For someone juggling television commitments and adventuring, Fox has engineered his fitness around what actually works for a demanding schedule. “I like Crossfit because it’s the perfect fit for an intense schedule,” he’s explained in interviews. When he’s not doing structured Crossfit classes, he’s designing his own HIIT training—which he describes as basically Crossfit without the rigid structure.
The flexibility matters because, as Fox admits, he gets bored easily. Rather than grinding the same routine into the ground until motivation withers, he rotates in cycling, running, and rowing. The variety keeps him engaged and prevents the staleness that kills long-term fitness. He didn’t spend 20 years in the military just to turn his training into a joyless grind now.