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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
EXERCISE PHYSIOLOGY AND BIOMECHANICS
Mayhew J. L. 1, Ware J. S. 2, Cannon K. 3, Corbett S. 4, Chapman P. P. 4, Bemben M. G. 5, Ward T. E. 6, Farris B. 5, Juraszek J. 5, Slovak J. P. 6
1 Human Performance Laboratory and
2 Department of Athletics, Truman State University Kirksville, Missouri, USA
3 Department of Athletics, Northern Michigan University Marquette, Michigan, USA
4 Strength and Conditioning Department, University of North Dakota, Grand Forks, North Dakota, USA
5 Human Performance Laboratory, Oklahoma University Norman Oklahoma, USA
6 Department of Physical Education, Texas A & M at Commerce Commerce, Texas, USA
Background. The purpose of this study was to evaluate the accuracy of repetitions-to-fatigue (RTF) using an absolute load of 102.3 kg (225 lbs) to estimate one-repetition maximum (1-RM) bench press performance in college football players using various prediction equations.
Methods. Experimental design: a prospective study on the association between muscular endurance and muscular strength. Participants: 260 players from NCAA Division IA (n=43), IAA (n=63), II (n=129), and red-shirts (n=25) were evaluated at the conclusion of a minimum of eight weeks of heavy-resistance training during the off-season. Measures: all subjects performed a 1-RM bench press and RTF using an absolute load of 102.3 kg.
Results. The Mayhew et al. NFL-225 equation nonsignificantly overestimated 1-RM from RTF by 0.5 kg, while the Chapman et al. NFL-225 equation significantly underpredicted by 3.2 kg, although both equations were comparable in the number of players predicted within ±4.5 kg of actual 1-RM (52% vs 51%, respectively). Only two of nine RTF equations currently in use produced predicted 1-RM values that were not significantly different from actual 1-RM performance.
Conclusions. Specific NFL-225 equations are more accurate in estimating 1-RM bench press from absolute muscle endurance in college football players than previous published RTF equations. The accuracy of prediction decreases at higher repetitions.