Levinger Itamar, Goodman Craig, Hare David L, Jerums George, Toia Deidre, Selig Steve
Centre for Ageing, Rehabilitation, Exercise and Sport, School of Human Movement, Recreation and Performance, Victoria University, Australia.
J Sci Med Sport. 2009 Mar;12(2):310-6. doi: 10.1016/j.jsams.2007.10.007. Epub 2007 Dec 19.
The one-repetition maximum (1RM) test is considered the gold standard for assessing muscle strength in non-laboratory situations. Since most previous 1RM reliability studies have been conducted with experienced young participants, it is unclear if acceptable test-retest reliability exists for untrained middle-aged individuals. This study examined the reliability of the 1RM strength test of untrained middle-aged individuals. Fifty-three untrained males (n=25) and females (n=28) aged 51.2+/-0.9 years participated in the study. Participants undertook the first 1RM test (T1) 4-8 days after a familiarisation session with the same exercises. 1RM was assessed for seven different exercises. Four to eight days after T1, participants underwent another identical 1RM test (T2). Ten weeks later, 27 participants underwent a third test (T3). Intraclass correlation coefficients (ICC), typical error as a coefficient of variation (TEcv), retest correlation, repeated measures ANOVA, Bland-Altman plots, and estimation of 95% confidence limits were used to assess reliability. A high ICC (ICC>0.99) and high correlation (r>0.9) were found for all exercises. TEcv ranged from 2.2 to 10.1%. No significant change was found for six of the seven exercises between T1 and T2. Leg press was slightly higher at T2 compared to T1 (1.6+/-0.6%, p=0.02). No significant change was found between T2 and T3 for any exercise. 1RM is a reliable method of evaluating the maximal strength in untrained middle-aged individuals. It appears that 1RM-testing protocols that include one familiarisation session and one testing session are sufficient for assessing maximal strength in this population.
一次重复最大值（1RM）测试被认为是在非实验室环境中评估肌肉力量的金标准。由于之前大多数1RM可靠性研究都是针对有经验的年轻参与者进行的，因此尚不清楚未经训练的中年个体是否存在可接受的重测可靠性。本研究检验了未经训练的中年个体1RM力量测试的可靠性。53名年龄在51.2±0.9岁的未经训练的男性（n = 25）和女性（n = 28）参与了该研究。参与者在对相同练习进行熟悉训练后的4 - 8天进行了第一次1RM测试（T1）。对七种不同的练习进行了1RM评估。在T1后的4 - 8天，参与者进行了另一次相同的1RM测试（T2）。十周后，27名参与者进行了第三次测试（T3）。使用组内相关系数（ICC）、作为变异系数的典型误差（TEcv）、重测相关性、重复测量方差分析、Bland - Altman图以及95%置信限估计来评估可靠性。所有练习均发现高ICC（ICC>0.99）和高相关性（r>0.9）。TEcv范围为2.2%至10.1%。七种练习中的六种在T1和T2之间未发现显著变化。与T1相比，腿举在T2时略高（1.6±0.6%，p = 0.02）。任何练习在T2和T3之间均未发现显著变化。1RM是评估未经训练的中年个体最大力量的可靠方法。似乎包括一次熟悉训练和一次测试的1RM测试方案足以评估该人群的最大力量。
