Influence of an exhausting muscle exercise on bimanual coordination stability and attentional demands.
The present study investigated the influence of a bilateral exhaustive exercise on the stability of bimanual anti-phase coordination pattern and attentional demands. Eight subjects performed the anti-phase coordination pattern in two sessions: an Exhausting Session and a Control Session. During the Exhausting Session, subjects performed the bimanual coordination after exhaustion of forearms muscles (i.e. endurance time test). For the Control Session, no endurance time test was previously designed before the performance of anti-phase coordination. Within these experimental sessions, two levels of load (loaded and unload) and two frequencies (1.75 and 2.25 Hz) were also manipulated during the bimanual task. Attentional demands associated with performing the anti-phase coordination pattern was measured via a probe reaction time task (RT). The results showed that relative phase variability was higher for the fastest frequency after the exhaustive exercise. Moreover, as a result of the previous muscle exercise, the observed phase coupling was less accurate. No significant effect was found concerning the attentional demands as assessed through RT. The present findings suggest that the muscle exhaustion affects bimanual performance at a more peripheral level.
Murian
Alexandre
A
JE 2438 Motricité, Interactions, Performance, Université de Nantes, Nantes Atlantique Universités, Faculté des Sciences du Sport, 25 bis boulevard Guy Mollet, BP 72206, 44322 Nantes Cedex 3, France.
Deschamps
Thibault
T
Bourbousson
Jérôme
J
Temprado
Jean Jacques
JJ
D000328:Adult; D001288:Attention / Q000502:physiology*; D005221:Fatigue / Q000503:physiopathology*; D005542:Forearm / Q000502:physiology; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology; D018763:Muscle Fatigue / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*