Engström L M
Acta Paediatr Scand Suppl. 1980;283:101-5. doi: 10.1111/j.1651-2227.1980.tb15329.x.
Originally 2,144 15-year-old-boys and girls from different parts of Sweden participated in this follow-up study concerning physical activity during leisure time. During a ten year period the drop out amounted to 22%. The main objective of the investigation was to describe variations in trend and scope of physical activity in relation to the individual, the background and environmental variables. The attitude towards physical exercise was very positive. The amount of physical activity did not correspond to this attitude for all young people. The average activity declined between the ages of 15 and 20 from 3.3 hours a week to 1.8 among the girls and from 4.8 to 2.6 among the boys. From 20 to 25 years of age there was, however, an increase from 1.8 to 2.2 for the girls and from 2.6 to 2.9 for the boys. Girls chose recreational activities more often than boys did. The choices of activities were related to social background and educational level.
最初，来自瑞典不同地区的2144名15岁青少年（包括男孩和女孩）参与了这项关于休闲时间体育活动的随访研究。在十年期间，失访率达22%。该调查的主要目的是描述体育活动在趋势和范围上相对于个体、背景及环境变量的变化情况。对体育锻炼的态度非常积极。然而，并非所有年轻人的体育活动量都与这种态度相符。女孩的平均活动量在15至20岁之间从每周3.3小时降至1.8小时，男孩则从4.8小时降至2.6小时。不过，在20至25岁年龄段，女孩的活动量从1.8小时增至2.2小时，男孩从2.6小时增至2.9小时。女孩比男孩更常选择娱乐活动。活动选择与社会背景和教育水平相关。
