Figure 2.

Serum sodium (SNa) responses of UER along MSUM competition. (A) SNa concentration, (B) Individual SNa responses. Mean (SD): UER (■, n = 19), slow runners (SR; MSUM mean speed <8 km/h, n = 11), and fast runners (FR; MSUM mean speed ≥8 km/h, n = 8). a Normal physiological range 135 to 145 mmol/L [32]; hyponatraemia <135 mmol/L [24]. Closed bars represent a pre- to post-stage increase in SNa concentration. Open bars present a pre- to post-stage decrease in SNa concentration. †† p < 0.01 and † p < 0.05 vs. pre-Stage 1; **p < 0.01 and *p < 0.05 vs. pre-stage.

Costa et al. Nutrition Journal 2013 12:13   doi:10.1186/1475-2891-12-13
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