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Original articles  EXERCISE PHYSIOLOGY AND BIOMECHANICS


The Journal of Sports Medicine and Physical Fitness 2002 September;42(3):304-8

language: English

Validation of the NFL-225 test for predicting 1-RM bench press performance in college football players

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


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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.

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