The Effect of a period of Post-activation Potentiation on Peak torque and average power in Squat, Deadlift and Chest Press exercises in Bodybuilding athletes

Preparing athletes to achieve optimal performance has always been the focus of coaches and athletes. The overall aim of this study was to investigate the effect of a period of post-activation potentiation strategy (PAP) on muscle torque and power in squat, and deadlift of bodybuilding athletes.In this quasi-experimental study, ۱۰ bodybuilding athletes in a crossover design with an average Age; ۲۷.۰۰±۵. ۳ years; Height; ۱۸۰.۶±۷.۷cm; and Weight ۸۰.۳±۱۱.۰kg. Participated in this research. The athletes had at least ۲ years of experience in powerlifting competitions. The athletes first participated in a normal warm-up condition and then performed the tests, and then experienced a post-activation potentiation strategy using free weights at ۹۰% of ۱ maximum repetition, and ۶-minute rest before performing the tests. The peak torque & average power of quadriceps and hamstring muscles have been measured. Data analyzed by paired t-test at a confidence level of ۰.۹۵.Findings showed a significant improvements in peak torque of quadriceps (PAP; ۲۰۶.۵ vs. ۲۲۵.۵ N/m in the normal warm-up), and hamstring muscles (PAP; ۱۱۳.۳ N/m vs.۱۲۱.۳ N/m in the normal warm-up) during deadlift exercise. A significant improvements also has been observed in the average power of quadriceps (PAP; ۱۱۵.۳ vs. ۱۳۶.۴ watts in the normal warm-up), and hamstring muscles (PAP;۷۶.۲ vs. ۹۰.۲ watts in the normal warm up), during the squat exercise. There were significant differences in the average power of the quadriceps muscles (PAP; ۱۲۵.۳ vs. ۱۳۹.۳ watts. in the normal warm-up) and hamstring muscles (PAP; ۸۱.۲ vs. ۹۱.۲ watts. in the normal warm-up) in the dead lift exercise (p<۰.۰۵). On the other hand, there were no significant differences in the peak torque of quadriceps (PAP; ۲۱۸.۵ vs. ۲۱۸.۵ N/m in the normal warm up), and peak torque of hamstring muscles (PAP;۱۱۸.۲ vs. ۱۲۳ N/m in the normal warm-up) during squat exercises (p>۰.۰۵).The results showed that this selected post-activation potentiation can be beneficial for power and muscle torque in powerlifting athletes. Therefore, it can be used as a useful specific warm-up before the main performance of the squat, and dead lift in powerlifting competitions.

کلیدواژه ها:

Muscle Power & Torque ، post-activation potentiation ، Power Lifting