In order to properly portray a boxer, Jordan had to train like a boxer. That meant 45-60 minutes daily of cardio along with tons of ab workouts, like crunches, mountain climbers, leg raises, reverse crunches, and traditional sit-ups to build up his core and burn fat. As for building muscle, Calliet had Jordan focus on supersets — exercises where lifting or curling dumbbells are interspersed with push-ups or another workout. In addition, Calliet pushed Jordan with circuit training, building his endurance with quick rounds of burpees, box jumps, bench push ups, and side step-ups.
If that all seems exhausting, we haven't even gotten to the main event yet. A full three hours of boxing training following every workout day that includes the speed bag, the heavy bag, mitt training, and jumping rope. According to Jordan: "I felt muscles I didn't even know I had." Calliet agreed, saying "I wanted to make him look even more ripped than Apollo, and I think we did that."