Riddoch Chris J, Mattocks Calum, Deere Kevin, Saunders Jo, Kirkby Jo, Tilling Kate, Leary Sam D, Blair Steven N, Ness Andy R
Sport and Exercise Science, School for Health, University of Bath, Bath, UK.
Arch Dis Child. 2007 Nov;92(11):963-9. doi: 10.1136/adc.2006.112136. Epub 2007 Sep 13.
To measure the levels and patterns of physical activity, using accelerometers, of 11-year-old children participating in the Avon Longitudinal Study of Parents and Children (ALSPAC).
Cross-sectional analysis.
ALSPAC is a birth cohort study located in the former county of Avon, in the southwest of England. This study used data collected when the children were 11 years old.
5595 children (2662 boys, 2933 girls). The children are the offspring of women recruited to a birth cohort study during 1991-2. The median age (95% CI) of the children is now 11.8 (11.6 to 11.9) years.
Physical activity was measured over a maximum of 7 consecutive days using the MTI Actigraph accelerometer.
Level and pattern of physical activity.
The median physical activity level was 580 counts/min. Boys were more active than girls (median (IQR) 644 (528-772) counts/min vs 529 (444-638) counts/min, respectively). Only 2.5% (95% CI 2.1% to 2.9%) of children (boys 5.1% (95% CI 4.3% to 6.0%), girls 0.4% (95% CI 0.2% to 0.7%) met current internationally recognised recommendations for physical activity. Children were most active in summer and least active in winter (difference = 108 counts/min). Both the mother and partner's education level were inversely associated with activity level (p for trend <0.001 (both mother and partner)). The association was lost for mother's education (p for trend = 0.07) and attenuated for partner's education (p for trend = 0.02), after adjustment for age, sex, season, maternal age and social class.
A large majority of children are insufficiently active, according to current recommended levels for health.
使用加速度计测量参与雅芳父母与儿童纵向研究（ALSPAC）的11岁儿童的身体活动水平和模式。
横断面分析。
ALSPAC是一项位于英格兰西南部原雅芳郡的出生队列研究。本研究使用了儿童11岁时收集的数据。
5595名儿童（2662名男孩，2933名女孩）。这些儿童是1991 - 1992年招募到出生队列研究中的女性的后代。儿童的年龄中位数（95%可信区间）现在为11.8（11.6至11.9）岁。
使用MTI Actigraph加速度计在最多连续7天内测量身体活动。
身体活动水平和模式。
身体活动水平的中位数为580次/分钟。男孩比女孩更活跃（中位数（四分位间距）分别为644（528 - 772）次/分钟和529（444 - 638）次/分钟）。只有2.5%（95%可信区间2.1%至2.9%）的儿童（男孩5.1%（95%可信区间4.3%至6.0%），女孩0.4%（95%可信区间0.2%至0.7%））达到了当前国际认可的身体活动建议。儿童在夏季最活跃，在冬季最不活跃（差异 = 108次/分钟）。母亲和伴侣的教育水平均与活动水平呈负相关（母亲和伴侣的趋势p值均 <0.001）。在调整年龄、性别、季节、母亲年龄和社会阶层后，母亲教育水平的相关性消失（趋势p值 = 0.07），伴侣教育水平的相关性减弱（趋势p值 = 0.02）。
根据当前的健康推荐水平，绝大多数儿童的身体活动不足。
