青少年身高的日变化规律

Pattern of daytime variation of teenager's height

为了探讨青少年身高的日变化规律,以大连市7～17岁的小学、初中和高中的学生569名（男生291人,女生278人）为研究对象,在08∶00、10∶00、12∶00、14∶00和16∶00分别进行了身高的测量.结果：上午与下午的身高差值,男生在0.73～0.92 cm,均值为0.80 cm;女生在0.62～0.90 cm,均值为0.70 cm.男女青少年身高的日均值时段出现在12∶00.青少年身高在一日中发生变化,因此,在下午测量时,为了提高测试效率及测量的客观性,建议制定修正身高指标测量误差的系数.

To probe into the pattern of daytime variation of teenager＇ s height, the authors based their study object on 569 ages 7 - 17 students in elementary schools,junior high schools and high schools in Dalian city （291 male students and 278 female students） ,measured their height at 08：00,10：00, 12：00, 14：00 and 16：00 respectively, and revealed the following findings： The difference between the heights of ages 7 - 17 teenagers measured in this research in the morning and afternoon is between 0.73 and 0.92 cm （ averagely 0.80 cm） for male students and between 0.62 and 0.90 cm （averagely 0.70 cm ） for female students; the average height of male and female teenagers occurs at 12：00. The height varies in a day. Therefore,the authors suggested that a coefficient of correction for correcting height index measurement error should be established when the height is measured in the afternoon, so as to enhance measurement efficiency and measurement objectivity.