The Hidden Danger of Drinking Too Much Water During Exercise: How Over-Hydration Can Flush Out Critical Sodium
The well-intentioned advice to “drink as much as possible” during exercise can backfire spectacularly in hot weather. Excessive plain water consumption dilutes blood sodium to dangerous levels, a condition called exercise-associated hyponatraemia that affects not just ultramarathoners but casual gym-goers too. Here’s what your body actually needs.