Table 3 Fluid intake reported by ultrarunners before, during, and after each race stage, as well as total fluid intake, calculated as the average of values reported before and during the corresponding stage.

From: No hyponatremia despite continuous plasma sodium decline in female runners during a seven stage ultramarathon

Fluid intake, L

Sex

Race stage

1

2

3

4

5

6

7

Before

Male

1.5 (0.9)

1.7 (0.9)

1.5 (0.4)

1.5 (0.8)

1.5 (0.5)

1.5 (0.9)

1.5 (0.8)

Female

1.7 (0.5)

1.9 (1.7)

1.6 (0.2)

1.7 (0.5)

1.7 (0.5)

1.5 (0.6)

1.5 (0.9)

During

Male

2.0 (0.6)

1.5 (0.7)

2.0 (0.9)

2.0 (0.8)

2.0 (1.1)

2.0 (1.4)

2.4 (1.8)

Female

1.8 (0.7)

1.5 (1.0)

1.9 (1.5)

2.1 (0.8)

2.0 (0.5)

2.5 (0.3)

2.3 (0.4)

After

Male

2.0 (0.7)

2.0 (0.7)

2.0 (1.0)

2.0 (1.2)

2.0 (1.3)

1.5 (0.9)

2.0 (1.8)

Female

1.5 (0.4)

1.5 (0.5)

1.6 (1.0)

2.1 (1.5)

1.8 (1.2)

1.3 (0.7)

2.4 (1.4)

Total

Male

1.7 (0.8)

1.5 (0.9)

1.8 (0.6)

1.8 (0.8)

1.8 (0.7)

1.9 (0.8)

1.9 (0.7)

Female

1.7 (0.8)

2.1 (1.2)

2.0 (1.0)

1.9 (0.8)

1.9 (0.7)

2.0 (0.8)

2.0 (0.7)

  1. Values are expressed as median (interquartile range).
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