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Table 1 Shows baseline characteristics for all participants (A) and subgroups of professional athletes and amateur athletes. All data presented as mean ± standard deviation. BMI body mass index

From: Estimation of anaerobic threshold by cardiac repolarization instability: a prospective validation study

  (A) all participants (n = 65) (B) professional athletes (n = 32) (C) amateur athletes (n = 33)
female (n) 14 0 14
male (n) 51 32 19
age (yr) 22.3 ± 5.2 23.1 ± 5.5 21.6 ± 4.9
weight (kg) 73.9 ± 10.5 78.5 ± 8.4 69.4 ± 10.5
height (cm) 180.2 ± 9.6 185.4 ± 7.5 175.1 ± 8.6
BMI (kg×m− 2) 22.7 ± 1.8 22.8 ± 1.3 22.5 ± 2.1