Neuromuscular Adjustments of the Quadriceps Muscle after Repeated Cycling Sprints

Olivier Girard, David J Bishop and Sébastien Racinais

PLOS ONE, 2013, vol. 8, issue 5, 1-9

Abstract: Purpose: This study investigated the supraspinal processes of fatigue of the quadriceps muscle in response to repeated cycling sprints. Methods: Twelve active individuals performed 10 × 6-s “all-out” sprints on a cycle ergometer (recovery = 30 s), followed 6 min later by 5 × 6-s sprints (recovery = 30 s). Transcranial magnetic and electrical femoral nerve stimulations during brief (5-s) and sustained (30-s) isometric contractions of the knee extensors were performed before and 3 min post-exercise. Results: Maximal strength of the knee extensors decreased during brief and sustained contractions (∼11% and 9%, respectively; P 0.05). While cortical voluntary activation declined (P 40%) reduced (P

Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0061793

DOI: 10.1371/journal.pone.0061793

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