Shuttle run1/3/2024 ![]() ![]() 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. This will more accurately reflect the non-linear rise in energy demand of shuttle running as the test progresses to exhaustion. The allometric model also revealed that the rise in energy cost (V˙O2peak) with increasing laps was exponential. shuttle run means a transportation route within the city limits, established by the Employer, which consists of the regular delivery of children between school. However, the allometric model identified a height-to-mass ratio, not dissimilar to the inverse BMI (known to be a measure of leanness), to be associated with CRF. The criterion validity of both the linear and the allomeric models were found to be acceptable R2=82.5% and 82.7% respectively, providing reassuring evidence that the 20mSRT can be used with confidence to predict CRF. Alternative allometric models were also proposed/fitted using 20mSRT (laps), height and body mass. Multiple linear regression methods were applied to develop the linear models using 20mSRT (laps), BMI and body fat percentage. V˙O2peak was measured using a gas analyser in both maximal exercise tests in the laboratory as well as 20mSRT. Adolescents were randomly assigned to validation (n = 91) and cross-validation (n = 57) groups. The 20-m shuttle run test and another maximal multistage field test involving continuous track running gave comparable results (r 0.92, SEE 2.6 ml 02 9 kg. The study included 148 adolescents (43% girls), aged 13.37 ± 1.84 years. Therefore, we aimed to compare a new linear model with an alternative allometric model to predict CRF (peak oxygen uptake, V˙O2peak) using 20mSRT. Depending on the distance, duration and intensity, the shuttle run test will measure different physiological attributes, from short duration high-intensity tests measuring speed and agility, to longer and slower paced tests. ![]() Despite these doubts, authors continue to provide powerful evidence that CRF can be predicted reliably using the 20mSRT albeit using contrasting models. Shuttle run tests involve repetitive running back and forth, either over the same distance, or with changing distances. Recently, doubts have been raised concerning the validity of the 20-m shuttle run test (20mSRT) to predict cardiorespiratory fitness (CRF) in youth. The 30 foot (9.15m) Agility Shuttle Run is a test of agility, in which the participant runs back and forth between two parallel lines as fast as possible.
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