Descriptive measures of isokinetic trunk testing

Measurements of isokinetic parameters during trunk flexion and extension were collected for 44 untrained adult subjects (23 females, 21 males) using a Cybex® II dynamometer and trunk stabilization system interface to a Cybex Date Reduction Computer. On each of three days, subjects performed two sets (trials) of maximal extension/flexion contractions. One trial consisted of four repetitions each at the isokinetic speeds of 30, 60, 90, and 120°/sec. Data interpretation consisted of: Peak torque, range of motion from the initiation of contraction to peak torque, total range of motion, total work performed, total power generated, torques produced relative to body weight, and flexion/extension torque and work ratios. It was concluded that isokinetic testing of the trunk can provide clinically useful guidelines for trunk evaluation and rehabilitation when a large data base is collected for subject populations with various physical characteristics.