Parameter | Pre-race | Post- race | Absolute change | Change (%) |
---|---|---|---|---|
 | M ± SD | M ± SD |  | |
Male ultra-MTBers (n = 37) |  |  |  |  |
Body height (cm) | 180.4 ± 0.1 |  |  |  |
Age (yr) | 36.6 ± 8.4 |  |  |  |
Body mass (kg) | 77.9 ± 9.6 | 75.9 ± 9.8 | -2.0 ± 1.6** | -2.6 ± 2.1** |
Skeletal muscle mass (kg) | 38.4 ± 4.9 | 38.1 ± 4.9 | -0.3 ± 1.1 | -0.6 ± 2.7 |
Fat mass (kg) | 10.6 ± 5.3 | 9.2 ± 4.9 | -1.4 ± 1.2** | -14.9 ± 14.5** |
Percent body fat (%) | 13.2 ± 5.7 | 11.8 ± 5.4 | -1.4 ± 1.4** | -12.7 ± 14.6** |
Total body water (L) | 49.3 ± 5.5 | 48.9 ± 5.7 | -0.4 ± 1.4 | -0.9 ± 2.8 |
Extracellular fluid (L) | 18.3 ± 2.0 | 18.1 ± 2.1 | -0.2 ± 0.6* | -1.2 ± 3.2* |
Intracellular fluid (L) | 31.0 ± 3.5 | 30.8 ± 3.6 | -0.2 ± 0.8 | -0.7 ± 2.6 |
Volume of the foot (L) | 1.132 ± 1.502 | 1.145 ± 1.302 | 0.013 ± 0.097 | 1.8 ± 9.6 |
Female ultra-MTBers (n = 12) |  |  |  |  |
Body height (cm) | 167.8 ± 29.3 |  |  |  |
Age (yr) | 36.8 ± 8.9 |  |  |  |
Body mass (kg) | 60.6 ± 4.9 | 59.7 ± 4.9 | -0.9 ± 1.2* | -1.5 ± 1.9* |
Skeletal muscle mass (kg) | 26.7 ± 3.3 | 26.8 ± 3.2 | 0.1 ± 0.7 | 0.4 ± 2.7 |
Fat mass (kg) | 10.9 ± 3.9 | 9.7 ± 3.9 | -1.2 ± 1.0** | -8.2 ± 10.8** |
Percent body fat (%) | 15.4 ± 6.5 | 13.7 ± 6.2 | -2.7 ± 3.6* | -11.0 ± 15.5* |
Total body water (L) | 35.3 ± 4.4 | 35.4 ± 4.5 | 0.1 ± 0.9 | 0.2 ± 2.7 |
Extracellular fluid (L) | 13.3 ± 1.7 | 13.3 ± 1.7 | 0.0 ± 0.5 | 0.0 ± 3.6 |
Intracellular fluid (L) | 22.0 ± 2.7 | 22.1 ± 2.8 | 0.1 ± 0.5 | 0.4 ± 2.3 |
Volume of the foot (L) | 0.858 ± 1.205 | 0.908 ± 1.100 | 0.050 ± 0.116 | 6.9 ± 14.4 |