One of Rollins' biggest passions in life is cross fit. It isn't just a training regime, it is a lifestyle choice. His involvement in cross fit is the biggest reason that his body has transformed so dramatically in the last few years, indirectly leading him to the WWE Championship. It is a passion that he takes personally. He now operates a cross fit gym alongside his wrestling school. You'll also see him regularly tweeting and using instagram to post pictures of cross fit gyms he has used on the road. Cross fit is essentially a physical philosophy of training varying elements in high intensity intervals. The varied approach allows physical development beyond what just sitting on a bench and lifting would achieve. It is proving increasingly popular with WWE superstars who are looking to improve conditioning, with the functional fitness being advantageous to the athleticism needed in the WWE ring.