Nutrition
Sweat Rate Calculation Method
The sweat rate calculation method uses pre- and post-session weigh-ins plus fluids consumed to estimate liters lost per hour in matched conditions.
The sweat rate calculation method estimates fluid loss per hour by weighing nude or minimal clothing before and after exercise, adding back any fluids and urine lost during the session. Divide net body mass change in kilograms by duration in hours for liters per hour in similar heat and intensity.
One test in cool weather underestimates summer race needs.
Common questions
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Do you subtract fluids drunk during the test?
Yes—add back every liter consumed and estimate urine loss or use a controlled session without bathroom breaks for cleaner math.
Related terms
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