Overdrinking risk
Hyponatremia
Prevention
The danger is not only under-drinking. Over-drinking plain water can also wreck race day.
Long eventsHot daysPlain water trapEscalate fast
Match losses
Goal
Plain-water overload
Avoid
Sodium
Pair with
Confusion = medical
Emergency
Hyponatremia risk map
Hyponatremia prevention works best when athletes drink to plan, match intake to losses, and include sodium during longer or hotter events instead of nonstop plain water.
Safety checklist
Pre-meet brief
no athlete needs nonstop plain water all day
Long or hot event
fluid plan includes sodium, not only water
Use sweat rate and session length to guide intake
Stop using fear-based drinking targets
Confusion, swelling, vomiting, or worsening headache means medical evaluation now
Emergency signs
Small-framed athletes can be especially vulnerable to overdoing plain water.Hyponatremia can look like heat illness and still needs fast medical attention.Overdrinking is a preventable problem when the plan is specific enough to follow.
Pre-brief the team that the goal is to replace losses with sodium support when needed, not to win a water-drinking contest.