0000000000226578
AUTHOR
A. Michaut
Short-term changes in the series elastic component after an acute eccentric exercise of the elbow flexors
We have studied the effect of a unique eccentric exercise session on the series elastic component (SEC) properties of human elbow flexors. Ten active females performed five sets of ten maximal eccentric contractions on an isokinetic ergometer. Maximal isometric (MVC) torque, and the corresponding myoelectrical activity (RMS) of the biceps brachii and the triceps brachii muscles were recorded before, immediately after, 48 h after, and 1 week after the exercise session. SEC compliance was also measured, using the in situ quick-release technique. Maximal eccentric torque declined significantly among the five sets of the exercise session (P < 0.01). The exercise session induced a significant de…
Specific effects of eccentric training on muscular fatigability.
This study was designed to test the hypothesis that an eccentric training period induces a reduction of neuromuscular fatigability following an eccentric exercise. Before (Pre-T) and after (Post-T) a 7-wks sub-maximal eccentric training, ten active males performed a fatiguing exercise consisting of five sets of ten maximal eccentric elbow flexions. Before (Pre-T-1 and Post-T-1) and after (Pre-T-2 and Post-T-2) each fatiguing exercise, the voluntary torque and its associated agonistic electromyographic activity (RMS), assessed at four angular velocities (-60 degrees x s (-1); 0 degrees x s (-1); 60 degrees x s (-1); 240 degrees x s (-1)) were measured. The isometric voluntary activation leve…
Effets d’une séance d’exercices excentriques sur la récupération à court terme de la contractilité musculaire
Les effets a court terme de 5 series de 10 contractions maximales excentriques des flechisseurs du coude, realisees sur un ergometre isocinetique, sont etudies. Le moment maximal excentrique, isometrique, concentrique, l’activite myoelectrique des biceps et triceps brachii, le niveau d’activation volontaire, l’amplitude de la reponse M, l’amplitude de la secousse, les vitesses maximales de contraction et de relaxation sont mesures avant (Temoin), 2 minutes apres (Post), 24 heures (Post24h) et 48 heures (Post48h) apres la seance d’exercice.Le moment est significativement diminue de Temoin a Post48h, quel que soit le mode de contraction, excepte le moment concentrique mesure a 240°.s-l , qui …