Title :
EMG of trunk muscles in isometric and isokinetic MVC
Author :
Kumar, Shrawan ; Chaffin, Don ; Redfern, Mark
Author_Institution :
Dept. of Phys. Therapy, Alberta Univ., Edmonton, Alta., Canada
Abstract :
The relationship between the electromyographic activity of erector spinae at L3 level and hand force during isometric and multispeed isokinetic (20 cm S-1, 60 cm S-1, and 100 cm S-1) arm lift and back lift was investigated among ten normal male subjects. The magnitude of the EMG (electromyogram) signals at the intervals of one-tenth of the activity cycle were significantly different during isokinetic back lifts (p<0.001) but not significantly different for either the arm lifts or isometric back lift. For the back lift the interval point differences were between 6% and 16% for EMG and between 26% and 48% for hand forces. The relationship between the EMG and the hand force during the post-peak-force period was inverse
Keywords :
bioelectric potentials; biomechanics; muscle; L3 level; arm lift; back lift; electromyographic activity; erector spinae; hand force; maximal voluntary contraction; normal male subjects; post-peak-force period; trunk muscles; Electromyography; Ergonomics; Force measurement; Industrial relations; Medical treatment; Muscles; Pain; Performance evaluation; Stress; Testing;
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.1989.96070
