Time Course of the Cross-Over Effect of Fatigue on the Contralateral Muscle after Unilateral Exercise
Open Access
- 31 May 2013
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 8 (5), e64910
- https://doi.org/10.1371/journal.pone.0064910
Abstract
We investigated the cross-over effect of muscle fatigue and its time course on the non-exercising contralateral limb (NEL) after unilateral fatiguing contractions of the ipsilateral exercising limb (EL). For this purpose, 15 males performed two bouts of 100-second maximal isometric knee extensions with the exercising limb, and neuromuscular function of both the EL and NEL was assessed before (PRE), after a first fatiguing exercise (MID) and after a second fatiguing exercise (POST). Maximal voluntary isometric torque production declined in the EL after the first bout of exercise (−9.6%; ppi.e., peak twitch torque, maximal rate of twitch development). According to these markers, we suggest that peripheral fatigue occurred. At POST, after the second bout of exercise, the voluntary activation level of the knee extensor muscles was altered from PRE (−9.1%; pvs. central fatigue) might contribute to the respective torque decline in the EL and the NEL. Given that our unilateral fatiguing exercise induced immediate maximal torque reduction in the EL and postponed the loss of torque production in the NEL, it is also concluded that the time course of muscle fatigue differed between limbs.Keywords
This publication has 46 references indexed in Scilit:
- Unraveling the neurophysiology of muscle fatigueJournal of Electromyography and Kinesiology, 2011
- The response to paired motor cortical stimuli is abolished at a spinal level during human muscle fatigueThe Journal of Physiology, 2009
- Teleoanticipation in all-out short-duration cyclingBritish Journal of Sports Medicine, 2009
- Somatosensory feedback from the limbs exerts inhibitory influences on central neural drive during whole body endurance exerciseJournal of Applied Physiology, 2008
- Contralateral muscle activity and fatigue in the human first dorsal interosseous muscleJournal of Applied Physiology, 2008
- Muscle fatigue: what, why and how it influences muscle functionThe Journal of Physiology, 2008
- Changes in Segmental and Motor Cortical Output With Contralateral Muscle Contractions and Altered Sensory Inputs in HumansJournal of Neurophysiology, 2003
- Warm Up IISports Medicine, 2003
- Concept of an extracellular regulation of muscular metabolic rate during heavy exercise in humans by psychophysiological feedbackCellular and Molecular Life Sciences, 1996
- Muscle Strength and Its DevelopmentSports Medicine, 1988