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. 2023 May 10;12:e86291. doi: 10.7554/eLife.86291

Table 1. Basic anthropometric characteristics for runners.

Variable (unit) Derivation group n=1998 Testing group n=666 Validation group n=666
Mean CI SD Mean CI SD Mean CI SD
Age (years) 36.2 35.6–36.9 8.45 35.9 35.5–36.3 8.05 35.5 34.9–36.2 8.14
Height (cm) 180.0 179.6–180.5 6.04 179.4 179.1–179.7 6.13 179.7 179.2–180.2 6.61
BM (kg) 77.7 77.0–78.4 9.35 77.7 77.3–78.1 9.29 77.9 77.1–78.6 10.1
BMI (kg·m–2) 23.9 23.8–24.1 2.43 24.1 24.0–24.2 2.41 24.1 23.9–24.3 2.56
BF (%) 15.4 15.1–15.7 4.55 15.5 15.3–15.7 4.52 15.4 15.1–15.8 4.55
FM (kg) 12.2 11.9–12.6 4.68 12.3 12.1–12.5 4.65 12.3 11.9–12.7 4.92
FFM (kg) 65.5 65.0–66.0 6.43 65.4 65.1–65.7 6.31 65.6 65.1–66.1 6.86

BM, body mass; BMI, body mass index; BF, body fat; FM, fat mass; FFM, fat-free mass; CI, 95% confidence interval; SD, standard deviation.