In boxing, you don't get a nickname like "The Greatest" unless you have the skills to back it up. Muhammad Ali was the quintessential champion: lighting-fast footwork, powerful jabs, and a larger-than-life persona. Like most heavyweight boxers, Ali didn't use weights to ready for a fight. Instead, he relied on calisthenics and smart dieting. Perhaps more than any other fighter on this list, Ali was simply a natural. The champ's raw talent and genetic makeup is something that comes along once in lifetime. Want to get fit like Ali? Check out this rundown from Men's Fitness on how Ali got his physique and start throwing knockout punches .
Garrett became so obsessed with his training that Gonzo would occasionally have to tell him to pump the brakes. Martin's football team lifted three times a week during their season—Monday, Wednesday and Friday. Since they also played games on Friday nights, the Friday lift was supposed to be more of a warm-up than anything. Coaches just wanted the players to get a little sweat going and spark their system so they'd be ready for battle come kickoff. But Garrett didn't always understand that concept. During one Friday pre-game lift, Gonzalez turned around to see him banging out Squats with 315 pounds on the bar. When Garrett reflects on his high school days now, it's clear that his own potential was the driving force behind his insatiable work ethic.
During the first session of the second stage of initiation, they learn that it will involve simulations that teach them to control their, as stated when they first arrived, emotions in the midst of a frightening situation. The simulation will only end once they calm down, hence lowering their heart rate and slowing their breathing. The fears in their simulations may take the form of their real and physical fears, or symbolic manifestations of their emotional fears, which is the case for Tris' first situation: being devoured by crows which, as later revealed, refers to her fear of being powerless.