COMPOUND TRAINING: A STUDY ON THE INFLUENCE ON THE BOUNCING FORCE OF VOLLEYBALL PLAYERS WHEN THEY JUMP AND SPIKE THE BALL

Objective: This paper aims to investigate the impact of compound training (CT) on the jumping spike performance of volleyball players. Methods: Twenty athletes were randomly assigned to either the CT group or the resistance training (RT) group. After eight weeks of training, the results for in-situ jump and reach, run-up jump and reach, as well as squat jump (SJ), counter-movement jump (CMJ), and run-up jump measured using the Just Jump test system were compared between the two groups. Results: Prior to the experiment, there were no significant differences in any of the test parameters between the two groups (p>0.05). Following the experiment, the one-repetition maximum (1RM) weighted deep squat result for the CT group was 146.12 +/- 11.69kg, the in-situ jump and reach height was 3.05 +/- 0.05m, and the run-up jump and reach height was 3.07 +/- 0.05m, all with p<0.05 compared to pre-experiment values and the RT group. Additionally, the duration and height of flight of SJ in the CT group were 0.75 +/- 0.03s and 62.87 +/- 3.46cm, respectively; the duration and height of flight of CMJ were 0.75 +/- 0.02s and 63.83 +/- 4.01cm, respectively; the duration and height of flight of run-up jumps were 0.75 +/- 0.02s and 73.01 +/- 3.87cm, respectively. All of the above results were significantly higher than those before the experiment and those of the RT group (p<0.05). Conclusion: The superior results observed in the CT group's jumping tests suggest that the effects of CT on bouncing force are more pronounced, making it a viable approach for practical training.