The study titled ‘Estimating VO(2)max With the Timed Mile Run: An Updated Equation for Today’s Youth’ published in The Journal of School Health explores the validity of the widely used Fitnessgram equation for estimating cardiorespiratory fitness (VO2max) in today’s diverse adolescent population.
School-based physical fitness testing (SB-PFT) is crucial for addressing physical inactivity among youth. However, the Fitnessgram equation, which converts timed mile run performance into VO2max estimates, may not accurately reflect the fitness levels of contemporary adolescents. This study aimed to evaluate the Fitnessgram’s validity, develop updated prediction equations, and assess the impact of omitting sex and/or BMI in these equations.
Methods
The research involved a diverse sample of middle school students (n = 177) who provided demographic information and timed mile run data. Participants also underwent lab-based VO2max testing to establish a reliable benchmark for comparison. The study assessed the prediction accuracy of both the Fitnessgram equation and the newly developed equations using metrics such as root mean square error (RMSE), Pearson’s correlation, and sensitivity and specificity.
Results
The findings indicated that all four newly developed VO2max prediction equations significantly outperformed the Fitnessgram equation. This included equations that excluded sex and/or BMI, suggesting that these factors may not be as critical in estimating VO2max as previously thought.
Implications
The implications of this study are significant for school health policy and practice. The results suggest that the Fitnessgram equation misclassifies many adolescents as being in the healthy fitness zone, despite their actual cardiorespiratory fitness levels being associated with elevated health risks. Therefore, it is recommended that the Fitnessgram VO2max prediction equation be updated to align with the contemporary demographics of U.S. adolescents and to address schools’ concerns regarding the collection of BMI data.
What this study does not show
This study does not provide evidence of improved health outcomes resulting from the use of the new VO2max equations, nor does it evaluate the long-term impact of using these equations in school health programs.
Evidence scorecard
- Analytic validity: Established
- Clinical validity: Partial
- Clinical utility: Not established
The evidence is based on primary research involving human participants.