overhydration What is overhydration? Expert advice for long distance runners We speak to an expert in overhydration and hyponatremia to understand how overhydration happens to elite athletes, the dangers and how to avoid it on your next big run Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors MOST READ1Ortovox Mesola ski jacket review: what the shell? A superb hard/soft hybrid you’ll love2"Rather embarrassed" wild camper sparks two-hour rescue operation after forgetting where he pitched his tent3This Garmin watch can run indefinitely on a single charge, has its own flashlight, and is cheaper than ever at Amazon4Bear mauls British woman's arm after she tries to take selfie through car window5"How incredibly unsafe" – tourist leads tiny child right up to snoozing bull elk in Colorado