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Table 1 Age, anthropometric characteristics, running performance, running experience and training status of the marathoners. Data is mean ± SD for each group

From: Interindividual variability in sweat electrolyte concentration in marathoners

Variable (units) Men Women P value
N 141 16 -
Age (y) 41.9 ± 9.7 42.0 ± 6.1 0.98
Body mass (kg) 75.0 ± 9.2 56.6 ± 7.1 <0.01
Body surface area (m2) 1.9 ± 0.1 1.6 ± 0.1 <0.01
Height (m) 176 ± 7 161 ± 5 <0.01
Body mass index (kg · m−2) 24.1 ± 2.2 20.9 ± 1.2 <0.01
Best race time (min) 217 ± 34 240 ± 32 0.03
Running experience (yr) 10.7 ± 9.8 9.5 ± 5.9 0.67
Completed marathons (number) 7 ± 3 5 ± 2 0.42
Average training distance · week−1 (km) 62.7 ± 27.8 59.5 ± 26.6 0.69
Training sessions of running · week−1 (number) 4.3 ± 1.0 4.4 ± 1.0 0.68
  1. P values correspond to U Mann–Whitney tests used to compare differences between sexes