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An estimate only. Kidney, heart and liver conditions, and some medicines, can change how much you should drink, so ask your prescriber.
How it works
The starting point is the U.S. National Academies' adequate intake from drinks: about 3.0 litres a day for men and 2.2 litres for women. Exercise adds 0.5 to 1 litre an hour, a cautious part of the 0.5 to 2 litres an hour of sweat loss the American College of Sports Medicine describes. Heat and altitude can raise it further.
In the app
Reko logs water beside your doses, food and side effects, so you can look at them together.
Sources
- Institute of Medicine, Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate (2005).
- American College of Sports Medicine, Exercise and Fluid Replacement (2007).