Athletic Performance Department, University of Missouri, Columbia, Missouri, USA.
J Strength Cond Res. 2012 Oct;26(10):2623-31. doi: 10.1519/JSC.0b013e31826791ef.
The National Football League (NFL)-225 test has gained popularity for assessing muscular performance among college football programs. Although the test is a measure of absolute muscular endurance, it was reputed to be highly correlated with maximum muscular strength. The purposes of this study were to assess the predictive potential of the NFL-225 test for estimating 1 repetition maximum (1RM) bench press performance in National Collegiate Athletic Association Division I college football players and to evaluate the accuracy of previous NFL-225 prediction equations. Players (n = 289) in a successful Division I program were assessed over a period of 5 years for 1RM bench press and repetitions completed with 102.3 kg (225 lb). Test sessions occurred within 1 week of each other during the off-season training period. In a validation group (n = 202), repetitions were significantly correlated with 1RM (r = 0.95), producing a prediction equation (1RM [kg] = 103.5 + 3.08 Reps) with a standard error of estimate = 6.4 kg (coefficient of variation = 4.3%). In a randomly selected cross-validation group (n = 87), the new equation nonsignificantly underpredicted by 0.9 ± 7.2 kg produced a high correlation with actual 1RM (intraclass correlation coefficient [ICC] = 0.967), had a limit of agreement of -15.0 to 13.2 kg, and predicted 69% of the group within ±4.5 kg of their actual 1RM. The best previous equation was that of Slovak et al., which was nonsignificantly underpredicted by -0.5 ± 6.7 kg, produced a high correlation with actual 1RM (ICC = 0.975), and predicted 68% of the group within ±4.5 kg of their actual 1RM. The new NFL-225 test seems to be a reasonable predictor of 1RM bench press in Division I players but should be further assessed on players from other high-level programs.
国家橄榄球联盟（NFL）-225 测试在评估大学生橄榄球项目的肌肉表现方面越来越受欢迎。虽然该测试是衡量绝对肌肉耐力的指标，但它被认为与最大肌肉力量高度相关。本研究的目的是评估 NFL-225 测试对估计全国大学生体育协会一级学院足球运动员 1 次重复最大（1RM）卧推表现的预测潜力，并评估之前 NFL-225 预测方程的准确性。在一个成功的一级学院项目中，289 名球员在 5 年内接受了 1RM 卧推和 102.3 公斤（225 磅）完成的重复次数评估。测试在淡季训练期间每周进行一次。在验证组（n=202）中，重复次数与 1RM 显著相关（r=0.95），产生了一个预测方程（1RM[kg]=103.5+3.08 Reps），估计标准误差为 6.4kg（变异系数=4.3%）。在随机选择的交叉验证组（n=87）中，新方程低估了 0.9±7.2kg，与实际 1RM 高度相关（组内相关系数[ICC]=0.967），其一致性界限为-15.0 至 13.2kg，预测了 69%的组在实际 1RM 的±4.5kg 范围内。之前最好的方程是斯洛伐克等人的方程，低估了-0.5±6.7kg，与实际 1RM 高度相关（ICC=0.975），预测了 68%的组在实际 1RM 的±4.5kg 范围内。新的 NFL-225 测试似乎是一级学院 1RM 卧推的合理预测指标，但应在其他高水平项目的运动员中进一步评估。
