San Francisco 49er Jerry Rice, one of the greatest players to ever compete in the NFL, used to run a hill. In fact, it’s nicknamed “The Hill.” The steep incline was 2.5 miles up, and Rice ran it every day when the season was over. “It taught me endurance,” Rice said. “Being able to function when you’re really tired. “When there’s nothing else, somehow you find a way to dig a little deeper. So that last 800 meters, it made a lot of guys cry. It made a lot of guys throw up. That was part of my regimen during off season.”
