Colorado Experiment

[1] It is of interest due to its claims that incredible results can be achieved with a small number of sessions using single sets of high intensity repetitions to momentary muscle failure focusing on negative or lowering multi-joint exercises.

[2] After stopping exercise for more than two years, 1970 Mr America, Viator was invited by Arthur Jones (inventor of the Nautilus machines) to participate in what was to be known as the Colorado Experiment.

The primary purpose was to prove or disprove the efficacy of pure Nautilus training in developing a champion physique.

This study was performed at a time where the vast majority of amateur and professional bodybuilders developed their physiques through traditional workouts involving the use of barbells, dumbbells, and cable equipment.

The results concluded that Viator gained more than 60 pounds (of muscular mass) in 28 days with only 12 (high-intensity) workouts, each of which were less than 30 minutes.

Nautilus-inventor Arthur Jones personally trained Casey Viator for every workout. Training was intense, progressive, and involved a negative-only repetition style on 50 percent of the exercises.