抄録
Jump height and isokinetic knee muscular strength of women college volleyball spikers were measured in order to clarify degree of contribution of run and arm swing to jump height, in applying a jump test for isokinetic strength in rehabilitation. We measured jump height of spike jump（SKJ）, jump height without run（counter movement jump 1； CMJ1）, and jump height without run and arm swing（counter movement jump 2； CMJ2）. As a result, SKJ was（mean ± s.d.）49.1 ± 7.5 cm, CMJ1 was 35.6 ± 5.1 cm, and CMJ2 was 29.8 ± 4.0 cm. High correlation was observed between contribution of the run and SKJ. The isokinetic knee torque was reduced with an accompanying increase in angular velocity. The jump heights measured by these three methods were correlated significantly to isokinetic knee torque, especially to the knee extension torque at 180 deg/sec. In addition, the three jump heights and the isokinetic knee torque of higher rank spikers were significantly larger than lower rank spikers.
