SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/hike-hydration-heat

Hiking in the heat at a moderate pace, how often should you drink water?

Every 15 to 20 minutes, about one cup each time.

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  1. Only when you feel faint
  2. About every 15 to 20 minutes ✔
  3. Only at lunch

Why: Small, steady drinks replace the water you lose in sweat. CDC suggests about 1 cup every 15 to 20 minutes for moderate activity in the heat.

Huh, didn't know that: If you sweat for several hours, CDC suggests sports drinks with balanced electrolytes.

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Why did the hiker drink every 15 minutes? He wanted to stay fluid in his plans.
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References

Answer: About every 15 to 20 minutes. Small, steady drinks replace the water you lose in sweat. CDC suggests about 1 cup every 15 to 20 minutes for moderate activity in the heat.

  1. CDC NIOSH: Keeping Workers Hydrated and Cool Despite the Heat www.cdc.gov/niosh/bulletin/2011/heat2.html
    each worker should drink 1 cup of water every 15 to 20 minutes.
    Checked 2026-10-12.
  2. CDC NIOSH: Heat Stress Recommendations www.cdc.gov/niosh/heat-stress/recommendations/index.html
    If sweating lasts for several hours, drink sports drinks containing balanced electrolytes.
    Checked 2026-10-12.

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