You may think of potassium as a mineral that helps maintain electrolyte balance, not one that promotes muscle growth. But you need enough potassium in your diet to help build both protein and muscle. Adults need 4,700 milligrams of potassium a day. Any fruit can help you meet your daily potassium needs, but be sure to include those that are especially good sources, such as cantaloupe, bananas, oranges, kiwifruit, prunes and dried apricots.

Carbs provide your body with energy, and if you don't get enough, your body might burn your muscle for energy instead. The Academy of Nutrition and Dietetics says that if you're strength training a minimum of twice a week, at least half your calories should come from carbs. Carbs are the major macronutrient in fruit and make a healthy choice on your muscle-growing diet. Healthy, high-carb fruits include grapes, pears, cherries, pineapple and dates.

Strenuous exercise causes chemical reactions that may damage cells, and this may lead you to consider adding antioxidant supplements to your daily routine. But when it comes to antioxidants and health, it's always better to get them from food. Fruits are rich in a number of antioxidants, including vitamin C, carotenoids and flavonoids. Load up on antioxidants to protect your muscles by filling your diet with mangoes, grapefruit, apples and berries.

There are a number of ways you can add fruit to your muscle-building diet to get all the nutritional benefits. Start by making fruit the sweet ending to your meals. Fruit also makes a good carb choice for your post-workout snack. Blend it up with Greek yogurt or protein powder to get the nutrients your body needs for building and replenishing. Fruit also makes an easy and convenient snack choice.