Velasquez tweets that he's back at gym after successful surgery

If you've ever wondered about the drive and dedication it takes to become a UFC champion, check out this tweet from heavyweight champion Cain Velasquez, who had surgery to repair his shoulder on Thursday, but was back lifting weights by Monday.

Velasquez had surgery to repair a 90 percent tear of his rotator cuff on Thursday, but that didn't keep him from heading to the gym and working out his lower body. He hopes to return to the Octagon by August.

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