Paul Rider runs on Mulholland Drive in Los Angeles, March 25, 2011. Researchers say a moderate running regimen is actually beneficial for the joints of people with healthy knees. Dennis J. Provost for NPR hide caption

itoggle caption Dennis J. Provost for NPR

Doctors are treating sleep apnea with a type of robotic surgery typically used to remove cancerous tumors at the back of the throat. Courtesy of MayoClinic.org hide caption

itoggle caption Courtesy of MayoClinic.org

On this week's podcast we hear about needle biopsies, a less costly and less invasive alternative to surgical biopsies for breast cancer. National Cancer Institute hide caption

itoggle caption National Cancer Institute

Sandy Palais, 73, of Arizona started lifting weights about 10 years ago after she was diagnosed with osteoporosis. Jason Millstein for NPR hide caption

itoggle caption Jason Millstein for NPR

An airline passenger wears a mask to protect against viruses. Passengers are at risk of becoming infected in the airplane's cabin, just as they would be in any crowded, confined space. Eitan Abramovich/AFP via Getty Images hide caption

itoggle caption Eitan Abramovich/AFP via Getty Images

Evidence shows babies fed with formula gain weight more rapidly than breastfed babies. Dr Craig/via Flickr hide caption

itoggle caption Dr Craig/via Flickr

Severe mental illness among college students has increased dramatically over the last ten years.  The most common problem is anxiety and depression. Allison Rose/iStockphoto.com hide caption

itoggle caption Allison Rose/iStockphoto.com

Jay Ducote with his award-winning Blackberry, Bourbon, Butt dish, a pork shoulder injected with honey and bourbon, and smoked for 12 hours.  Ducote appreciates good food and drink, but says he sometimes overdoes it. Nicole Colvin hide caption

itoggle caption Nicole Colvin

Yolanda Hilario and her younger teenage son, Noel, sit in their living room in South Central Los Angeles on Dec. 15. Hilario is trying to balance guidelines and independence for her two teenage boys. Dennis J. Provost for NPR hide caption

itoggle caption Dennis J. Provost for NPR

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