From: An increased fluid intake leads to feet swelling in 100-km ultra-marathoners - an observational field study
Subject
Pre-race plasma [Na+]
(mmol/L)
Post-race plasma [Na+]
Change in plasma [Na+]
Fluid intake
(L)
Change in
foot volume
(%)
1
139
132
- 7
3.0
- 30
2
20.0
+ 12.5
3
134
- 5
4.8
- 20
4
14.8
+ 8.3