Dencker Magnus, Thorsson Ola, Karlsson Magnus K, Lindén Christian, Svensson Jesper, Wollmer Per, Andersen Lars Bo
Department of Clinical Sciences, Malmö Clinical Physiology and Nuclear Medicine Unit, University Hospital MAS, 205 02, Malmö, Sweden.
Eur J Appl Physiol. 2006 Mar;96(5):587-92. doi: 10.1007/s00421-005-0117-1. Epub 2006 Jan 12.
A positive relationship between daily physical activity and aerobic fitness exists in adults. Studies in children have given conflicting results, possibly because of differences in methods used to assess daily physical activity and fitness. No study regarding daily physical activity and fitness in children has been published, where fitness has been assessed by direct measurement of maximum oxygen uptake and related to daily physical activity intensities by accelerometers. We examined 248 children (140 boys and 108 girls), aged 7.9-11.1 years. Maximum workload and maximal oxygen uptake (VO2PEAK) by indirect calorimetry were measured during a maximum bicycle ergometer exercise test. Exercise capacity was adjusted for body mass and (body mass)2/3. Daily physical activity was evaluated by accelerometers, worn around the waist for 4 days. Mean accelerometer counts and time spent in vigorous physical activity were calculated. VO2PEAK was correlated with mean accelerometer counts (r=0.23 for boys and r=0.23 for girls, both P<0.05), but somewhat better with time spent in vigorous activity (r=0.32 for boys, r=0.30 for girls, both P<0.05). All results remained virtually the same regardless of the method used to adjust for differences in body size.
在成年人中，日常身体活动与有氧适能之间存在正相关关系。针对儿童的研究结果相互矛盾，这可能是由于评估日常身体活动和适能所采用的方法存在差异。尚未有关于儿童日常身体活动与适能的研究发表，其中适能是通过直接测量最大摄氧量来评估，并通过加速度计与日常身体活动强度相关联。我们对248名年龄在7.9至11.1岁之间的儿童（140名男孩和108名女孩）进行了研究。在最大自行车测力计运动测试期间，通过间接量热法测量最大工作量和最大摄氧量（VO2PEAK）。运动能力根据体重和体重的2/3进行了调整。通过佩戴在腰部4天的加速度计评估日常身体活动。计算平均加速度计计数和进行剧烈身体活动所花费的时间。VO2PEAK与平均加速度计计数相关（男孩r = 0.23，女孩r = 0.23，均P < 0.05），但与进行剧烈活动所花费的时间相关性稍好一些（男孩r = 0.32，女孩r = 0.30，均P < 0.05）。无论采用何种方法来调整身体大小差异，所有结果基本保持不变。
