Estimation of a One Repetition Maximum Bench Press for Untrained Women

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Abstract

ABSTRACT

This study compared the estimated weight lifted for 1-RM and actual 1-RM bench press weight for untrained women using 3 common regression equations. Regression analysis was also used to develop an equation for estimating max bench press strength using the relationship of a 1-RM bench press measure with performance variables and/or structural dimensions in the same group of women (N = 57), who underwent a submax bench press test (4–8-RM) and a 1-RM for bench press to determine repetitions (Reps) to fatigue and the weight lifted during the submaximal test (SubWt). Also measured were body mass (BM), height (Ht), biacromial breadth (BaB), arm length (AL), triceps skinfold (TS), and upper arm circumference (UAC). Cross-sectional area (CSA) of the upper arm was calculated from UAC and TS. The Reps and SubWt were then entered into regression equations from Bryzcki, Epley, and Landers. Paired t-test comparisons of actual vs. predicted indicated statistical difference (p < 0.001) using the equations by Landers and Brzycki, but none when using the equation by Epley. Stepwise regression analysis showed SubWt, Reps, and BaB as the variables to be used in the prediction equation for this population. This study concluded the Epley equation could be used to estimate 1-RM for untrained women, and that the regression equation for this population provided a good estimate of bench press strength.

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