How Boxers Build Superhuman Cardio Explained

Transcript

Roadwork runs. Muhammad Ali made road work a ritual, running before sunrise through the streets of Louisville. Mike Tyson pushed it further, waking at 4:00 a.m. to run 3 to 5 miles in heavy boots. For boxers, this kind of long-distance running is the foundation of cardio. It usually means covering 3 to 6 miles at a steady, moderate pace. The goal i... Read More