Warburton Darren E R, Bredin Shannon S D
Physical Activity Promotion and Chronic Disease Prevention Unit, University of British Columbia, Vancouver, British Columbia, Canada.
Curr Opin Cardiol. 2017 Sep;32(5):541-556. doi: 10.1097/HCO.0000000000000437.
The health benefits of physical activity and exercise are clear; virtually everyone can benefit from becoming more physically active. Most international guidelines recommend a goal of 150 min/week of moderate-to-vigorous intensity physical activity. Many agencies have translated these recommendations to indicate that this volume of activity is the minimum required for health benefits. However, recent evidence has challenged this threshold-centered messaging as it may not be evidence-based and may create an unnecessary barrier to those who might benefit greatly from simply becoming more active. This systematic review evaluates recent systematic reviews that have examined the relationship between physical activity and health status.
Systematic reviews and/or meta-analyses (based largely on epidemiological studies consisting of large cohorts) have demonstrated a dose-response relationship between physical activity and premature mortality and the primary and secondary prevention of several chronic medical conditions. The relationships between physical activity and health outcomes are generally curvilinear such that marked health benefits are observed with relatively minor volumes of physical activity.
These findings challenge current threshold-based messaging related to physical activity and health. They emphasize that clinically relevant health benefits can be accrued by simply becoming more physically active. VIDEO ABSTRACT: http://links.lww.com/HCO/A42.
体育活动和锻炼对健康的益处是显而易见的；几乎每个人都能从增加身体活动中获益。大多数国际指南建议，中等至剧烈强度的体育活动目标为每周150分钟。许多机构已将这些建议解读为，这一活动量是获得健康益处所需的最低量。然而，最近的证据对这种以阈值为中心的信息提出了挑战，因为它可能缺乏循证依据，并且可能给那些只要增加活动量就能大幅获益的人造成不必要的障碍。本系统评价评估了最近那些研究体育活动与健康状况之间关系的系统评价。
系统评价和/或荟萃分析（主要基于大型队列的流行病学研究）表明，体育活动与过早死亡以及几种慢性疾病的一级和二级预防之间存在剂量反应关系。体育活动与健康结果之间的关系通常呈曲线，即相对少量的体育活动就能带来显著的健康益处。
这些发现对当前基于阈值的体育活动与健康相关信息提出了挑战。它们强调，只要增加身体活动量就能获得临床上相关的健康益处。视频摘要：http://links.lww.com/HCO/A42 。
