a nonsignificant trendp = 0.058
Serum sodium concentration increased significantly from the beginning to the end of exercise in both MOD and HI sessions (time effect: p = 0.003) and decreased during recovery (time effect: p < 0.0001), with a nonsignificant trend towards higher serum sodium in MOD versus HI during both exercise (treatment effect: p = 0.058, interaction: p = 0.62) and recovery (treatment effect: p = 0.08, interaction: p = 0.56) ( Figure 1 C).