Sure, exercise leaves you with that endorphin glow, but you may also notice some not-so-pretty side effects, like flare-ups on your chest, back, or rear. “Those areas are filled with hair follicles,” explains Dr. Jegasothy, “making them extra susceptible to breakouts.” So if showering after your ab routine isn’t enough, regularly use an acne-busting body wash, like Neutrogena Body Clear Body Wash ($12,amazon.com), to reduce the number of bacteria on your skin. (The germs can ultimately lead to rashes and blemishes.) As for already-existing spots, run a body wipe with at least 2 percent salicylic acid over them once a day. A good choice:Stridex Maximum Strength Acne Pads. Buh-bye, bacne!