Absolute versus relative intensity of physical activity in a dose-response context
Absolute versus relative intensity of physical activity in a dose-response context
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DOI：
10.1097/00005768-200106001-00008
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发表时间：
2001-06-01
期刊：
影响因子：
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通讯作者：
Shephard, RJ
中科院分区：
文献类型：
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作者：
Shephard, RJ
目的：研究相对与绝对强度的体力活动在人口健康的背景下的重要性。方法：一个标准的计算机检索的文献进行了补充，审查广泛的个人档案。结果如下：共识报告（D类证据）通常建议在人群健康的背景下进行适度而不是剧烈的体力活动。许多现有文献提供了C类证据。它经常混淆相对强度与绝对强度或每周总运动量的问题。在心血管健康方面，有一些证据表明：除了最低量的体力活动外，努力的阈值强度可能高达6 MET。降低血压和预防中风似乎最好通过中等而不是高相对强度的体力活动来实现，代谢健康的许多方面取决于活动的总量;中等相对强度的努力在动员体内脂肪方面更有效，但相对强度更大可能有助于增加运动后的能量消耗。硬相对强度似乎需要增加骨密度，但这可能反映了活动量的相关增加。剧烈的相对运动强度会引起短暂的免疫抑制。对于预防各种类型的癌症，相对或绝对的最佳努力强度仍然没有得到解决。运动对情绪状态的急性影响还需要进一步研究;长期的好处似乎与适度而不是艰苦的相对强度有关。结论：相对与绝对努力强度的重要性取决于所期望的健康结果，许多问题仍有待解决。进展将取决于更精确的流行病学方法。评估能量消耗和研究，等同于不同相对强度之间的总能量消耗。有必要注重提高按质量调整的预期寿命。
Purpose: To examine the importance of relative versus absolute intensities of physical activity in the context of population health. Methods: A standard computer-search of the literature was supplemented by review of extensive personal files. Results: Consensus reports (Category D Evidence) have commonly recommended moderate rather than hard physical activity in the context of population health. Much of the available literature provides Category C Evidence. It has often confounded issues of relative intensity with absolute intensity or total weekly dose of exercise. In terms of cardiovascular health, there is some evidence: for a threshold intensity of effort, perhaps as high as 6 METs, in addition to a minimum volume of physical activity. Decreases in blood pressure and prevention of stroke seem best achieved by moderate rather than high relative intensities of physical activity, Many aspects of metabolic health depend on the total volume of activity; moderate relative intensities of effort are more effective in mobilizing body fat, but harder relative intensities may help to increase energy expenditures postexercise. Hard relative intensities seem needed to augment bone density, but this may reflect an associated increase in volume of activity. Hard relative intensities of exercise induce a transient immunosuppression. The optimal intensity of effort, relative or absolute, for protection against various types of cancer remains unresolved. Acute effects of exercise on mood state also require further study; long-term benefits seem associated with a moderate rather than a hard relative intensity of effort. Conclusions: The importance of relative versus absolute intensity of effort depends on the desired health outcome, and many issues remain to be resolved. Progress will depend on more precise epidemiological methods. of assessing energy expenditures and studies that equate total energy expenditures between differing relative intensities. There is a need to focus on gains in quality-adjusted life expectancy.