The runner’s high is real: a Journal of Experimental Biology study shows that running releases endocannabinoids, which are associated with pleasure and could keep you coming back for more. But don’t worry if the idea of a runner’s high feels more distant than a marathon finish-line. You just need to move past the point in which running totally sucks.
You know that protein can keep you full longer and burn more calories during digestion. Choose your protein carefully. Dark meat tends to be high in fat, which could cancel out some of the benefits. Skinless chicken breast is a great choice. And some cuts of beef can make the grade. Flank steak, eye of round, and top sirloin are extra-lean with less than 4 grams of saturated fat per serving. Stick with a 3- to 4-ounce portion.
Of course, it's not always easy to find—or afford—organic produce. But in general, conventionally grown items that you peel—avocado, grapefruit, bananas—are fine. But choose organic when buying celery, peaches, strawberries, apples, blueberries, nectarines, sweet bell peppers, spinach, kale and collard greens, cherries, potatoes, and imported grapes; they tend to have the highest levels of pesticides.