Hip rotator peak torque and hip range of motion ratios in healthy adults
The purpose of this study was to determine the ratio which exists between internal and external hip rotation in measures of both peak muscle torque and joint range of motion. Sixty-four volunteer adult subjects (43 females 21 males mean age 24.9 years SD = 7.0) were tested for hip joint internal and external rotation range of motion using hand-held goniometry. Subjects were tested to establish peak internal and external rotation torque values using a modified Orthotron dynamometer. It was found that internal rotation and external rotation each accounted for 50 percent of the total range of hip joint rotation. External hip rotator torque accounted for 60 percent of the total hip rotator toque while internal rotator torque accounted for only 40 percent. The range-of-motion data agree with earlier findings; however the peak torque data show a 60:40 imbalance in favor of external rotation. This result conflicts with earlier research, but does support in part the slight turnout that occurs in most people during level normal walking.
Original Publication Date
Hamilton, N., "Hip rotator peak torque and hip range of motion ratios in healthy adults" (1992). Faculty Publications. 4475.