Apples are a great slow-digesting carb that contain numerous beneficial antioxidants. One group of compounds known as apple polyphenols has been found to boost muscle strength, endurance and even fat loss, especially from around the abs.  While apple polyphenols appear to directly decrease bodyfat by increasing the activity of genes that enhance fat-burning and decrease fat production and storage, the boost in endurance and strength can help further fat loss by allowing you to train harder longer.

A typical large apple provides about 200 mg of apple polyphenols and about 30 grams of carbs.