Lawton, T., J. Cronin, and R. Lindsell. Effect of in-terrepetition rest intervals on weight training repetition power output. J. Strength Cond. Res. 20(1):172–176. 2006.—The pur-pose of this study was to determine the change in weight train-ing repetition power output as a consequence of interrepetition rest intervals. Twenty-six elite junior male basketball and soccer players performed bench presses using a 6 repetition maximum (6RM) load. The power output for each repetition was recorded using a linear encoder sampling each 10 ms (100 Hz). Subjects were assigned to 1 of 3 intervention groups, differentiated by the arrangement of rest intervals within the 6 repetitions: 6 ϫ 1 repetition with 20-second rest periods between each repetition (Singles); 3 ϫ 2 repetitions with 50 seconds between each pair of repetitions (Doubles); or 2 ϫ 3 repetitions with 100 seconds of rest between each 3 repetitions (Triples). A timer was used to ensure that the rest interval and duration to complete all inter-repetition interventions was equated across groups (118 sec-onds). Significantly (p Ͻ 0.05) greater repetition power outputs (25–49%) were observed in the later repetitions (4–6) of the Sin-gles, Doubles, and Triples loading schemes. Significantly greater total power output (21.6–25.1%) was observed for all interrepe-tition rest interventions when compared to traditional continu-ous 6RM total power output. No significant between-group dif-ferences were found (p ϭ 0.96). We conclude that utilizing in-terrepetition rest intervals enables greater repetition and total power output in comparison to traditional loading parameters.
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