THE EFFECT OF PHYSICAL-SKILL EXERCISES ACCORDING TO TARGETED TIMES ON DEVELOPING EXPLOSIVE POWER, STRENGTH-SPEED FOR THE LEGS, AND SOME BIOCHEMICAL INDICATORS FOR SERVING AND SPIKING SKILLS AMONG VOLLEYBALL PLAYERS

Аннотация

The research aimed to: prepare special physical exercises according to targeted times for volleyball players, identify the effect of these exercises on developing the explosive power and strength-speed of the legs, alongside some biochemical indicators for the serving and spiking skills in volleyball, and identify the differences between the control and experimental groups in explosive power, strength-speed of the legs, and some biochemical indicators for the serving and spiking skills. The researchers hypothesized that there are no statistically significant differences between the pre-tests and post-tests in explosive power, strength-speed, and some biochemical indicators for the serving and spiking skills, and that there are no statistically significant differences between the post-tests in explosive power, strength-speed, and some biochemical indicators. The researchers adopted the experimental approach using the equivalent groups design with pre-tests and posttests. The research sample consisted of (32) players from the specialized volleyball school, and the researchers distributed them equally into a control group and an experimental group, each consisting of (16) players. The researchers prepared physical exercises according to targeted times for the experimental group, as the implementation of the curriculum began on October 25, 2024, and continued for (8) weeks, with two training units per week, equivalent to 16 training units. The researchers concluded: The exercises prepared by them have a positive impact on developing the explosive power and strength-speed among volleyball players, and the prepared exercises have a positive impact on developing some biochemical indicators for the serving and spiking skills. Accordingly, the researchers recommended the necessity of using the exercises they prepared in the game of volleyball, and adopting the utilized exercises in various sports games and events.