Shoulder muscle fatigue development in young and older female adults during a repetitive manual task

A new method for objective quantification of localized muscle fatigue is described. The method is based on power spectrum analysis of myoelectric signals obtained from the fatigued muscle. It permits real-time investigations and yields statistically based criteria for the occurrence of fatigue. The findings are interpreted in terms of muscle action potential conduction velocity changes and rate of the fatigue development.

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Scapular kinematic and shoulder muscle activity alterations after serratus anterior muscle fatigue

Journal of Shoulder and Elbow Surgery ◽

10.1016/j.jse.2018.01.009 ◽

2018 ◽

Vol 27 (7) ◽

pp. 1205-1213 ◽

Cited By ~ 2

Author(s):

Jun Umehara ◽

Ken Kusano ◽

Masatoshi Nakamura ◽

Katsuyuki Morishita ◽

Satoru Nishishita ◽

...

Keyword(s):

Muscle Fatigue ◽

Muscle Activity ◽

Serratus Anterior Muscle ◽

Serratus Anterior ◽

Shoulder Muscle

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Electrophysiologic evaluation of muscle fatigue development and recovery in late polio

Archives of Physical Medicine and Rehabilitation ◽

10.1016/s0003-9993(00)90109-6 ◽

2000 ◽

Vol 81 (6) ◽

pp. 770-776 ◽

Cited By ~ 10

Author(s):

Katharina Stibrant Sunnerhagen ◽

Ulrika Carlsson ◽

Arne Sandberg ◽

Erik Stålberg ◽

Marita Hedberg ◽

...

Keyword(s):

Muscle Fatigue ◽

Fatigue Development

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Effects of shoulder muscle fatigue caused by repetitive overhead activities on scapulothoracic and glenohumeral kinematics

Journal of Electromyography and Kinesiology ◽

10.1016/j.jelekin.2005.06.015 ◽

2006 ◽

Vol 16 (3) ◽

pp. 224-235 ◽

Cited By ~ 126

Author(s):

D. David Ebaugh ◽

Philip W. McClure ◽

Andrew R. Karduna

Keyword(s):

Muscle Fatigue ◽

Shoulder Muscle

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Effects of String Stiffness on Muscle Fatigue After a Simulated Tennis Match

Journal of Applied Biomechanics ◽

10.1123/jab.2013-0065 ◽

2014 ◽

Vol 30 (3) ◽

pp. 401-406 ◽

Cited By ~ 2

Author(s):

Jean Bernard Fabre ◽

Vincent Martin ◽

Gil Borelli ◽

Jean Theurel ◽

Laurent Grélot

Keyword(s):

Resonant Frequency ◽

Muscle Fatigue ◽

Ball Speed ◽

Tennis Players ◽

High Stiffness ◽

Fatigue Development ◽

Low Stiffness ◽

Exercise Muscle ◽

Forearm Muscle ◽

Tennis Match

We tested the influence of string stiffness on the occurrence of forearm muscle fatigue during a tennis match. Sixteen tennis players performed two prolonged simulated tennis matches with low-stiffness or high-stiffness string. Before and immediately after exercise, muscle fatigability was evaluated on the forearm muscles during a maximal intermittent gripping task. Groundstroke ball speeds and the profile of acceleration of the racquet frame at collision were recorded during each match. The peak-to-peak amplitude of acceleration and the resonant frequency of the frame were significantly greater with high- (5060 ± 1892 m/s2and 204 ± 29 Hz, respectively) than with low-stiffness string (4704 ± 1671 m/s2and 191 ± 16 Hz, respectively). The maximal and the averaged gripping forces developed during the gripping task were significantly reduced after the tennis match with high- (−15 ± 14%, and −22 ± 14%, respectively), but not with low-stiffness string. The decrease of ball speed during the simulated matches tended to be greater with high- than with low-stiffness string (P= .06). Hence, playing tennis with high-stiffness string promotes forearm muscle fatigue development, which could partly contribute to the groundstroke ball speed decrement during the game.

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