3 Workout sins;that are aging your skin

Shape, July, 2008

SIN YOU WEAR A BASEBALL CAP TO PROTECT YOUR EYES The shade of a hat's brim won't fully shield your eyes. Over time, exposure to the sun's UV rays speeds up the development of cataracts (it can damage the skin on your eyelids too). Wear sunglasses that block 100 percent of UV rays, like the Adidas Adistar ($150; adidas.com), under your hat.

SIN YOU DON'T WANT TO TOTE A WATER BOTTLE Dehydration decreases your body's ability to sweat, which increases your risk of overheating. To prevent it, drink a glass of water before you head out, then fill up the easy-to-carry Asies grip bottle ($15; asics.com for stores), and bring it with you.

SIN YOU SLATHER ON SUNSCREEN-BUT SKIP YOUR LIPS "They have less pigment than the rest of your face and are more susceptible to UV damage," says Amy Derick, M.D., a dermatologist in Barrington, Illinois. Apply balm with SPF every two hours.

If you're guilty of these offenses, it's time to repent before your body pays the price.