yin Tang, Chi Loong Chow, S. C. Hui, and Y. L. Hong. "Active Finite Element Method for Simulating the Contraction Behavior of a Muscle-Tendon Complex." In Macro-, Meso-, Micro- and Nano-Mechanics of Materials, 9–14. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-979-2.9.
Full textConference papers on the topic "Muscle-tendon behaviour"
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Piovesan, Davide, Alberto Pierobon, and Ferdinando A. Mussa-Ivaldi. "Third-Order Muscle Models: The Role of Oscillatory Behavior in Force Control." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88081.
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This paper presents the analysis of a third-order linear differential equation representing a muscle-tendon system, including the identification of critical damping conditions. We analytically verified that this model is required for a faithful representation of muscle-skeletal muscles and provided numerical examples using the biomechanical properties of muscles and tendon reported in the literature. We proved the existence of a theoretical threshold for the ratio between tendon and muscle stiffness above which critical damping can never be achieved, thus resulting in an oscillatory free response of the system, independently of the value of the damping. Oscillation of the limb can be compensated only by active control, which requires creating an internal model of the limb mechanics. We demonstrated that, when admissible, over-damping of the muscle-tendon system occurs for damping values included within a finite interval between two separate critical limits. The same interval is a semi-infinite region in second-order models. Moreover, an increase in damping beyond the second critical point rapidly brings the system to mechanical instability.
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Danley, Bryan B., and Shadow Huang. "Biomechanical and Biochemical Study of Muscle-Tendon-Bone in Porcine Digital Flexor Tendon." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52360.
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The musculoskeletal system provides the body with both movement and support. In particular, contractile forces developed in the muscles are transmitted through the muscle-tendon junction (MTJ) into the tendon and then through the tendon-bone insertion into the bone. Each junction occurs between two dissimilar materials (muscle-to-tendon and tendon-to-bone) and neither is fully understood. The current study analyzes the relationship between the tissue microstructure and macro-scale biomechanical properties of the muscle-tendon-bone unit to better understand the anisotropic mechanical behavior of the tissue. Collagen content was assayed at various locations along the porcine digital flexor tendon. Collagen concentration as a percent of the wet weight in the bone end was found to be 20.4±5.2% (n=6), the mid tendon to be 20.6±5.3% (n=6), and the muscle end to be 25.2±3.6% (n=4). No statistical differences were found between these collagen concentrations. Additionally, to the best of the authors’ knowledge, this is the first study to report cross-sectional stress-strain data for the muscle-tendon-bone unit. Results indicate that the tendon cross-sectional stiffness increases from the proximal end to the distal end. However, no direction dependent anisotropies were found between the mediolateral and dorsopalmar directions. Effects of microstructural components, such as glycosaminoglycans and collagen, and phenomenon such as fibril sliding and cross-linking, are discussed in relation to the reported cross-section stress-strain response. This work provides a synergistic approach for quantifying biomechanical and biochemical properties of biological tissue, and potentially facilitates the development of tissue engineered MTJ and tendon-bone insertion.
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Shirai, Takuma, Junichi Urata, Yuto Nakanishi, Kei Okada, and Masayuki Inaba. "Whole body adapting behavior with muscle level stiffness control of tendon-driven multijoint robot." In 2011 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2011. http://dx.doi.org/10.1109/robio.2011.6181623.
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Koppes, Ryan A., and David T. Corr. "Force Recovery After Activated Stretching in Whole Skeletal Muscle: Transient Aspects of Force Enhancement." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-193222.
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The enhancement of isometric force after active stretching is a well-accepted and demonstrated characteristic of skeletal muscle in both whole muscle [1,2] and single-fiber preparations [1,3], but its mechanisms remain unknown. Although traditionally analyzed at steady-state, transient phenomena caused, at least in part, by cross-bridge kinetics may provide novel insight into the mechanisms associated with force enhancement (FE). In order to identify the transient aspects of FE and its relation to stretching speed, stretching amplitude, and muscle mechanical work, a post hoc analysis of in situ experiments in soleus muscle tendon units of anesthetized cats [2] was conducted. The period immediately following stretching, at which the force returns to steady-state, was fit using an exponential decay function. The aims of this study were to analyze and quantify the effects of stretching amplitude, stretching speed, and muscle mechanical work on steady-state force enhancement (FEss) and transient force relaxation rate after active stretching. The results of this study were interpreted with respect to prior force depression (FD) experiments [4], to identify if the two phenomena exhibited similar transient and steady-state behaviors, and thus could be described by the same underlying mechanism(s).
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Lee, Hyunglae, and Neville Hogan. "Modeling Dynamic Ankle Mechanical Impedance in Relaxed Muscle." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-5976.
Full textAbstract:
This paper presents identification and modeling of dynamic ankle mechanical impedance in relaxed muscles. A multi-variable estimation method using a wearable therapeutic robot enabled clear interpretation of dynamic ankle impedance both in the sagittal and frontal planes. Estimation results showed that dynamic ankle behavior apparently cannot be reconciled with a simple 2nd order model. Measurements in a seated and standing position verified that ankle impedance changes substantially depending on lower-limb posture. Identification results were fitted with a modified Hill model with a mass between the muscle and tendon elements. When coupled with foot inertia, either singly or antagonistically, this model successfully captured the dynamic behavior of the ankle impedance both in the seated and standing positions up to 20 Hz. At least a 4th order model having 2 complex zero and 1 complex pole pairs was required to describe relaxed ankle impedance either in the sagittal or frontal plane up to 20Hz. In the seated position, a 6th order model was slightly better than the 4th order model but with the expense of complexity, and a 8th order model might be used to describe dynamic ankle behavior up to 30∼40Hz.