Abstract
Background and objective: The disadvantage of the traditional 20-m multistage shuttle run test (MST) is that it requires a long space for measurements and does not include various age groups to develop the test. Therefore, we developed a new MST to improve the spatial limitation by reducing the measurement to a 10-m distance and to resolve the bias via uniform distributions of gender and age. Material and methods: Study subjects included 120 healthy adults (60 males and 60 females) aged 20 to 50 years. All subjects performed a graded maximal exercise test (GXT) and a 10-m MST at five-day intervals. We developed a regression model using 70% of the subject's data and performed a cross-validation test using 30% of the data. Results: The male regression model's coefficient of determination (R2) was 58.8%, and the standard error of estimation (SEE) was 4.17 mL/kg/min. The female regression model's R2 was 69.2%, and the SEE was 3.39 mL/kg/min. The 10-m MST showed a high correlation with GXT on the VO2max (males: 0.816; females: 0.821). In the cross-validation test for the developed regression models, the male's SEE was 4.38 mL/kg/min, and the female's SEE was 4.56 mL/kg/min. Conclusion: Thus, the 10-m MST is an accurate and valid method for estimating the VO2max. Therefore, the 10-m MST developed by us can be used when the existing 20-m MST cannot be used due to spatial limitations and can be applied to both men and women in their 20s and 50s.
Highlights
Cardiopulmonary endurance is the most important physical factor for human health, daily life, occupational activity, leisure, and sports [1]
HRmax showed a high correlation of 0.9 or more between graded maximal exercise test (GXT) using the treadmill and 10-m multistage shuttle run test (MST). These results show that even 10-m MST, which has a relatively short measurement time, does not have any problem measuring the maximum exercise capacity
When making the test protocol using the treadmill, we set the exercise load increase between stages to be small and calculated the shuttle speed of the 10-m MST based on this treadmill speed
Summary
Cardiopulmonary endurance is the most important physical factor for human health, daily life, occupational activity, leisure, and sports [1]. The most common method of VO2max measurement involves testing for incremental maximal exercise in a controlled laboratory setting [1, 11]. Incremental maximal exercise testing requires expensive tools and a skilled workforce. This method requires considerable time for the preparation and actual measurement, and it is limited to one subject at a time. All subjects performed a graded maximal exercise test (GXT) and a 10-m MST at five-day intervals. We developed a regression model using 70% of the subject's data and performed a crossvalidation test using 30% of the data. In the cross-validation test for the developed regression models, the male's SEE was 4.38 mL/kg/min, and the female's SEE was 4.56 mL/kg/min. The 10-m MST developed by us can be used when the existing 20-m MST cannot be used due to spatial limitations and can be applied to both men and women in their 20s and 50s
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