Ohkawara K, Tanaka S, Miyachi M, Ishikawa-Takata K, Tabata I
Health Promotion and Exercise Program, National Institute of Health and Nutrition, Shinjuku-ku, Tokyo, Japan.
Int J Obes (Lond). 2007 Dec;31(12):1786-97. doi: 10.1038/sj.ijo.0803683. Epub 2007 Jul 17.
It has been suggested that exercise has preferential effects on visceral fat reduction. However, the dose-response effect remains unclear because of limited evidence from individual studies. The purpose of this study was to systematically review the current literature to establish whether reduction of visceral fat by aerobic exercise has a dose-response relationship.
A database search was performed (PubMed, 1966-2006) with appropriate keywords to identify studies exploring the effects of aerobic exercise as a weight loss intervention on visceral fat reduction. Visceral fat reduction was expressed as the percentage of visceral fat change per week (%DeltaVF/w). The energy expenditure by aerobic exercise was expressed as Sigma (metabolic equivalents x h per week (METs x h/w)).
Nine randomized control trials and seven non-randomized control trials were selected. In most of the studies, the subjects performed aerobic exercise generating 10 METs x h/w or more. Among all the selected groups (582 subjects), visceral fat decreased significantly (P<0.05) in 17 groups during the intervention, but not in the other 4 groups. There was no significant relationship between METs x h/w from aerobic exercise and %DeltaVF/w in all the selected groups. However, when subjects with metabolic-related disorders were not included (425 subjects), METs x h/w from aerobic exercise had a significant relationship with %DeltaVF/w (r=-0.75). Moreover, visceral fat reduction was significantly related to weight reduction during aerobic exercise intervention, although a significant visceral fat reduction may occur without significant weight loss.
These results suggest that at least 10 METs x h/w in aerobic exercise, such as brisk walking, light jogging or stationary ergometer usage, is required for visceral fat reduction, and that there is a dose-response relationship between aerobic exercise and visceral fat reduction in obese subjects without metabolic-related disorders.
有人提出运动对减少内脏脂肪有优先作用。然而，由于个别研究的证据有限，剂量反应效应仍不清楚。本研究的目的是系统回顾当前文献，以确定有氧运动减少内脏脂肪是否存在剂量反应关系。
进行数据库检索（PubMed，1966 - 2006年），使用适当的关键词来识别探索有氧运动作为减肥干预措施对减少内脏脂肪影响的研究。内脏脂肪减少量表示为每周内脏脂肪变化的百分比（%DeltaVF/w）。有氧运动的能量消耗表示为每周代谢当量总和（代谢当量×小时/周（METs×h/w））。
选择了9项随机对照试验和7项非随机对照试验。在大多数研究中，受试者进行的有氧运动产生的能量为10 METs×h/w或更多。在所有选定的组（582名受试者）中，17组在干预期间内脏脂肪显著减少（P<0.05），但其他4组没有。在所有选定的组中，有氧运动的METs×h/w与%DeltaVF/w之间没有显著关系。然而，当不包括患有代谢相关疾病的受试者（425名受试者）时，有氧运动的METs×h/w与%DeltaVF/w有显著关系（r = -0.75）。此外，在有氧运动干预期间，内脏脂肪减少与体重减轻显著相关，尽管在没有显著体重减轻的情况下也可能发生显著的内脏脂肪减少。
这些结果表明，为了减少内脏脂肪，有氧运动至少需要10 METs×h/w，如快走、轻度慢跑或使用固定测力计，并且在没有代谢相关疾病的肥胖受试者中，有氧运动与内脏脂肪减少之间存在剂量反应关系。
