Department of Kinesiology, California State University, 333 S. Twin Oaks Valley Road, UNIV 320, San Marcos, CA 92096-0001, USA.
Eur J Appl Physiol. 2013 Sep;113(9):2361-9. doi: 10.1007/s00421-013-2672-1. Epub 2013 Jun 11.
This study aimed to compare changes in maximal oxygen uptake (VO2max) in response to two regimens of chronic interval training.
Twenty healthy sedentary women (mean ± SD age and VO2max = 23.0 ± 5.7 years and 30.1 ± 4.4 mL kg(-1) min(-1), respectively) were randomized to complete 12 weeks of one of two interval training regimes, while an additional seven women served as controls. Training was performed 3 days week(-1) on a cycle ergometer and consisted of 6-10 bouts of 1 min duration at lower (60-80 % W max = LO, n = 10) or more intense (80-90 % W max = HI, n = 10) workloads separated by a brief recovery. Every 3 weeks, measures of VO2max and W max were repeated to assign new training intensities. Changes in blood pressure and body composition were also examined.
Data revealed significant (p < 0.001) improvements in VO2max in LO (22.3 ± 6.9 %) and HI (21.9 ± 11.6 %) that were similar (p > 0.05) between groups. Approximately 60 % of the increase in VO2max in HI was observed in the initial 3 weeks, compared to only 20 % in LO. No change (p > 0.05) in body weight or body composition was revealed in response to training. Results demonstrate that a relatively prolonged regimen of moderate or more intense interval training induces similar improvements in cardiorespiratory fitness, although HI induced greater increases in VO2max early on in training than LO. Completion of more intense interval training may be an effective means to expedite increases in VO2max soon after initiation of exercise training.
本研究旨在比较两种慢性间歇训练方案对最大摄氧量（VO2max）的变化。
20 名健康的久坐女性（平均年龄和 VO2max 分别为 23.0 ± 5.7 岁和 30.1 ± 4.4 mL kg(-1) min(-1)）被随机分为两组，分别完成 12 周的一种间歇训练方案，另外 7 名女性作为对照组。训练在自行车测力计上进行，每周 3 天，包括 6-10 次 1 分钟的运动，运动强度分别为低强度（60-80% W max = LO，n = 10）或高强度（80-90% W max = HI，n = 10），两次运动之间有短暂的恢复期。每 3 周重复测量 VO2max 和 W max，以确定新的训练强度。还检查了血压和身体成分的变化。
数据显示，低强度（22.3 ± 6.9%）和高强度（21.9 ± 11.6%）组的 VO2max 均有显著（p < 0.001）提高，两组之间无显著差异（p > 0.05）。HI 组 VO2max 的增加约有 60%发生在最初的 3 周，而 LO 组仅为 20%。训练后体重或身体成分无变化（p > 0.05）。结果表明，相对较长时间的中等或高强度间歇训练可引起心肺功能的相似改善，尽管 HI 在训练早期比 LO 引起更大的 VO2max 增加。完成更剧烈的间歇训练可能是在开始运动训练后不久加快 VO2max 增加的有效方法。
