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Simpson Scott R.; Rozenek, Ralph; Garhammer, John; Lacourse, Michael; Storer, Thomas
Journal of Strength and Conditioning Research: May 1997
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ABSTRACTThis study was conducted to determine the relationship between the performances of one repetition maximums (1-RM) of selected free weight and Universal machine exercises. Subjects, 57 young women and 67 young men, performed a 1-RM for the Universal bench press (UBP), free weight bench press (FWBP), Universal leg press (ULP), and free weight parallel squat (FWPS). Test correlations were significant (p < 0.05) for both genders: women, upper body, r = 0.95; lower body, r = 0.66; men, upper body, r = 0.94; lower body, r = 0.67. Eight regression equations were developed to predict 1-RM for UBP, FWBP, ULP, and FWPS. These equations may be useful to coaches and athletes who wish to convert to the approximate weight needed for a lift when switching from one type of resistance equipment to another.

This study was conducted to determine the relationship between the performances of one repetition maximums (1-RM) of selected free weight and Universal machine exercises. Subjects, 57 young women and 67 young men, performed a 1-RM for the Universal bench press (UBP), free weight bench press (FWBP), Universal leg press (ULP), and free weight parallel squat (FWPS). Test correlations were significant (p < 0.05) for both genders: women, upper body, r = 0.95; lower body, r = 0.66; men, upper body, r = 0.94; lower body, r = 0.67. Eight regression equations were developed to predict 1-RM for UBP, FWBP, ULP, and FWPS. These equations may be useful to coaches and athletes who wish to convert to the approximate weight needed for a lift when switching from one type of resistance equipment to another.

© 1997 National Strength and Conditioning Association