Watch Strongman Eddie Hall Take on a Workout With the U.K.'s 'Fittest Man' CrossFit athlete Zack George joined Hall for a boxing-focused strength session. May 10, 2021 "CrossFit, in my opinion, is one of the hardest sports you can do on the planet," says Hall. "The endurance and strength this man has is through the roof." Hall plans to execute a shoulder workout that will help his boxing. "I'm predominantly training as a professional boxer at the minute," he explains to George before their workout. "For me today, it's about working the muscles that are good for boxing. So it's good throws, good sides, good rears...anything to build the overall shoulders."