Go to any prerace party or postrun potluck and you’ll see legions of runners twirling forks in huge plates of spaghetti. And why not? Carbs are king, right? Except protein for runners is just as ...

Water supports major body functions like temperature control, saliva production, joint cushioning, digestion, and waste removal through sweat, urine, and bowel movements. Most people meet hydration ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...