Per cent change (pre-race to post-race) in body weight, blood volume, plasma volume, and red cell volume during the race for the cramp and control groups
| Variable | Cramp group (n = 21) | Control group (n = 22) |
|---|---|---|
| Values are mean (SD). | ||
| Change in body weight (%) | −2.9 (1.2) | −3.6 (1.2) |
| Change in blood volume (%) | −1.3 (5.5) | −3.7 (4.0) |
| Change in plasma volume (%) | 0.2 (6.3) | −0.7 (8.6) |
| Change in red cell volume (%) | −2.1 (16.2) | −8.3 (12.6) |