男性的体力活动和冠心病风险:运动周期的持续时间能预测风险吗?
I M Lee1, H D Sesso, R S Paffenbarger
1Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA. i-min.lee@channing.harvard.edu
在体力活动上花费的总能量,而不是运动持续时间,显著降低了冠心病 (CHD) 的风险. 累积的较短的炼时间与较长的炼时间一样有效,在总能耗相似时,可以降低CHD风险.
科学领域:
- 心脏病学 心脏病学
- 预防医学 预防医学
- 运动生理学 运动生理学
背景情况:
- 身体活动与降低冠心病 (CHD) 风险有关.
- 对于降低CHD风险而言,运动情节持续时间与总能耗的重要性仍然不清楚.
研究的目的:
- 为了调查运动情节的持续时间是否会影响冠心病 (CHD) 风险.
- 为了确定是否累积较短的炼课程在减少CHD风险方面与较长的课程一样有效,当总能源支出相似时.
主要方法:
- 从1988年到1993年,对7307名哈佛大学的校友进行了未来的跟进.
- 身体活动的基线评估,包括步行,爬楼梯,体育和娱乐活动,并记录每次发作的频率和平均持续时间.
- 在随访期间监测冠心病 (CHD) 的发展.
主要成果:
- 在年龄调整后的分析中,较长的运动周期预测了较低的心脏病风险 (P趋势=0.04).
- 考虑到总能耗和混杂因素后,运动时间对CHD风险没有独立的影响 (P趋势=0.25).
- 较高的总能耗在年龄调整 (P趋势=0.009) 和多变量 (P趋势=0.046) 分析中显著预测降低了CHD风险.
结论:
- 身体活动显然与降低冠心病 (CHD) 风险有关.
- 累积较短的体育活动课程似乎与单个较长的课程在降低心脏病风险方面同样有效.
- 这些发现支持了允许灵活炼会话积累的建议,可能会鼓励更久坐的人增加体育活动.
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