Author(s): MANYING, R., YUCHEN, W., Institution: BEIJING INSTITUTE OF SPORT SCIENCE, Country: CHINA, Abstract-ID: 162

INTRODUCTION:
Heavy load squat[1,2]and light load plyometrics training[3] are two common conditioning strategies to elicit PAP response. Although previous studies supporting the notion that both heavy weight resistance training and plyometric training can elicit the PAP effect, to our best knowledge, very few studies have directly compared the effects between these 2 types of conditioning activities. The aim of this study was to investigate whether the Weighted Jump (WJ) and Back Squat (BS) could enhance the subsequent jumping performance and the difference between 2 conditions for inducing PAP effects.
METHODS:
Fifteen male wrestling athletes were recruited to conduct two different intervention strategies to observe the posttest CMJ performance of each strategy. The protocols consisted of 1 baseline Counter Movement Jump (CMJ) followed by 4 CMJs at 15 seconds, 2 minutes, 4 minutes, and 8 minutes after completing BS with 90% 1 Repetition Maximum (RM) or WJ with 10% of body weight. Two-way factorial analysis of variance (ANOVA) with repeated measures were used to examine the differences between WJ and BS groups in jump height, Reactive strength Index (RSI) and contact time.
RESULTS:
The CMJ heights and RSI were significantly increased(p<0.05) in both groups, but the PAP effect in BS group was later than that of WJ group. The contact time was significantly decreased (p<0.05) only in the WJ group and no significant difference was found in the BS group(p>0.05).
CONCLUSION:
It would seem that the WJ and BS both can be an effective stimulus for CMJ performance, but the WJ was better in contact time, RSI and the time to reach the peak jump height as a PAP stimulus. Our results suggested that the WJ may be a better pre-game warm-up protocol in order to increase the performance in the game.