Abstract

The effects of two lumbar/sacral supports (LSS) on peak trunk rotational torque, total work and average power were measured. The subjects were 10 well-conditioned males, with an age range of 21-35 years. Subjects presented no history of back pain or related pathology. Each performed three counterbalanced testing sessions separated by a seven-day rest interval. All subjects were tested with each of the two LSSs and once without any LSS device. Four isokinetic velocities (60 deg/sec, 90 deg/sec, 120 deg/sec, 150 deg/sec) were selected in accordance with a standard Cybex Left/Right Trunk Rotation (TR) protocol. Resultant data were subjected to analyses of variance with repeated measures. Peak (left) TR torque at 60 deg/sec was greater for one of the experimental LSSs and the uncontrolled condition. Peak (left) TR torque at 150 deg/sec noted significant statistical differences between the two experimental LSSs. Comparative means also demonstrated a tendency to increase trunk rotational forces in the unsupported conditions. Verf.-Referat