The relationship between speed and isokinetic knee strength in female volleyball players

Abstract

The present study aims to investigate the relationship between speed and isokinetic knee strength applied at different angular velocities in female volleyball players. 11 female volleyball players from the senior category volunteered in the study (mean_age: 20.2±3.9 years, mean_height: 176.8±7.1 cm, mean_weight: 66.6±5.7 kg). Isomed 2000 isokinetic dynamometer was used in order to measure the isokinetic strength of participants while 20 m sprint test was conducted in order to measure the speed. In measuring isokinetic strength, knee flexion and extension (H/Q) were measured separately on concentric/concentric dominant and non-dominant legs at 60°/sec angular velocity for 5 repetitions, at 180°/sec for 10 repetitions, and at 300°/sec for 15 repetitions. In data analysis, Spearman's correlation test was used for the relationship between isokinetic knee strength applied at different angular velocities and speed (p < 0.05). The highest peak torque value in participants was measured on both sides at 60°/sec angular velocity. This was followed by 180°/sec and 300°/sec angular velocities respectively. There was no significant relationship between isokinetic knee strength applied at different angular velocities and speed. In conclusion, there is not any significant relationship between speed and isokinetic knee strength in female volleyball players. .

Keywords: Volleyball, speed, isokinetic strength.

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