Descriptive characteristics among the endurance runner and non-runner athletes
| Non-runner athletes (n=18) | Endurance runners (n=51) | p Value | Total | |
|---|---|---|---|---|
| Age (y) | 16.0±0.3 | 16.3±0.2 | 0.37 | 16.2±0.2 |
| Height (cm) | 177.3±2.2 | 173.6±1.1 | 0.09 | 174.6±1.0 |
| Weight (kg) | 69.6±3.2 | 60.6±1.3 | 0.02 | 63.0±1.3 |
| % Expected weight* | 92.6±2.7 | 85.5±1.1 | 0.02 | 87.3±1.1 |
| BMI (kg/m2) | 22.0±0.7 | 20.0±0.3 | 0.02 | 20.5±0.3 |
| BMI Z-score | 0.46±0.17 | −0.39±0.10 | <0.001 | −0.17±0.10 |
| Body fat (%) | 14.3±0.8 | 14.2±0.6 | 0.91 | 14.2±0.5 |
| Fat mass (kg) | 10.3±0.9 | 8.7±0.5 | 0.10 | 9.1±0.4 |
| FFM (kg) | 58.3±4.1 | 52.1±1.0 | 0.17 | 53.7±1.3 |
| Average mileage† | – | 14.4±2.0 | – | – |
Between-group comparisons evaluated using independent samples t-test (mean±SEM).
*Using the Hamwi equation.
†Average weekly running mileage over the past year (only evaluated among endurance runners).
BMI, body mass index; FFM, fat-free mass.