Title :
Force and EMG power spectrum in response to concentric and eccentric exercise
Abstract :
Twenty males performed three bouts of 32 unilateral concentric (CON) or eccentric (ECC) quadriceps muscle actions (180°/s-1 ). Surface electromyography (EMG) and torque were recorded from the m. vastus lateralis and m. rectus femoris. Mean power frequency (MPF) of the EMG and torque were calculated for seven blocks of four consecutive muscle actions. Torque was greater for ECC than for CON muscle actions. It decreased almost linearly for each CON bout, but remained unchanged for ECC. MPF decreased in each CON bout and only a partial recovery was noticed between bouts. In contrast, MPF was unchanged for a single bout or across bouts of ECC exercise. Thus, changes typically associated with a MPF shift are small or nonexistent during ECC but not during CON exercise
Keywords :
bioelectric potentials; biomechanics; muscle; EMG power spectrum; concentric exercise; eccentric exercise; m. rectus femoris; m. vastus lateralis; males; quadriceps muscle actions; torque; Angular velocity; Cutoff frequency; Density functional theory; Digital audio players; Electrodes; Electromyography; Muscles; NASA; Radio frequency; Torque;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95722