Dencker M, Thorsson O, Karlsson M K, Lindén C, Svensson J, Wollmer P, Andersen L B
Department of Clinical Sciences, Lund University, Malmö, Sweden.
Scand J Med Sci Sports. 2006 Aug;16(4):252-7. doi: 10.1111/j.1600-0838.2005.00486.x.
Physical inactivity is hypothesized to be a contributing factor in the development of a variety of diseases. Recommendations for an adequate level of physical activity have been proposed. There are few studies in which the physical activity in children has been objectively assessed. The purpose of this study was to estimate objectively the level of physical activity in Swedish children.
We studied 248 children (140 boys and 108 girls) aged 7.9-11.1 years from Malmö, Sweden. Physical activity was measured with accelerometers. Children were instructed to wear the accelerometers for 4 days. The mean daily activity was expressed as the mean counts per minute of recording. The time that the child spent performing moderate or vigorous activity was calculated by using previously established cutoff points.
The mean daily activity was higher in boys than in girls, 751+/-243 vs 618+/-154 counts/min (P<0.001). All children fulfilled the recommendation for moderate physical activity for 60 min or more per day. Ninety-two percent of the boys and 86% of the girls performed vigorous activity, for 20 min or more per day.
All children, aged 8-11 years, who participated in this study reached the recommended level of physical activity, with boys being more active than girls.
缺乏身体活动被认为是多种疾病发生的一个促成因素。已经提出了关于适当身体活动水平的建议。很少有研究对儿童的身体活动进行客观评估。本研究的目的是客观评估瑞典儿童的身体活动水平。
我们研究了来自瑞典马尔默的248名7.9 - 11.1岁的儿童（140名男孩和108名女孩）。使用加速度计测量身体活动。指导儿童佩戴加速度计4天。平均每日活动量以每分钟记录的平均计数表示。通过使用先前确定的临界点计算儿童进行中度或剧烈活动所花费的时间。
男孩的平均每日活动量高于女孩，分别为751±243次/分钟和618±154次/分钟（P<0.001）。所有儿童均达到了每天进行60分钟或更长时间中度身体活动的建议。92%的男孩和86%的女孩每天进行20分钟或更长时间的剧烈活动。
参与本研究的所有8 - 11岁儿童均达到了建议的身体活动水平，男孩比女孩更活跃。
