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

fYear

1989

Firstpage

1029

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IEMBS.1989.96070

Filename

96070