Departments of 1Athletic Performance; and 2Physical Education, National Taiwan Normal University, Taipei, Taiwan.
J Strength Cond Res. 2014 Apr;28(4):935-41. doi: 10.1519/JSC.0000000000000289.
The aim of this study was to determine the effects of short-term resistance training combined with systemic hypoxia on muscular performance and body composition. Eighteen resistance-untrained men (21.3 ± 2.0 years, 172.7 ± 5.5 cm, 67.3 ± 9.7 kg) were matched and assigned to 2 experimental groups: performing 6 weeks of squat exercise training under normobaric hypoxia (H, FiO2 = 15%) or normoxia (N). In both groups, subjects performed 3 weekly sessions (a total of 18 sessions) of 3 sets of back squat at 10-repetition maximum with 2 minutes of rest between sets. Dynamic, isometric, and isokinetic leg strength and body composition were measured under normoxia before and after resistance training. Squat 1 repetition maximum (1RM) improved significantly (p ≤ 0.05) after resistance training in both H and N groups (88.9 ± 16.9 to 109.4 ± 17.0 kg and 90.0 ± 12.2 to 105.6 ± 13.3 kg, respectively). However, there were no changes in maximal isometric and isokinetic leg strength, lean body mass, and fat mass after the resistance training in both groups. In addition, no significant differences were observed between H and N groups in squat 1RM, maximal isometric and isokinetic leg strength, and body composition. The major findings of this study suggest that short-term resistance training performed under normobaric hypoxia has no additive beneficial effect on muscular performance and body composition. In practical terms, our data suggest that the use of systemic hypoxia during short-term resistance training is not a viable method to further enhance muscular performance and body composition in previously resistance-untrained men.
本研究旨在确定短期抗阻训练联合系统性低氧对肌肉性能和身体成分的影响。18 名未经抗阻训练的男性（21.3±2.0 岁，172.7±5.5cm，67.3±9.7kg）进行匹配并分配到 2 个实验组：在常压低氧（FiO2=15%）或常氧（N）下进行 6 周深蹲运动训练。在两组中，受试者每周进行 3 次训练（共 18 次），每次 3 组，深蹲至 10 次重复最大，组间休息 2 分钟。在抗阻训练前后，在常氧下测量动态、等长和等速腿部力量和身体成分。在 H 和 N 组中，抗阻训练后深蹲 1 重复最大（1RM）均显著提高（p≤0.05）（分别为 88.9±16.9 至 109.4±17.0kg 和 90.0±12.2 至 105.6±13.3kg）。然而，两组抗阻训练后最大等长和等速腿部力量、瘦体重和体脂均无变化。此外，H 和 N 组之间在深蹲 1RM、最大等长和等速腿部力量以及身体成分方面均无显著差异。本研究的主要发现表明，在常压低氧下进行短期抗阻训练对肌肉性能和身体成分没有额外的有益影响。实际上，我们的数据表明，在短期抗阻训练期间使用系统性低氧不是进一步提高未经抗阻训练男性肌肉性能和身体成分的可行方法。
