Sandercock Gavin, Voss Christine, Gladwell Valerie
Centre for Sports and Exercise Science, School of Biological Sciences, University of Essex, Colchester, UK.
J Sports Sci. 2008 Jul;26(9):953-7. doi: 10.1080/02640410801910301.
Recent international normative data for the 20-m shuttle-run test demonstrated a below-average performance index for UK children. The aims of the present study were to create an international comparison of 20-m shuttle-run test performance in a sample of English children and to identify age- and sex-specific differences in test performance. Mass, stature, body mass index, and 20-m shuttle-run test performance were measured in 2041 children aged 11-15 years (963 boys, 1078 girls). Performance was expressed as maximum running velocity and a performance index was created by generating z-scores. The shuttle-run test performance index was higher than the existing published value (-0.046, 95% confidence interval [CI] -0.070 to -0.022) for all children (0.061, 95% CI = 0.006 to 0.115), for boys (0.075, 95% CI = -0.022 to 0.171), and for girls (0.048, 95% CI = -0.010 to 0.106). Boys' relative performance increased significantly (F = 4.43, P = 0.002) throughout the measured age range, whereas girls' relative performance tended to decrease (F = 1.98, P = 0.096). The results were favourable when compared with existing values. Differences in performance index may be due to the different geographical areas from which present and past samples were drawn. Reasons for differences in the performance indices between boys and girls warrant further investigation.
20米往返跑测试的最新国际规范数据显示，英国儿童的表现指数低于平均水平。本研究的目的是对一组英国儿童的20米往返跑测试表现进行国际比较，并确定测试表现中特定年龄和性别的差异。对2041名11至15岁的儿童（963名男孩，1078名女孩）测量了体重、身高、体重指数和20米往返跑测试表现。表现以最大跑步速度表示，并通过生成z分数创建表现指数。所有儿童（0.061，95%置信区间[CI]=0.006至0.115）、男孩（0.075，95%CI=-0.022至0.171）和女孩（0.048，95%CI=-0.010至0.106）的往返跑测试表现指数均高于已发表的现有值（-0.046，95%置信区间[-0.070至-0.022]）。在整个测量年龄范围内，男孩的相对表现显著增加（F=4.43，P=0.002），而女孩的相对表现则呈下降趋势（F=1.98，P=0.096）。与现有值相比，结果较为理想。表现指数的差异可能归因于当前和过去样本所选取的不同地理区域。男孩和女孩表现指数差异的原因值得进一步研究。
