Predictive Neuromuscular Fatigue of the Lower Extremity Utilizing Computer Modeling

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Michael A. Samaan ◽  
Joshua T. Weinhandl ◽  
Steven A. Hans ◽  
Sebastian Y. Bawab ◽  
Stacie I. Ringleb
Keyword(s):  
Lower Extremity ◽  
Muscle Force ◽  
Cruciate Ligament ◽  
Force Production ◽  
Neuromuscular Fatigue ◽  
Lower Extremity Injury ◽  
Muscle Forces ◽  
Flexor Muscle ◽  
Lower Extremity Muscle ◽  
Muscle Force Production

This paper studies the modeling of lower extremity muscle forces and their correlation to neuromuscular fatigue. Two analytical fatigue models were combined with a musculoskeletal model to estimate the effects of hamstrings fatigue on lower extremity muscle forces during a side step cut. One of the fatigue models (Tang) used subject-specific knee flexor muscle fatigue and recovery data while the second model (Xia) used previously established fatigue and recovery parameters. Both fatigue models were able to predict hamstrings fatigue within 20% of the experimental data, with the semimembranosus and semitendinosus muscles demonstrating the largest (11%) and smallest (1%) differences, respectively. In addition, various hamstrings fatigue levels (10–90%) on lower extremity muscle force production were assessed using one of the analytical fatigue models. As hamstrings fatigue levels increased, the quadriceps muscle forces decreased by 21% (p < 0.01), while gastrocnemius muscle forces increased by 36% (p < 0.01). The results of this study validate the use of two analytical fatigue models in determining the effects of neuromuscular fatigue during a side step cut, and therefore, this model can be used to assess fatigue effects on risk of lower extremity injury during athletic maneuvers. Understanding the effects of fatigue on muscle force production may provide insight on muscle group compensations that may lead to altered lower extremity motion patterns as seen in noncontact anterior cruciate ligament (ACL) injuries.

scholarly journals Effect of habitual foot-strike pattern on the gastrocnemius medialis muscle-tendon interaction and muscle force production during running

2019 ◽  
Vol 126 (3) ◽  
pp. 708-716 ◽  
Author(s):  
Wannes Swinnen ◽  
Wouter Hoogkamer ◽  
Tijs Delabastita ◽  
Jeroen Aeles ◽  
Friedl De Groote ◽  
...  
Keyword(s):  
Energy Demand ◽  
Muscle Force ◽  
Force Production ◽  
Metabolic Cost ◽  
Metabolic Energy ◽  
Ground Contact ◽  
Muscle Forces ◽  
Flexor Muscle ◽  
Contraction Velocity ◽  
Foot Strike

The interaction between gastrocnemius medialis (GM) muscle and Achilles tendon, i.e., muscle-tendon unit (MTU) interaction, plays an important role in minimizing the metabolic cost of running. Foot-strike pattern (FSP) has been suggested to alter MTU interaction and subsequently the metabolic cost of running. However, metabolic data from experimental studies on FSP are inconsistent, and a comparison of MTU interaction between FSP is still lacking. We, therefore, investigated the effect of habitual rearfoot and mid-/forefoot striking on MTU interaction, ankle joint work, and plantar flexor muscle force production while running at 10 and 14 km/h. GM muscle fascicles of 9 rearfoot and 10 mid-/forefoot strikers were tracked using dynamic ultrasonography during treadmill running. We collected kinetic and kinematic data and used musculoskeletal models to determine joint angles and calculate MTU lengths. In addition, we used dynamic optimization to assess plantar flexor muscle forces. During ground contact, GM fascicle shortening ( P = 0.02) and average contraction velocity ( P = 0.01) were 40–45% greater in rearfoot strikers than mid-/forefoot strikers. Differences in contraction velocity were especially prominent during early ground contact. Moreover, GM ( P = 0.02) muscle force was greater during early ground contact in mid-/forefoot strikers than rearfoot strikers. Interestingly, we did not find differences in stretch or recoil of the series elastic element between FSP. Our results suggest that, for the GM, the reduced muscle energy cost associated with lower fascicle contraction velocity in mid-/forefoot strikers may be counteracted by greater muscle forces during early ground contact. NEW & NOTEWORTHY Kinetic and kinematic differences between foot-strike patterns during running imply (not previously reported) altered muscle-tendon interaction. Here, we studied muscle-tendon interaction using ultrasonography. We found greater fascicle contraction velocities and lower muscle forces in rearfoot compared with mid-/forefoot strikers. Our results suggest that the higher metabolic energy demand due to greater fascicle contraction velocities might offset the lower metabolic energy demand due to lower muscle forces in rearfoot compared with mid-/forefoot strikers.

Does Raising Morning Rectal Temperature to Evening Levels Offset the Diurnal Variation in Muscle Force Production?

