Olympic gold medalist Sanya Richards-Ross pulls on compression sleeves before a 400-meter race at the World Indoor Athletics Championships in Istanbul in 2012. Martin Meissner/AP hide caption

itoggle caption Martin Meissner/AP

Photos from Liz Paul's blog entries on Prior Fat Girl. The blog chronicles women's weight loss journeys. Courtesy of Liz Paul/PriorFatGirl.com hide caption

itoggle caption Courtesy of Liz Paul/PriorFatGirl.com
Keith Negley for NPR
Bianca Giaever for NPR

Kendall Schrantz, center, stretches after a class at Downsize Fitness in Fort Worth. Lauren Silverman for NPR hide caption

itoggle caption Lauren Silverman for NPR

Not covered by Obamacare, but still sweet. Cristian Baitg/iStockphoto hide caption

itoggle caption Cristian Baitg/iStockphoto

Swimming is one form of exercise that can help prevent arthritis from getting worse, doctors say. iStockphoto.com hide caption

itoggle caption iStockphoto.com