Studies on the peculiarity of grip strength in relation to body positions and aging
Teraoka, T.
Kobe Journal of Medical Sciences 25(1): 1-17
1979
ISSN/ISBN: 0023-2513 PMID: 449257 Document Number: 141492
The peculiarity in isometric strength of both hands in different positions was investigated. Subjects were 9543 healthy males and females from 15-55 yr old. Maximum isometric strength was recorded by grip dynamometer (Smedley type). Experiments were conducted with respect to 3 positions (upright, sitting and supine). Grip strength pyramid by sex and age group showed symmetrically decreased results in the right and left hand in females in comparison with the grip strength of the males of the same age in an upright position (N = 7.529). In an upright position, 74.11% of males and 71.76% of females got higher values in the right hand; 7.67% of males and 10.47% of females put their strength equally on both hands. Grip strength depended on body positions in all age groups and in both sexes. Grip strength was stronger in an upright position than in a sitting position. Grip strength was stronger in a sitting position than in a supine position. The differences in grip strength in relation to 3 kinds of body positions observed in the experiments were demonstrated by EMG of the muscle flexor digitorum superficialis.