Foundational Rehab
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Education2026-03-09•5 min read

Hydration and Exercise: How Much Water Do You Really Need?

Why Hydration Matters for Exercise

Even mild dehydration affects:

  • Performance
  • Strength
  • Endurance
  • Coordination
  • Recovery

    • How Much Water?

    General Daily Intake

  • 8 cups (64 oz) is a starting point
  • More if active, hot climate, large body
  • Urine color: pale yellow = good

    • Before Exercise

  • 16-20 oz in the 2-3 hours before
  • Another 8 oz 20-30 minutes before

    • During Exercise

  • 7-10 oz every 10-20 minutes
  • More in heat or high intensity

    • After Exercise

  • 16-24 oz for every pound lost during exercise
  • Include electrolytes if over 60 minutes

    • Signs of Dehydration

  • Thirst (already somewhat dehydrated)
  • Dark urine
  • Fatigue
  • Headache
  • Decreased performance
  • Muscle cramps

    • Do You Need Sports Drinks?

    For most people: Water is fine

    Consider sports drinks if:

  • Exercise over 60 minutes
  • Heavy sweating
  • Hot conditions
  • Intense training

    • The Bottom Line

    Hydration for exercise:

    1. Stay hydrated daily — Don't play catch-up

    2. Drink before, during, after — All matter

    3. Monitor urine color — Pale yellow is good

    4. Water usually suffices — Sports drinks for long/intense

    Foundational Rehab includes hydration guidance.

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