Arm-cycling sprints induce neuromuscular fatigue of the elbow flexors and alter corticospinal excitability of the biceps brachii

Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme
Gregory E P PearceyDuane C Button

Abstract

We examined the effects of arm-cycling sprints on maximal voluntary elbow flexion and corticospinal excitability of the biceps brachii. Recreationally trained athletes performed ten 10-s arm-cycling sprints interspersed with 150 s of rest in 2 separate experiments. In experiment A (n = 12), maximal voluntary contraction (MVC) force of the elbow flexors was measured at pre-sprint 1, post-sprint 5, and post-sprint 10. Participants received electrical motor point stimulation during and following the elbow flexor MVCs to estimate voluntary activation (VA). In experiment B (n = 7 participants from experiment A), supraspinal and spinal excitability of the biceps brachii were measured via transcranial magnetic and transmastoid electrical stimulation that produced motor evoked potentials (MEPs) and cervicomedullary motor evoked potentials (CMEPs), respectively, during a 5% isometric MVC at pre-sprint 1, post-sprint 1, post-sprint 5, and post-sprint 10. In experiment A, mean power output, MVC force, potentiated twitch force, and VA decreased 13.1% (p < 0.001), 8.7% (p = 0.036), 27.6% (p = 0.003), and 5.6% (p = 0.037), respectively, from pre-sprint 1 to post-sprint 10. In experiment B, (i) MEPs decreased 42.1% (p = 0.002) from pre-sprint...Continue Reading

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Citations

May 9, 2018·European Journal of Sport Science·Israel HalperinDuane C Button
Jan 13, 2018·Frontiers in Human Neuroscience·Gregory E P PearceyE Paul Zehr
Apr 28, 2018·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Brandon W CollinsDuane C Button
May 11, 2019·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Duane C Button, Jayne M Kalmar
Nov 15, 2019·Journal of Applied Physiology·Christopher LatellaJanet L Taylor
Jul 7, 2020·Acta Physiologica·Callum G BrownsteinKevin Thomas
Apr 24, 2019·European Journal of Applied Physiology·Arthur PeyrardThomas Rupp
Sep 1, 2017·Journal of Neurophysiology·Brandon Wayne CollinsDuane C Button
Dec 10, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Evan J LockyerD C Button

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