Fig. 4. a) Ratings for the question, "How sore does your head feel now?" in the fluid restriction and euhydration conditions. (**p < 0.01 compared to the euhydration condition). Data re-plotted from Shirreffs et al. [11]. b) Ratings for the question, "How well can you concentrate just now?" in the fluid restriction and euhydration conditions (**p < 0.01 compared to the euhydration condition). Data re-plotted from Shirreffs et al. [11]. c) Changes in body mass over time for fluid restriction and euhydration conditions (*p < 0.05 compared to euhydration). Data re-plotted from Shirreffs et al. [11].