Talbot Laura A, Fleg Jerome L, Metter E Jeffrey
The Johns Hopkins University, School of Nursing, Baltimore, MD 21205-2110, USA.
Prev Med. 2003 Jul;37(1):52-60. doi: 10.1016/s0091-7435(03)00058-6.
We examined secular trends in leisure-time physical activities (LTPA) in health-conscious men (n = 1359) from 1958 to 1998 and in women (n = 839) from 1978 to 1998, who were participants of the Baltimore Longitudinal Study of Aging (BLSA).
LTPA was the self-reported time spent performing 97 activities, and was converted to metabolic equivalent of oxygen uptake (MET) minutes per day. Evaluations of LTPA were averaged for each decade. The prevalence of a sedentary lifestyle in each decade was assessed based on compliance with widely publicized recommendations for participation in physical activity. All analyses were adjusted for age, education, and race differences across decades.
Median high-intensity LTPA, defined as activities >/=6 METs, increased from 30 to 80 MET min/day from the 1960s to the 1990s for men (P < 0.01) but did not change between the 1970s and the 1990s in women. Moderate-intensity LTPA, defined as 4-5.9 METs, did not change significantly over these periods in either sex. The percentage of sedentary men, defined as those performing <40 MET min/day of high-intensity LTPA, declined across the four decades, whereas for women it did not change significantly.
In a health-conscious sample across a broad age range, national recommendations appear to have made modest progress in decreasing the proportion of sedentary adults.
我们研究了1958年至1998年参加巴尔的摩纵向衰老研究（BLSA）的有健康意识男性（n = 1359）以及1978年至1998年参加该研究的女性（n = 839）休闲时间体育活动（LTPA）的长期趋势。
LTPA是自我报告的进行97项活动所花费的时间，并转换为每天的氧摄取代谢当量（MET）分钟数。对每个十年的LTPA评估进行平均。根据是否符合广泛宣传的体育活动参与建议，评估每个十年久坐不动生活方式的患病率。所有分析均针对不同十年间的年龄、教育程度和种族差异进行了调整。
定义为活动强度≥6 METs的高强度LTPA，男性从20世纪60年代到90年代从30 MET分钟/天增加到80 MET分钟/天（P < 0.01），而女性在20世纪70年代到90年代没有变化。定义为4 - 5.9 METs的中等强度LTPA在这两个时期内两性均无显著变化。定义为高强度LTPA每天进行时间<40 MET分钟的久坐男性比例在这四个十年中有所下降，而女性则没有显著变化。
在一个广泛年龄范围内有健康意识的样本中，国家建议在降低久坐成年人比例方面似乎取得了一定进展。
