Conor McGregor

Calories: 3,186

Exercise: 8 hours a day

While eight hours a day might seem like an insane amount of exercise, the FC champion Conor McGregor doesn't stick to a strict workout regime, according to Bodybuilding.com.

"I wake up, I drink water, I stretch, I begin to loosen up, and then I continue moving throughout the day," McGregor said. "I'll hit the gym or whatever I feel like at that particular time, or I'll take a class of taekwondo, jiu-jitsu, yoga, or capoeira. Sometimes, I'll box. Variety is the best way. For me, regime doesn't work."

He added that he's "always eating good food" and is rarely caught eating take-out.

"I love water and coconut water, but I never drink energy drinks — ever!" he said. "I just eat good, quality meat and keep hydrated."