He gained 63 pounds in 28 days… That’s what Arthur Jones claimed happened during the famous Colorado Experiment with Casey Viator in 1973. And even today, most people still don’t believe it. At the time, bodybuilding was dominated by extremely high-volume training. Endless sets. Endless exercises. Hours in the gym every day. But Arthur Jones believed almost everybody was training completely wrong. He thought people focused way too much on volume and not nearly enough on intensity. Then came the