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Updated: Jul 5, 2026
Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test
Published on: July 27, 2015
Electromyographic adaptations elicited by submaximal exercise in those naive to and in those adapted to eccentric
Paul LaStayo1, Judah Pifer, David Pierotti
1Department of Physical Therapy, University of Utah, Salt Lake City, Utah, USA. paul.lastayo@health.utah.edu
Abstract:
The purpose of this study was to describe an electromyogram (EMG) pattern during a submaximal eccentric task in 7 subjects adapted to high-force chronic eccentric exercise and 6 subjects naive to eccentric exercise. The EMG in all subjects was quantified during identical submaximal (200 W) eccentric and concentric cycle ergometry tasks. The EMG of the eccentrically adapted subjects was decreased (p < 0.05) compared to the eccentrically naive subjects, in duration, amplitude, and intensity as evidenced by a decreased EMG during the pedal cycle. This decrease may be one component of the protective effect that results from progressively increasing repeated bouts of eccentric muscle work. Clients and patients transitioning to rigorous overload training should become adapted to high eccentric loads and forces to avoid injury and a potential delay in their strength and conditioning training regimens.
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