Effects of Unilateral and Bilateral Complex Training on the maximum strength, explosive power, and changing direction ability of volleyball players

Abstract

Unilateral complex training involves focusing on one limb (single foot) and working independently in each training session. After conducting maximum strength training through the muscle contraction and work of the leg on that side, it is immediately followed by light-load rapid-strength training with a biomechanical movement pattern similar to the heavy-load resistance training movement on the same side. This is a training method that combines single-leg maximum strength and rapid-strength training to efficiently develop athletes' strength and explosive power. Volleyball is a sport that places high demands on lower-limb strength. The maximum strength, explosive power, and change-of-direction ability of the lower limbs are crucial for the performance of volleyball techniques and tactics.

Objective of the study is two:1. To compare before and after of the unilateral complex and bilateral complex training on the maximum strength, explosive power, and changing direction ability of volleyball players.2. To compare a group of unilateral and bilateral complex training on the maximum strength, explosive power, and changing direction ability of volleyball players.

The research subjects were male volleyball players from two universities, with 34 players from each university. The experimental group underwent unilateral compound training of the lower limbs, while the control group carried out bilateral compound training of the lower limbs. The training lasted for 8 weeks, with 2 training sessions per week, and each session lasting 80 minutes.

This study employed methods such as literature review, experimentation, testing, and statistical analysis. By measuring indicators of athletes including 1RM squat, Isometric Mid - Thigh Pull, Counter - Movement Jump, Drop Jump, 5 - meter sprint, 10-meter sprint, The speed of a jump-served ball, The speed of a jump-spiked ball, and 180º Change of Direction Speed, the effects of the two training methods were compared. The results showed that: By comparing the performance before and after the intragroup trials, it indicated that both unilateral compound training and bilateral compound training could effectively improve the athletes' maximum strength, explosive power, and change-of-direction ability after 8 weeks of intervention training. By comparing the improvement ranges before and after the inter-group experiments, it was shown that the unilateral compound training was more effective than the bilateral group in improving the performance of single-leg test items, as well as the 5 - 5-meter sprint and 10-meter sprint. The bilateral compound training had a greater improvement range in double-leg test items than the unilateral group. Overall, however, the effect of unilateral compound training was superior to that of bilateral compound training.

The objective of the study is two. To compare before and after unilateral complex and bilateral complex training on the maximum strength, explosive power, and changing direction ability of volleyball players. 2. To compare a group of unilateral and bilateral complex training on the maximum strength, explosive power, and changing direction ability of volleyball players.

The research subjects were male volleyball players from two universities, with 34 players from each university. The experimental group underwent unilateral compound training of the lower limbs, while the control group carried out bilateral compound training of the lower limbs. The training lasted for 8 weeks, with 2 training sessions per week, and each session lasting 80 minutes.

This study employed methods such as literature review, experimentation, testing, and statistical analysis. By measuring indicators of athletes including 1RM squat, Isometric Mid - Thigh Pull, Counter - Movement Jump, Drop Jump, 5 - meter sprint, 10-meter sprint, The speed of a jump-served ball, The speed of a jump-spiked ball, and 180º Change of Direction Speed, the effects of the two training methods were compared. The results showed that: By comparing the performance before and after the intragroup trials, it indicated that both unilateral compound training and bilateral compound training could effectively improve the athletes' maximum strength, explosive power, and change of direction ability after 8 weeks of intervention training. By comparing the improvement ranges before and after the inter-group experiments, it was shown that the unilateral compound training was more effective than the bilateral group in improving the performance of single-leg test items, as well as the 5 - 5-meter sprint and 10-meter sprint. The bilateral compound training had a greater improvement range in double-leg test items than the unilateral group. Overall, however, the effect of unilateral compound training was superior to that of bilateral compound training.

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