Table 1 Examples of hydration status calculations

From: Markers of hydration status

Exercise Pre-exercise Body mass a (kg) Post-exercise Body mass b (kg) Total body massloss or gain a (ml or g) Drinks consumed during exercise b (ml) Urine excreted during exercise c (ml) Sweat volume (ml) Hydration statusd (%)
60 min Running 70.00 68.00 −2000 0 200 1800 −2.9
3 h Walking 70.00 70.00 0 500 400 100 0.0
2 h Cycling 70.00 70.20 +200 1000 0 800 +0.3
  1. aBody mass measured nude with dry skin.
  2. bDrinks consumed any time between the two body mass measurements.
  3. cUrine emptied from the bladder any time between the two body mass measurements.
  4. d+=water gain, −=water loss, 0=no change in water balance.