CHRONIC DISEASE IN FORMER COLLEGE-STUDENTS .45. TIME TRENDS IN PHYSICAL-ACTIVITY AMONG COLLEGE ALUMNI, 1962-1988
CHRONIC DISEASE IN FORMER COLLEGE-STUDENTS .45. TIME TRENDS IN PHYSICAL-ACTIVITY AMONG COLLEGE ALUMNI, 1962-1988
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DOI：
10.1093/oxfordjournals.aje.a116387
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发表时间：
1992-04-15
影响因子：
5
通讯作者：
HSIEH, CC
中科院分区：
文献类型：
--
作者：
LEE, IM;PAFFENBARGER, RS;HSIEH, CC
流行病学文献中几乎没有直接证据来支持人们普遍认为个人的身体活动行为多年来会发生变化的观点。为了提供数据，作者前瞻性地研究了 6,092 名哈佛大学校友（随访开始时的平均年龄为 43 岁）的身体活动模式，这些校友在 1962 年或 1966 年、1977 年和 1988 年回答了问卷，并声称自己在此期间没有心血管疾病和癌症。 1962 年或 1966 年至 1977 年期间，能量支出中位数有所增加，但 1977 年至 1988 年期间趋于稳定。然而，1977 年至 1988 年各年龄组能量支出估计值之间的等级相关系数在 0.36 至 0.41 之间（相比之下，Quetelet 指数为 0.81-0.84，Quetelet 指数为 0.60-0.65）。当前每天吸烟的数量），这意味着个人水平的体力活动并不是恒定的。对于有大学体育参与数据的 4,238 名校友，1-7 年后大学活动与校友活动之间的排名相关系数更低，范围为 0.05 至 0.17（相比之下，Quetelet 指数为 0.31-0.58）。因此，短期内评估的个体体力活动可能不能代表长期活动的有效指标。区分每周持续消耗 2,500 kcal 热量的校友的特征如下：基线时、年龄较大、超重和吸烟；在大学期间，我没有成为校队运动员，参加体育运动的时间也更少。
Little direct evidence exists in the epidemiologic literature to support the widely held belief that an individual's physical activity behavior varies over the years. To provide data, the authors prospectively studied patterns of physical activity among 6,092 Harvard College alumni (average age at the start of follow-up, 43 years) who responded to questionnaires in 1962 or 1966, 1977, and 1988, and who declared themselves free of cardiovascular disease and cancer throughout that period. The median energy expenditure increased between 1962 or 1966 and 1977, but stabilized between 1977 and 1988. However, rank correlation coefficients between estimates of energy expenditure in 1977 and 1988 ranged from 0.36 to 0.41 for the various age groups (compared with 0.81-0.84 for the Quetelet index, and 0.60-0.65 for the current number of cigarettes smoked per day), implying that physical activity at the individual level was not constant. For 4,238 alumni for whom data on collegiate sports participation were available, the rank correlation coefficients between collegiate activity and alumni activity 1-7 decades later were even lower, ranging from 0.05 to 0.17 (compared with 0.31-0.58 for the Quetelet index). Thus, physical activity assessed over a short time period in an individual may not be a valid proxy for activity over the long term. The characteristics that distinguished alumni who consistently expended 2,500 kcal/week were as follows: at baseline, older age, overweight, and cigarette smoking; and during college, not having been a varsity athlete and fewer hours playing sports.