(1.College of Physical Education, Liaoning Normal University,Dalian 116029,China；2.Sport Centre,Jilin University,Changchun 130012,China)
Abstract: 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.
Key words: height; daytime variation; teenager
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