Why athletes need salt when they sweat a lot
The importance of salt in the athlete’s diet
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When athletes sweat a lot, they lose salt, especially sodium. Drinking only water without replacing salt can make them feel sick, get cramps, or have heat problems. Some people lose more salt than others, so they need to eat more salty foods or add salt to their drinks.
Surprising Findings
Drinking only water after heavy sweating can increase the risk of hyponatremia and heat illness.
Contradicts the long-standing belief that water is the safest and most neutral choice for rehydration.
Practical Takeaways
Weigh yourself before and after exercise to estimate fluid loss and guide rehydration.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When athletes sweat a lot, they lose salt, especially sodium. Drinking only water without replacing salt can make them feel sick, get cramps, or have heat problems. Some people lose more salt than others, so they need to eat more salty foods or add salt to their drinks.
Surprising Findings
Drinking only water after heavy sweating can increase the risk of hyponatremia and heat illness.
Contradicts the long-standing belief that water is the safest and most neutral choice for rehydration.
Practical Takeaways
Weigh yourself before and after exercise to estimate fluid loss and guide rehydration.
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Claims (4)
When athletes sweat a lot during tough workouts in the heat, they can lose a surprising amount of salt—up to more than a teaspoon of salt every hour.
If athletes only drink light fluids like water during long workouts, they might not rehydrate fully and could get dangerously low on salt or suffer heat cramps.
Some athletes sweat out a lot of salt, and because everyone's different, a few need to eat more salt to stay healthy and avoid serious problems like low sodium or heat illness.
Weighing yourself before and after exercise can help athletes figure out how much fluid and salt they need to replace, so they stay properly hydrated without drinking too much or too little.