Jack Osbourne grew up in the public eye on MTV’s Meet the Osbournes, so we all watched as he transformed from a troubled teen with substance abuse issues to a healthy, happy family man. But when Osbourne was diagnosed with multiple sclerosis in 2012, his health became even more of a priority. He turned to CrossFit and a "pretty insane" regimen of vitamins and hormone therapies to manage his symptoms. "Right now am I going to be in a wheelchair? No," he says. "But if I don't take care of myself, who knows?"
You can use your keyboard to see the next slide ( ← previous, → next)
See which stars turn to this intense workout to stay in amazing shape
See which stars turn to this intense workout to stay in amazing shape.