PROFITH "PROmoting FITness and Health through physical activity" Research Group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Ctra. de Alfacar s/n, 18071,, Granada, Spain.
Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.
Eur J Appl Physiol. 2017 Nov;117(11):2295-2307. doi: 10.1007/s00421-017-3717-7. Epub 2017 Sep 20.
(1) To examine the comparability, i.e., discriminatory power, in a preschooler test (PREFIT 20-m shuttle-run test) and the 20mSRT-Original in 5-6-year-olds; (2) to provide an equation to estimate VOmax from the 20mSRT-PREFIT.
138 participants aged 5-6 years performed the 20mSRT-PREFIT and the 20mSRT-Original in a counterbalanced order. Total test duration, completed stages, maximum speed and maximum heart rate were registered.
Participants finished stages from 2-10 in the 20mSRT-PREFIT, whereas stages 1-5 were completed in the 20mSRT-Original and a null was registered, showing the original version a lower discriminatory power. We also observed that the higher the cardiorespiratory fitness level the more comparable were the tests, i.e., - 0.04 km h difference between tests in the fittest participants (i.e., maximum speed ≥ 9.5 km h). Using the original equation proposed by Leger and colleagues in 1988 and based on the estimation regression of maximum speed in the 20mSRT-Original from the PREFIT version, we computed a new equation to estimate VOmax from the 20mSRT-PREFIT: Y = 44.657 + 1.795X - 2.601X + 0.0852X X (r = 0.77; r = 0.59; SEE = 1.25 ml kg min or 2.59% of estimated mean VOmax = 48.38 ml kg min), where X is the 20mSRT-PREFIT maximum speed (km h) and X is the age of participants. The 20mSRT-PREFIT resulted in a significantly higher maximum heart rate than the 20mSRT-Original.
The 20mSRT-PREFIT has higher discriminatory power than the 20mSRT-Original. Our study provides for the first time an opportunity to estimate VOmax in preschoolers and children based on the 20mSRT-PREFIT maximum speed and the age of participants.
（1）检验幼儿预测试（PREFIT 20 米穿梭跑测试）与 20 米 SRT-Original 在 5-6 岁儿童中的可比性，即区分能力；（2）提供一个从 20mSRT-PREFIT 估算最大摄氧量的方程。
138 名 5-6 岁的参与者以平衡的顺序进行 20mSRT-PREFIT 和 20mSRT-Original。记录总测试持续时间、完成的阶段、最大速度和最大心率。
参与者在 20mSRT-PREFIT 中完成了第 2-10 阶段，而在 20mSRT-Original 中完成了第 1-5 阶段，并且记录了一个零值，这表明原始版本的区分能力较低。我们还观察到，心肺适能水平越高，测试的可比性越高，即 - 在身体素质最好的参与者中（即最大速度≥9.5km/h），两个测试之间的差异为 0.04km/h。我们使用了 Leger 等人在 1988 年提出的原始方程，并基于 20mSRT-Original 中最大速度的估计回归，从 PREFIT 版本中计算出一个新的方程来估计 20mSRT-PREFIT 的最大摄氧量：Y=44.657+1.795X-2.601X+0.0852X^2（r=0.77；r^2=0.59；SEE=1.25ml·kg·min 或估计平均最大摄氧量的 2.59%=48.38ml·kg·min），其中 X 是 20mSRT-PREFIT 的最大速度（km/h），X 是参与者的年龄。与 20mSRT-Original 相比，20mSRT-PREFIT 导致的最大心率显著更高。
20mSRT-PREFIT 的区分能力高于 20mSRT-Original。我们的研究首次提供了基于 20mSRT-PREFIT 最大速度和参与者年龄估算幼儿和儿童最大摄氧量的机会。
