Mark Zuckerberg joins UFC’s Max Holloway for some serious training, continuing his MMA journey ahead of potential 2025 plans.

While you may know Mark Zuckerberg as the awkward founder of Facebook, this CEO is getting hardcore with his workouts. "His neck swells wider than his jaw. His shoulders are capped with muscle.

Facebook CEO Mark Zuckerberg works out three times a week ... Here's what Zuckerberg said when Arnold Schwarzenegger asked him about his workout habits: Staying in shape is very important.