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美国疾病控制中心和美国运动医学会认为,对无运动习惯或运动不足的成年人每周绝大部分日子每天累积的中等强度运动时间>30 min对健康有利。这意见与过去的较大强度运动的观念不同,为此,就冠心病(CHD)危险因素和大于这一最小推荐量的剧烈运动水平之间的关系进行了研究。其设计的基础是,如果步行具有较好的健康影响,那么增大运动强度,对一些危险因素的改善作用就不大。
The Centers for Disease Control and the American College of Sports Medicine believe that adults who exercise or underuse for more than 30 minutes per day accumulate more than 30 minutes of moderate-intensity physical activity per day on most days of the week. This opinion is different from the notion of greater intensity exercise in the past, and therefore, the relationship between risk factors for coronary heart disease (CHD) and strenuous exercise levels greater than this minimum recommended level was studied. The basis of its design is that if walking has a good health effect, then increase the intensity of exercise, some of the risk factors to improve the little effect.