We previously mentioned that Matthew Fox got CRAZY ripped for his new movie Alex Cross.
Well he was recently doing a photo shoot for Men's Fitness magazine and started talking about what it took get that insane body.
He exercised different muscle groups back to back to back until he felt like he was going to throw up.
That's the kind of dedication it takes to get a body like his.
Check out the video (above) to hear all about what it took to transform from Matthew himself!