Abstract
The objective of the study was to identify the effects of wrist position, force exertion direction, and angular velocity on simultaneous grip force and wrist torque under the isokinetic condition. Twenty-five male students participated in the study and the isokinetic wrist dynamometer was utilized to measure both forces from 90° of flexion to 90° of extension in the slow velocities of 10°/s, 20°/s, and 30°/s. The results revealed that grip force and wrist torque were larger around neutral and there was a passive force in the extremely extended wrist position. Wrist torque only was higher in the flexion direction but grip force for both directions did not differ significantly. Both grip force and wrist torque decreased when angular velocities increased and velocities could be classified into three groups, such as isometric, 5-20°/s, over 25°/s, according to the magnitude of force reduction. Finally, it was described that wrist positions, where maximal grip force and wrist torque occurred, were inconsistent and significant ranges of the wrist position including maximal forces were broad under the isokinetic condition of even slow velocities.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 133-143 |
| Number of pages | 11 |
| Journal | International Journal of Industrial Ergonomics |
| Volume | 29 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2002 |
| Externally published | Yes |
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Keywords
- Angular velocity
- Force exertion direction
- Grip force
- Isokinetic condition
- Wrist position
- Wrist torque
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Safety, Risk, Reliability and Quality
- Human Factors and Ergonomics
Cite this
The effect of wrist position, angular velocity, and exertion direction on simultaneous maximal grip force and wrist torque under the isokinetic conditions. / Jung, Myung Chul; Hallbeck, Susan.
In: International Journal of Industrial Ergonomics, Vol. 29, No. 3, 2002, p. 133-143.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effect of wrist position, angular velocity, and exertion direction on simultaneous maximal grip force and wrist torque under the isokinetic conditions
AU - Jung, Myung Chul
AU - Hallbeck, Susan
PY - 2002
Y1 - 2002
N2 - The objective of the study was to identify the effects of wrist position, force exertion direction, and angular velocity on simultaneous grip force and wrist torque under the isokinetic condition. Twenty-five male students participated in the study and the isokinetic wrist dynamometer was utilized to measure both forces from 90° of flexion to 90° of extension in the slow velocities of 10°/s, 20°/s, and 30°/s. The results revealed that grip force and wrist torque were larger around neutral and there was a passive force in the extremely extended wrist position. Wrist torque only was higher in the flexion direction but grip force for both directions did not differ significantly. Both grip force and wrist torque decreased when angular velocities increased and velocities could be classified into three groups, such as isometric, 5-20°/s, over 25°/s, according to the magnitude of force reduction. Finally, it was described that wrist positions, where maximal grip force and wrist torque occurred, were inconsistent and significant ranges of the wrist position including maximal forces were broad under the isokinetic condition of even slow velocities.
AB - The objective of the study was to identify the effects of wrist position, force exertion direction, and angular velocity on simultaneous grip force and wrist torque under the isokinetic condition. Twenty-five male students participated in the study and the isokinetic wrist dynamometer was utilized to measure both forces from 90° of flexion to 90° of extension in the slow velocities of 10°/s, 20°/s, and 30°/s. The results revealed that grip force and wrist torque were larger around neutral and there was a passive force in the extremely extended wrist position. Wrist torque only was higher in the flexion direction but grip force for both directions did not differ significantly. Both grip force and wrist torque decreased when angular velocities increased and velocities could be classified into three groups, such as isometric, 5-20°/s, over 25°/s, according to the magnitude of force reduction. Finally, it was described that wrist positions, where maximal grip force and wrist torque occurred, were inconsistent and significant ranges of the wrist position including maximal forces were broad under the isokinetic condition of even slow velocities.
KW - Angular velocity
KW - Force exertion direction
KW - Grip force
KW - Isokinetic condition
KW - Wrist position
KW - Wrist torque
UR - http://www.scopus.com/inward/record.url?scp=0036167392&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036167392&partnerID=8YFLogxK
U2 - 10.1016/S0169-8141(01)00058-0
DO - 10.1016/S0169-8141(01)00058-0
M3 - Article
VL - 29
SP - 133
EP - 143
JO - International Journal of Industrial Ergonomics
JF - International Journal of Industrial Ergonomics
SN - 0169-8141
IS - 3
ER -