Acute Negative Effect of a Hypertrophy-Oriented Training Bout on Subsequent Upper-Body Power Output

Athletes regularly combine maximal strength, power, and hypertrophy-oriented training within the same workout. Tra-ditionally, it has been suggested that power-oriented exercis-es precede strength and hypertrophy-oriented training with-in a workout to avoid the possible negative effects that the latter types of training may have on power output. However, with regard to upper-body training, little study has been performed to verify this commonly held belief. The purpose of this study was to determine the extent, if any, of a high-repetition, short-rest-period, hypertrophy-oriented training dose on upper-body power output. Twenty-seven college-aged rugby league players were tested for average power output during bench press throws with a resistance of 40 kg (BT P40). The experimental group (Hyp, n 5 15) then per-formed a typical hypertrophy-oriented work bout (3 3 10 at 65 % 1 repetition maximum bench press, 1RM BP) before be-ing retested for power output with the same resistance. In comparison with the control group (Con, n 5 12), whose power output remained unchanged between the pre- and posttest periods, the Hyp group experienced a large, signif-icant decrease in BT P40 power output. Even after further passive rest of 7 minutes, power output remained sup-pressed from the pretest values. Furthermore, the strongest 5 subjects experienced significantly larger percentage de-clines in power output than did the 5 less strong subjects. This study shows that a high-repetition, short-rest-period training can acutely decrease power output. Coaches should plan the order of exercises carefully when combining power and hypertrophy training