Graduate School of Physical Education, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea.
Appl Physiol Nutr Metab. 2012 Dec;37(6):1019-27. doi: 10.1139/h2012-084. Epub 2012 Aug 14.
The primary purpose of this study was to investigate the effects of high-intensity exercise training under relatively equal energy expenditure on whole body fat and abdominal fat loss, and cardiorespiratory fitness. Twenty-two untrained middle-aged Korean females were randomized into one of the following groups: control, low-intensity training group (LI), and high-intensity training group (HI). Subjects completed 14 weeks of training at 50% maximal oxygen consumption (LI) or 70% maximal oxygen consumption (HI) with the volume of exercise equated relative to kilograms of body weight. Weekly exercise volumes were 13.5 METs⋅h/week for the first 4 weeks, 18 METs⋅h/week for next 5 weeks, and 22.5 METs⋅h/week for the final 5 weeks. Data were analyzed using 2-way repeated measures ANOVA with post hoc test, using Bonferroni's correction. HI showed significant reductions in fat mass (p < 0.05), total abdominal fat (p < 0.01), and subcutaneous abdominal fat (p < 0.01). LI reduced total abdominal fat (p < 0.05), but there were no other significant changes found in the control or LI groups. Maximal oxygen consumption was enhanced in both HI and LI with no significant group difference. High-density lipoprotein cholesterol increased significantly in HI (p < 0.05). IL-6, C-reactive protein, TNF-α, and other blood lipids were unaltered following training. Results indicate that high-intensity exercise training is more beneficial in whole body and abdominal fat loss; however, cardiorespiratory enhancement shows a dose-response relationship with weekly exercise volume. It is suggested that 14 weeks of aerobic exercise training at either high- or low-intensity is not sufficient enough to induce changes in levels of inflammatory proteins.
本研究的主要目的是探讨在相对相等能量消耗的情况下，高强度运动训练对全身脂肪和腹部脂肪减少以及心肺功能适应性的影响。22 名未经训练的中年韩国女性被随机分为以下三组：对照组、低强度训练组（LI）和高强度训练组（HI）。受试者以 50%最大摄氧量（LI）或 70%最大摄氧量（HI）完成 14 周的训练，运动强度与体重的相对运动量相等。前 4 周每周运动 13.5 METs·h/周，接下来 5 周每周 18 METs·h/周，最后 5 周每周 22.5 METs·h/周。数据采用 2 因素重复测量方差分析，并用 Bonferroni 校正进行事后检验。HI 组脂肪量（p<0.05）、总腹部脂肪（p<0.01）和皮下腹部脂肪（p<0.01）均显著减少。LI 组总腹部脂肪减少（p<0.05），但对照组和 LI 组均无其他显著变化。HI 和 LI 组最大摄氧量均有提高，且组间无显著差异。高密度脂蛋白胆固醇在 HI 组显著增加（p<0.05）。IL-6、C 反应蛋白、TNF-α 和其他血脂在训练后没有变化。结果表明，高强度运动训练对全身和腹部脂肪减少更有益；然而，心肺功能增强与每周运动量呈剂量反应关系。建议有氧运动训练 14 周，无论是高强度还是低强度，都不足以引起炎症蛋白水平的变化。
