Researchers studied the gut microbes of runners from the Boston Marathon, isolating one strain of bacteria that may boost athletic performance. Nicolaus Czarnecki/Boston Herald via Getty Images hide caption
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athletic performance
Alexander Naddour, of the U.S. men's gymnastics team, bears the circular mark of cupping on his right arm as he prepares to compete on the pommel horse at the Rio de Janeiro Olympics on August 6. Alex Livesey/Getty Images hide caption
Detweiler was surprised to learn she wasn't eating enough to fuel her training regimen. As an athlete, doctors and nutritionists say, she needed more food variety and more calories — three snacks daily, as well as bigger meals. Courtesy of Nationwide Children's Hospital hide caption
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