In July of 2025, President Donald Trump reinstated the Presidential Physical Fitness Test,[1] a standardized evaluation of fitness for American school-age children. It includes a one-mile run, ...

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I was on my fourth and final lap around the track during the mile run for my fifth-grade Presidential Fitness Test when it happened. My stomach gurgled, I stopped abruptly, and I bent over and heaved.

The key message of this Commentary is to highlight the potential value of school-based physical fitness testing (SB-PFT) as a useful and predictive biomarker of pediatric health. To achieve its ...