This study investigated the effects of concurrent training performed either with repetitions to failure or not to failure in muscle power, muscle quality (MQ), peak oxygen uptake (VO_2peak), and visceral fat in older men. This is an ancillary analysis of a randomized controlled trial. 36 older men (mean age ± SD; 67.1 ± 5.1 years) were randomized into three groups: one performing repetitions to failure (RFG, n = 13), another performing repetitions not to failure and 50% of the repetitions of the RFG (NFG, n = 12), and third performing repetitions not to failure with equal training volume of the RFG (ENFG, n = 11). The training was performed twice a week for 20 weeks at intensities ranging from 65 to 80% of maximal strength. In each session, the individuals started with strengthening exercises and then performed aerobic exercise (i.e., walking) on a treadmill. The primary endpoint was change from baseline to post-20 wk of absolute and relative muscle power output during squat and countermovement jump, ultrasound measurements for MQ using quadriceps echo intensity, and visceral fat thickness, as well as their VO_2peak through a maximal incremental test on a treadmill. All training groups improved similarly and significantly jump height (ranging from 9 to 16%) and all their muscle power outcomes (mean change ranging from 2 to 7%) (P < .001). In addition, all groups significantly decreased visceral fat thickness (ranging from −11 to −21%) (P < .001), and significantly increased VO_2peak (ranging from 4 to 8%) (P < .01), with no differences between groups. No changes were observed in the MQ outcomes. Concurrent training performed using repetitions to failure or not to failure promoted similar gains in the muscle power output, aerobic capacity, and visceral fat in healthy older men.

这项研究调查了同时进行重复或不失败的肌肉力量，肌肉质量（MQ），最大摄氧量（VO _{2peak）训练的影响}）和老年人的内脏脂肪。这是一项随机对照试验的辅助分析。将36位年龄较大的男性（平均年龄±SD； 67.1±5.1岁）随机分为三组：一组重复失败（RFG，n = 13），另一组重复失败而不重复和RFG重复次数的50％（NFG ，n = 12），第三次重复执行，直到RFG的训练量相等（ENFG，n = 11）。每周进行两次训练，持续20周，训练强度为最大力量的65％至80％。在每个阶段中，个人都从加强锻炼开始，然后在跑步机上进行有氧运动（即步行）。主要终点是下蹲和反向运动跳跃过程中从基线到20周后绝对和相对肌肉力量输出的变化，₂在跑步机上通过最大增量测试进行测试。所有的训练组都有类似的改善，跳跃高度明显提高（从9％到16％）及其所有肌肉力量结局（平均变化范围从2％到7％）（P <.001）。此外，所有组的内脏脂肪厚度均显着降低（从-11到-21％）（P <.001），VO _2peak显着升高（从4到8％）（P <.01），无差异组之间。MQ结果未见变化。在健康的老年男性中，通过反复进行失败或不失败的训练可以促进肌肉力量输出，有氧运动能力和内脏脂肪的类似增加。