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Nutrition

Sweat Rate Retest Interval

The sweat rate retest interval schedules new weigh-in tests each season, after acclimation, or when weight loss at the same effort drifts.

The sweat rate retest interval is how often athletes repeat weigh-in sweat tests—typically each season shift (cool spring to summer heat), after heat acclimation, or when moving to humid race locations. Fitness and body size changes alter liters per hour.

One college-era test does not govern decade-long marathon plans.

Common questions

  • Is one sweat test enough for life?

    No—retest when climate, fitness, body mass, or race location changes materially. Use the same protocol each time for comparable numbers.

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