Resumen de The Acute Effects of An Ascending Squat Protocol on Performance During Horizontal Plyometric Jumps

Ryan M. Ruben, Michelle A. Molinari, Charlotte A. Bibbee, Matt A. Childress, Megan S. Harman, Kyle P. Reed, G. Gregory Haff

• The purpose of the present investigation was to examine the effects of a strength-power potentiation complex that involved performing a horizontal plyometric activity 5 minutes after the completion of an ascending back squat protocol. Twelve men who could back squat a minimum of 1.5 time body mass participated in a familiarization session and 2 randomly assigned testing sessions each separated by approximately 1 week. In the control session, the subject rested for 5 minutes and then performed the horizontal plyometric tests. In the potentiation session (POT), the subjects performed an ascending back squat protocol that consisted of 5 repetitions at 30% of 1 repetition maximum (1RM), 3 repetitions at 70% 1RM, and 3 repetitions at 90% 1RM. Five minutes after completing the ascending back squat protocol, the subjects undertook the horizontal plyometric test, which consisted of jumping over 5 hurdles that were separated by 45.7 cm and were set to a height of 65.2 ± 4.0 cm. An accelerometer was used to assess peak power output (PP), velocity (PV), and force (PF) across the 5 jumps. The average PF generated across the 5 hurdles was significantly higher in the POT session (p = 0.01, d = 0.45). In addition, the maximum PP output (p = 0.05, d = 1.12) and PF (p = 0.004, d = 0.61) were higher in the POT trials. Individuals who were able to back squat approximately 2.0 ± 0.1 times body mass exhibited a greater percent potentiation for average PP output (p = 0.001, [eta]2 = 0.68) and average PV (p = 0.02, [eta]2 = 0.61). The present data suggest only very strong individuals (back squat >= 2.0 × body mass) exhibit a potentiation effect in a horizontal plyometric activity after performing an ascending back squat protocol.