Table 1. Demographic characteristics of the participants (n = 10), sweat volume, and water intake during walking in the follicular and luteal phases. Data are means ± standard deviation. Follicular phase Luteal phase p value Age (years) 21 ± 1 (20-25) Height (m) 1.615 ± 0.08 (1.51 – 1.72) BMI (kg/m2) 20.5 ± 2.1 20.5 ± 2.2 0.476 Sweat volume (g) 234 ± 52 241 ± 45 0.563 Water intake (g) 388 ± 120 356 ± 96 0.362 The BMI of the participants ranged in the follicular and the luteal phases from 18.7 kg/m2 to 25.8 kg/m2, and from 18.7 kg/m2 to 26.1 kg/m2, respectively. BMI, body mass index.