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Published on: December 11, 2016
Alterations in neuromuscular function and perceptual responses following acute eccentric cycling exercise
Steven J Elmer1, John McDaniel, James C Martin
1Department of Exercise and Sport Science, The University of Utah, 250 S. 1850 E. Room 241, Salt Lake City, UT 84112-0920, USA. steve.elmer@utah.edu
European Journal of Applied Physiology
|August 26, 2010
Summary
Eccentric exercise caused a global reduction in cycling power and neuromuscular function, not specific to pedaling speed. Perceived exertion changes mirrored power output changes, suggesting increased motor unit recruitment.
Area of Science:
- Exercise Physiology
- Sports Science
- Neuromuscular Function
Background:
- Previous research indicates velocity-dependent strength loss after eccentric exercise in single-joint actions.
- The impact of velocity on multi-joint function recovery post-eccentric exercise is not well-established.
Purpose of the Study:
- To compare changes in maximal cycling power across various pedaling rates after eccentric exercise.
- To assess if changes in rating of perceived exertion (RPE) during submaximal cycling correlate with maximal cycling power alterations.
Main Methods:
- Eighteen cyclists underwent maximal and submaximal single-leg cycling tests (concentric and eccentric).
- Measurements were taken at baseline, 24, and 48 hours post-exercise.
- Maximal cycling power (Pmax) and power at specific RPMs (65, 110, 155) were assessed using inertial-load cycling.
Main Results:
- Maximal cycling power (Pmax) decreased by 11-13% in the eccentric leg at 24-48 hours.
- Power output at 65, 110, and 155 RPM showed similar relative reductions (11-15%) in the eccentric leg.
- Rating of Perceived Exertion (RPE) increased by 15-18% in the eccentric leg, with changes mirroring Pmax alterations.
Conclusions:
- Eccentric exercise induced a global reduction in neuromuscular function, independent of pedaling velocity.
- Findings do not support fiber-type specific muscle damage from eccentric exercise.
- Concordant changes in RPE and maximal power suggest increased motor unit recruitment for submaximal efforts.
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