EFFECT OF STRETCHING AND STRENGTH EXERCISES ON SPEED,POWER ABILITIES OF MALE VOLLEYBALL PLAYERS: OF CALAQO PREPARATORY SCHOOL; EAST HARARGHE ZONE, OROMIA REGIONAL STATE, ETHIOPIA

Abstract

The purpose of this study was to evaluate the effect of stretching and strength exercises on speed, power and flexibility of male volleyball players of chelenko preparatory school. The sample of this study was 20 volleyball players of Chelenko preparatory school and the subjects were selected by using purposive sampling technique. A quesi experimental research designed used for providing pre-test, during-test and post-test in order to identify the effect of stretching and strength exercises on speed, power and flexibility of male volleyball players. There is no a control group in this study.The data were analyzed by using basic descriptive statistics. The significance of differences between measurements was evaluated with “paired sample T-test” and computerized statistical package software for social science (SPSS) version 20 at p<0.05%.According to analyzed data, The mean value for speed test pre training was 8 ±1.55, during training test results was 5.59±1.4 m/sec and post training result was 3.655±.594m/sec.The mean difference value decreased by 4.345m/sec (P=0.00).The mean value for vertical jump test pre training was 41.95 ±8.325 cm, during training test results was 49.6±8.689cm and post training result was 58.2000±9.39541 cm. The mean difference value increased by 16.25 cm (P=0.000). The mean value of pre training test results of sit and reach test was 4.775±1.576 inches, during training test mean value result was 7.6±1.18766 inch and post training test mean value result of SRTwas 8.9500±1.39454 inches. The mean difference value increased by 4.175 inches (P=0.000)after 8 week stretching and strength exercises program. The results showed significant changes in all of variables used to evaluate power, speed andflexibility. Vertical jump performance showed increased tendencies. So this study conclude that consecutive 8 weeks stretching and strength exercise program was effective in improving speed, power, and improving flexibility of male volley ball players.