Isokinetic, Isometric, and Isotonic Strength Relationships.

摘要

The relationships among isokinetic, isometric and isotonic strength measurements in knee and elbow extension and flexion were examined in 16 young, healthy males. Isokinetic (36 deg/sec, 108 deg/sec, 180 deg/sec) and isometric torque measurements were obtained from a modified Cybex II apparatus. An electrogoniometer was used to monitor the joint angle. A modified N-K device was employed to determine maximal isotonic capabilities using a one repetition maximum procedure. Correlations among the three testing modes at the joint angles of peak isometric torque were generally high (bar x = 0.78, range = 0.97 to 0.47) for all four muscle groups. The amounts of common variance suggested that all three strength testing modes were measuring a similar phenomenon which could be termed maximal voluntary strength. Within a particular muscle group, correlations decreased both as the isokinetic velocities and as the joint angles became more widely separated. (Author)