Calvin Johnson
Credit: Leon Halip / Getty Images

On game days, Detroit Lions receiver Calvin Johnson warms up with yoga. He told this month that it keeps his hips and hamstrings loose. "I know it's something that works for me," he said. Former Lions quarterback Drew Stanton – and Stanton's yoga-instructor wife – introduced Johnson to yoga. He now uses it for stretching, to relieve physical pain, and as a way to relax before shredding a secondary.