| Water (mean % (SEM)) | Sports drink (mean % (SEM)) | |
| All subjects | +0.16% (0.24) | +0.38% (0.27) |
| Males | +0.04% (0.42) | +0.18% (0.33) |
| Females | +0.43% (0.23)* | +0.13% (0.34)* |
*Underestimated dehydration resulting from increased postswim extracorporeal water in female subject’s hair.