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Table 2 Body composition parameters of the runners and control subjects before (Pre) and after (Post) the mountain ultra-marathon

From: The increase in hydric volume is associated to contractile impairment in the calf after the world’s most extreme mountain ultra-marathon

  Runners (n = 11) Control (n = 8)
Pre Post Pre Post
Total body hydration-Hyd (% BW) 60 ± 1 66 ± 1*** (+10 %) 62 ± 1 61 ± 1†† (−2 %)
Total hydration of the non-fat mass-NF-Hyd (% BW) 72 ± 1 80 ± 1*** (+11 %) 74 ± 2 73 ± 2†† (−1 %)
Total body water (% BW) 46 ± 1 51 ± 1*** (+11 %) 49 ± 3 48 ± 3 (−2 %)
Extracellular mass (% BW) 35 ± 1 38 ± 1* (+9 %) 34 ± 1 33 ± 1 (−3 %)
Extracellular water volume-Ve (L) 21 ± 1 24 ± 1*** (+14 %) 22 ± 1 22 ± 1 (0 %)
Intracellular water volume-Vi (L) 24 ± 1 23 ± 1* (−4 %) 26 ± 1 26 ± 2 (0 %)
Ve/Vi 88 ± 2 106 ± 6* (+20 %) 86 ± 2 83 ± 1†† (−3 %)
  1. Values are expressed as the mean ± SEM
  2. Values in bracket correspond to percentage change (Post-race minus Pre-race)
  3. % BW expressed in % of body weight
  4. p < 0.05, ** p < 0.01, *** p < 0.001 for differences between Post- and Pre-values
  5. p < 0.05, †† p < 0.01 for differences between runners and control participants