Arthur Jones

Arthur Jones was born November 22, 1926, and worked in diverse mechanical and engineering roles before turning to exercise equipment design. In the 1960s, he developed the Nautilus cam, a variable-lever-arm cam that altered resistance through a movement’s range of motion to better match muscle capability, and used that principle to build a line of exercise machines marketed under the Nautilus name. His machines contrasted with free weights by controlling movement paths and resistance curves, and they were widely adopted in commercial gyms and by serious athletes. In June 1970, Jones published 'The Ideal Workout' and other writings promoting brief, very intense, low-volume workouts (HIT) and arguing that muscular gains come from high effort rather than high volume. These publications and his marketing helped trigger the Nautilus boom in the 1970s and shaped training philosophies in bodybuilding and general fitness. Jones continued to lecture and publish on exercise science and appeared in recorded seminars and interviews discussing technique, resistance profiles, and training theory. Nautilus equipment and Jones’s training principles influenced generations of trainers and the design of many modern strength machines.