2013 ◽  
Vol 30 (4) ◽  
pp. 486-501 ◽  
Author(s):  
Ben J. Edwards ◽  
Samuel A. Pullinger ◽  
Jonathan W. Kerry ◽  
William R. Robinson ◽  
Tom P. Reilly ◽  
...  
Keyword(s):  
Diurnal Variation ◽  
Rectal Temperature ◽  
Muscle Force ◽  
Force Production ◽  
Muscle Force Production

Muscle force production and functional performance in spastic cerebral palsy: Relationship of cocontraction

2000 ◽  
Vol 81 (7) ◽  
pp. 895-900 ◽  
Author(s):  
Diane L. Damiano ◽  
Tracy L. Martellotta ◽  
Daniel J. Sullivan ◽  
Kevin P. Granata ◽  
Mark F. Abel
Keyword(s):  
Cerebral Palsy ◽  
Muscle Force ◽  
Functional Performance ◽  
Force Production ◽  
Spastic Cerebral Palsy ◽  
Relationship Of ◽  
Muscle Force Production

Single-Use Versus Multiple-Use Electrodes for Sensory and Motor Threshold Amplitudes and Muscle Force Production

2013 ◽  
Vol 5 (3) ◽  
pp. 123-128
Author(s):  
David O. Draper ◽  
Lucia Maloy ◽  
J. Ty Hopkins ◽  
A. Wayne Johnson ◽  
Dennis Eggett ◽  
...  
Keyword(s):  
Muscle Force ◽  
Force Production ◽  
Multiple Use ◽  
Motor Threshold ◽  
Single Use ◽  
Muscle Force Production

Estimation of Human Lower-Extremity Muscle Force Under Uncertainty While Rising from a Chair

2014 ◽  
Vol 38 (10) ◽  
pp. 1147-1155
Author(s):  
Young Nam Jo ◽  
Moon Jeong Kang ◽  
Je Wook Chae ◽  
Hong Hee Yoo
Keyword(s):  
Lower Extremity ◽  
Muscle Force ◽  
Lower Extremity Muscle

scholarly journals Effect of Fatigue Protocols on Upper Extremity Neuromuscular Function and Implications for Ulnar Collateral Ligament Injury Prevention

2019 ◽  
Vol 7 (12) ◽  
pp. 232596711988887 ◽  
Author(s):  
Toufic R. Jildeh ◽  
Kelechi R. Okoroha ◽  
Joseph S. Tramer ◽  
Jorge Chahla ◽  
Benedict U. Nwachukwu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Injury Prevention ◽  
Upper Extremity ◽  
Muscle Force ◽  
Force Production ◽  
Ulnar Collateral Ligament ◽  
Neuromuscular Function ◽  
Inclusion Criteria ◽  
Collateral Ligament ◽  
Muscle Force Production

Background: As the incidence of overuse injuries to the medial elbow in overhead athletes continues to rise, recent evidence suggests a link between these injuries and alterations in biomechanics produced by athlete fatigue. Previous studies have evaluated the effect of fatigue on elbow injuries using a wide array of fatigue protocols/athletic tasks, and, as a consequence, the results have been heterogeneous. Purpose: To determine whether there is a uniform alteration in neuromuscular function or biomechanics as the overhead athlete fatigues. Furthermore, this study sought to determine whether player fatigue should be accounted for in ulnar collateral ligament (UCL) injury prevention programs. Study Design: Systematic review. Methods: A systematic review of the literature using PubMed and MEDLINE databases was performed. Keywords included fatigue, upper extremity, baseball, pitcher, throwing, and muscle activity. Inclusion criteria consisted of original research articles in the English language involving healthy athletes, use of fatigue protocols, and the evaluation of at least 1 upper limb biomechanical variable. Results: A total of 35 studies involving 644 athletes (90 females, 554 males; mean age, 20.2 years) met the inclusion criteria. General fatigue protocols were used in 2 investigations, peripheral protocols were used in all 35 studies, and 5 different athletic tasks were studied (simulated baseball game, overhead throwing, high-effort swimming, simulated tennis game, and overhead serving). There was a uniform decrease in muscle force production and proprioception in athletes after completing a fatigue protocol. However, there was no consistency among studies when evaluating other important upper limb biomechanical factors. The fatigue protocols did not consistently produce statistically significant changes in elbow torque, pitching biomechanics, or ball velocity. Conclusion: A uniform decrease in muscle force production and proprioception was found after fatigue protocols; however, a majority of fatigue protocols published in the current literature are inconsistently measured and produce heterogeneous results. Therefore, currently, no recommendations can be made for changes in UCL injury prevention training programs to account for potential effects of fatigue. The effect of muscle force production and proprioception on upper extremity injuries should be evaluated in future studies.

scholarly journals The Authors Comment: Conference on “The Influence of Lower-Extremity Muscle Force on Gait Characteristics…”

1996 ◽  
Vol 76 (5) ◽  
pp. 537-538
Author(s):  
Christopher M Powers ◽  
Lara Boyd ◽  
Catherine A Fontaine ◽  
Jacquelin Perry
Keyword(s):  
Lower Extremity ◽  
Muscle Force ◽  
Gait Characteristics ◽  
Lower Extremity Muscle
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