That hydration mantra doesn't hold water now
Conventional wisdom has been endurance athletes can never drink enough water during intense exercise. Turns out that's not true. With deaths from a condition known as hyponatremia on the rise, medical experts have finally drawn a link showing it is not only possible to dilute your body of vital nutrients but it's probable under the right conditions. Interestingly, this wasn't a problem until the marathon's popularity soared and slower runners joined the ranks. The longer you're out there, the more you tend to drink....