Get the 411 on what to eat and drink before, during, and after exercise. By Karen Ansel, MS, RD
If you bike or run an hour or more, you’re not just losing fluids. You’re also sweating out electrolytes like sodium and potassium. You could replace them with a sports drink or you could chase down some water with a glass of tomato juice. It’s filled with potassium and sodium. One eight-ounce glass delivers six-and-a-half times the sodium and 15 times the potassium you’d get from your standard sports drink.