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Distribution of changes in % ΔBM across races (% in parentheses)
| Category | Number of runners | Dehydration % ΔBM < −3 | Euhydration % ΔBM −3 to 0 | Overhydration % ΔBM > 0 |
|---|---|---|---|---|
| 10-km | 184 | 0 (0) | 175 (95) | 9 (5) |
| 21-km | 181 | 20 (11) | 155 (86) | 6 (3) |
| 25-km | 591 | 133 (23) | 427 (72) | 31 (5) |
| 42-km | 522 | 111 (21) | 382 (73) | 29 (6) |
| 50-km | 281 | 95 (34) | 164 (58) | 22 (8) |
| 84-km | 110 | 33 (30) | 69 (63) | 8 (7) |
| 100-km | 18 | 12 (67) | 5 (28) | 1 (5) |
