Limits of Hydration

• Water is not released from the stomach when we are under stress.
  • motion sickness
  • illness or pain
  • vigorous physical exertion
  • emotional stress: grief, fear or anger
• In the acclimatized person,
  • thirst is delayed to 2 - 3% dehydration
  • stomach emptying is delayed
• People overestimate the amounts drunk
  • Ten-fold overestimates in runners...
• Extra hydration is basically sweat replacement...

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