Centre de Recherche de l'Hôpital Sainte-Justine, Université de Montréal, Montréal, Canada.
Int J Behav Nutr Phys Act. 2012 Jul 16;9:87. doi: 10.1186/1479-5868-9-87.
The relationship between early childhood television viewing and physical fitness in school age children has not been extensively studied using objective outcome measures.
Using a sample of 1314 children from the Québec Longitudinal Study of Child Development, we examine the association between parental reports of weekly hours of television viewing, assessed at 29 and 53 months of age, and direct measures of second grade muscular fitness using performances on the standing long jump test (SLJ) and fourth grade waist circumference.
Controlling for many potentially confounding child and family variables, each hour per week of television watched at 29 months corresponded to a .361 cm decrease in SLJ, 95% CI between -.576 and -.145. A one hour increase in average weekly television exposure from 29 to 53 months was associated with a further .285 cm reduction in SLJ test performance, 95% CI between -.436 and -.134 cm and corresponded to a .047 cm increase in waistline circumference, 95% CI between .001 and .094 cm.
Watching television excessively in early childhood, may eventually compromise muscular fitness and waist circumference in children as they approach pubertal age.
使用客观结果测量方法，对于儿童早期看电视时间与学龄儿童身体健康之间的关系，尚未进行广泛研究。
利用魁北克儿童发展纵向研究的 1314 名儿童样本，我们在二年级时通过站立跳远测试（SLJ）和四年级时通过腰围来检查父母报告的每周看电视时间（在 29 个月和 53 个月时评估）与第二年级肌肉健康之间的关联。
在控制了许多潜在的混杂儿童和家庭变量后，29 个月时每周每看一小时电视，对应的站立跳远距离减少.361 厘米，95%置信区间为 -.576 至 -.145。从 29 个月到 53 个月期间，每周平均看电视时间增加一小时，与 SLJ 测试成绩进一步降低.285 厘米相关，95%置信区间为 -.436 至 -.134 厘米，与腰围增加.047 厘米相关，95%置信区间为.001 至.094 厘米。
儿童在幼年时期过度看电视，可能最终会损害他们在接近青春期时的肌肉健康和腰围。
