| dc.description.abstract | Heavy resistance exercise may induce post-activation potentiation (PAP), enhancing performance of a subsequent biomechanically similar movement. Performance is enhanced when potentiation is greater than fatigue. The purpose of the study is to determine the effect of completing 1, 3, or 5 back squat repetitions at a 5RM load on the magnitude and time-course of PAP during vertical jumps (VJ). Twenty- four resistance-trained males (n=14) and females (n=10) completed baseline 5RM testing, and then completed 1, 3, or 5 repetitions of their 5RM back squat in randomized order on separate days. During each visit, vertical jump performance was assessed before, and every minute for 8 minutes following completion of the prescribed squat repetitions (reps). Peak power (PP), average power (AP), peak velocity (PV), average velocity (AV), and VJ height (VJH) were recorded during the VJs. The 5-rep condition elicited the greatest fatigue of all conditions and decreased vertical jump performance immediately after squatting. However, none of the conditions elicited an increase in vertical jump performance. The results indicate that performing a heavy-load back squat may not enhance subsequent vertical jump performance. Future research should examine decreases in volume, increases in rest interval, and individuals with greater training adaptations association with anaerobic training (i.e. power athletes). | |
