Motocross has become an increasingly competitive and technical sport in the last 10 years. In this episode, APU’s Dr. Gary Deel talks to professional supercross racer AJ Catanzaro about turning pro when he was just 16 years old and how the sport has changed during his 10-year career. Learn about the evolution of course layouts with increasingly dangerous elements, technological changes to motorcycles and protective gear, and why he hopes electric motorcycles will soon be an option in professional racing.

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