A group of teenagers take a morning jog at the Wellspring Academy in Reedley, Calif., in 2009. The school specializes in helping teens and college students lose weight. A new study shows teens who remain obese risk a lifetime of chronic health problems and poverty. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

This tiny telescope gets implanted in one eye and magnifies the image to make up for "holes" in the person's vision. It can greatly improve sight for some people with age-related macular degeneration. Courtesy VisionCare Ophthalmic Technologies hide caption

itoggle caption Courtesy VisionCare Ophthalmic Technologies

Actor Jonathan Haze bicycles at the Cardiac Rehab Lab at Cedars-Sinai Heart Institute. Exercise physiologist Asako Oshiro takes his blood pressure while he’s pumping. Patti Neighmond/NPR hide caption

itoggle caption Patti Neighmond/NPR

A recent study found melanoma risk increased as much as three times among people who tanned more than 50 hours in their lifetime, or had more than 100 sessions in a tanning booth. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Texting behind the wheel almost killed 16-year-old driver Tyler Young. Courtesy of The News On 6 hide caption

itoggle caption Courtesy of The News On 6

Many people with a hoarding anxiety disorder need to take baby steps in order to cope with organization β€” like cleaning a bit at a time, rather than getting rid of everything at once. Grap/Wikimedia Commons hide caption

itoggle caption Grap/Wikimedia Commons

For athletes and nonathletes alike, stretching to keep muscles limber may help prevent cramping later in life. Ian Stewart/AP hide caption

itoggle caption Ian Stewart/AP