As you walk, body weight passes through the base of the big toe. So that's where your shoe should bend. Courtesy of Emily Cook hide caption

itoggle caption Courtesy of Emily Cook

Over a third of U.S. adults are now getting their shots in places other than a doctor's office, like at this CVS store in Rockville, Md. Evan Vucci/AP hide caption

itoggle caption Evan Vucci/AP

Making up sleep during the day didn't reduce the risk that kids in the study would gain weight. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

For women who carry certain genes, getting a double mastectomy before anything shows up on a mammogram may reduce breast and ovarian cancer risk. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

"I still have, on some days, a wonderful relationship with my daughter," Taryn Cregon says of Zoe, 13. "But it goes from this really back-and-forth, loving relationship to almost seeming like that person looks at you like you're enemy No. 1." Courtesy of Taryn Cregon hide caption

itoggle caption Courtesy of Taryn Cregon

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