Gyllenhaal’s workout regimen, focusing on his boxing skills and strength training:
• Jump Rope
Each day started off with jumping rope for 15 minutes straight.
Then the actor did three rounds (for a total of nine minutes) of footwork defense drills.
Also in the mix was a forward-step drill focusing on learning different punches and combinations – six rounds for 18 minutes.
• Bag Drills
“We would go into heavy bag drills with him hitting the bag strap, which is designed to guide you to perfect punches. He would also go into double-end bags, which move back and forth, and speed bag drills – three rounds each,” Claybon says.
• Sit-Ups, Pull-Ups and Dips
Gyllenhaal started with 500 sit-ups a day, but by the end, he was up to an impressive 1,000. He also included 100 pull-ups and dips into this routine.
• Strength training
“We had a 300-lb. tractor tire that we would have to flip over 20 times. Then we had a sledgehammer drill where he’s hitting the tire with a sledgehammer for three minutes nonstop – that was a really intense drill,” Claybon says. “We also had squat drills where he was doing speed squats for two sets of 100.”
Claybon required Gyllenhaal to run five miles every other day, but because the actor was a natural runner, “five days a week he was running eight miles,” Claybon says.