Nevill Alan M, DE Menezes-Junior Francisco José, DE Jesus Íncare Correa, DE Fatima Aguiar Lopes Maria, Corazza Patricia Ribeiro Paes, Tadiotto Maiara Cristina, Mota Jorge, Leite Neiva
Faculty of Education, Health and Wellbeing, University of Wolverhampton, Walsall Campus, Walsall, UNITED KINGDOM.
Department of Physical Education, Federal University of Paraná, Curitiba, BRAZIL.
Med Sci Sports Exerc. 2021 Aug 1;53(8):1624-1629. doi: 10.1249/MSS.0000000000002637.
Recently, doubts have been raised concerning the validity of the 20-m shuttle run test (20mSRT) to predict cardiorespiratory fitness (CRF) in youth. Despite these doubts, authors continue to provide powerful evidence that CRF can be predicted reliably using the 20mSRT albeit using contrasting models. Therefore, we aimed to compare a new linear model with an alternative allometric model to predict CRF (peak oxygen uptake, V˙O2peak) using the 20mSRT.
The study included 148 adolescents (43% girls) age 13.37 ± 1.84 yr. Adolescents were randomly assigned to validation (n = 91) and cross-validation (n = 57) groups. V˙O2peak was measured using a gas analyzer in both maximal exercise tests in the laboratory and the 20mSRT. Multiple linear regression methods were applied to develop the linear models using the 20mSRT (laps), body mass index, and body fat percentage. Alternative allometric models were also proposed/fitted using the 20mSRT (laps), height, and body mass.
The criterion validity values of both the linear and the allomeric models were found to be acceptable, with R2 = 82.5% and 82.7% respectively, providing reassuring evidence that the 20mSRT can be used with confidence to predict CRF. However, the allometric model identified a height-to-mass ratio, not dissimilar to the inverse body mass index (known to be a measure of leanness), to be associated with CRF. The allometric model also revealed that the rise in energy cost (V˙O2peak) with increasing laps was exponential. This will more accurately reflect the nonlinear rise in energy demand of shuttle running as the test progresses to exhaustion.
These observations provided powerful evidence that allometric models are more than satisfactory in terms of both criterion and construct validity when predicting CRF (V˙O2peak) using the 20mSRT.
最近，关于20米穿梭跑测试（20mSRT）预测青少年心肺适能（CRF）的有效性受到了质疑。尽管存在这些疑问，但作者们继续提供有力证据表明，尽管使用的模型不同，但可以使用20mSRT可靠地预测CRF。因此，我们旨在比较一种新的线性模型和另一种异速生长模型，以使用20mSRT预测CRF（最大摄氧量，V˙O2peak）。
该研究纳入了148名13.37±1.84岁的青少年（43%为女孩）。青少年被随机分配到验证组（n = 91）和交叉验证组（n = 57）。在实验室的最大运动测试和20mSRT中，均使用气体分析仪测量V˙O2peak。应用多元线性回归方法，使用20mSRT（圈数）、体重指数和体脂百分比建立线性模型。还使用20mSRT（圈数）、身高和体重提出/拟合了替代异速生长模型。
线性模型和异速生长模型的效标效度值均被认为是可接受的，R2分别为82.5%和82.7%，这提供了令人放心的证据，表明20mSRT可用于自信地预测CRF。然而，异速生长模型确定身高体重比与CRF相关，这与体重指数倒数（已知是瘦度的一种度量）并无不同。异速生长模型还表明，随着圈数增加，能量消耗（V˙O2peak）的增加是指数性的。这将更准确地反映随着测试进行到疲劳，穿梭跑能量需求的非线性增加。
这些观察结果提供了有力证据，表明在使用20mSRT预测CRF（V˙O2peak）时，异速生长模型在效标效度和结构效度方面都非常令人满意。
