50, P = 0 001) (Figure  1) and the percent change in fat mass (r

50, P = 0.001) (Figure  1) and the percent change in fat mass (r = 0.44, P < 0.001) and significantly and negatively related to fluid intake (r = -0.54, P < 0.05) (Figure  1) and percent change in plasma urea (r = -0.53, P < 0.05). Men’s’ absolute ranking in the race was not related to changes in plasma [Na+], or percent

changes in urine specific gravity (P > 0.05). Changes in body mass were significantly and negatively related to the Smoothened inhibitor number of achieved kilometers during the 24 hours also in women (r = -0.80, P < 0.001). Their absolute ranking during the race was significantly and positively related to the change in body mass (r = 0.70, P < 0.05), the percent change in body mass (r = 0.77, P < 0.05) (Figure  1), and significantly and negatively related CX-5461 mouse to fluid intake (r = -0.73, P < 0.05) (Figure  1) during the race. Women’ absolute ranking in the race was not related to percent change in fat mass, or percent change in urine specific gravity (P > 0.05). Changes in body composition with regard to anthropometric, urine and blood measurements The correlation matrix of post-race body mass, change in body mass, percent change in body mass, post-race fat mass, percent LGX818 change in fat mass, percent change in extracellular fluid and percent change in plasma urea for men is shown

in Table  4. The correlation matrix of change in body mass, percent change in body mass and percent change in fat mass for women is presented in Table  5. Table 4 Correlation matrix of PR BM, ΔBM, %ΔBM, PR FM, %ΔFM, %ΔECF and %Δ plasma urea

for men (n = 37) PR BM 0.20 0.33* 0.63** 0.17 0.35* -0.10 ΔBM 0.99** 0.19 0.30 0.88** -0.44 %ΔBM 0.53* 0.33* 0.83** -0.50* PR FM 0.45** cAMP 0.29 -0.53* %ΔFM -0.05 -0.31 %ΔEXW -0.52* %ΔPU PR BM – post-race body mass, ΔBM – change in body mass, %ΔBM – percent change in body mass, PR FM – post-race body mass, %ΔFM – percent change in fat mass, %ΔECF – percent change in extracellular fluid, %Δ plasma urea – percent change in plasma urea. Output file contain both the Pearson’s r values and the scatter plot, one star (*) above the Pearson value represents significance level P < 0.05, two stars (**) P < 0.001. Table 5 The correlation matrix of ΔBM, %ΔBM and %ΔFM for women (n = 12) ΔBM 0.99** 0.35 %ΔBM 0.36 %ΔFM ΔBM – change in body mass, %ΔBM – percent change in body mass, %ΔFM – percent change in fat mass. Output file contain both the Spearman’s rank correlation coefficient and the scatter plot, one star (*) above the Spearman value represents significance level P < 0.05, two stars (**) P < 0.01. In male ultra-MTBers (n = 37) body mass decreased significantly during the race by 2.0 ± 1.6 kg, equal to 2.6 ± 2.1% (P < 0.001) (Table  2, also Figure  2). Fat mass decreased significantly by 1.4 ± 1.2 kg (P < 0.001), percent body fat decreased significantly by 1.4 ± 1.4% (P < 0.001), whereas skeletal muscle mass decreased non-significantly by 0.6 ± 2.7% (P > 0.05) (Table  2, also Figure  2).

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