Bullworker
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The Bullworker is an isometric exercise device used for strength training originally marketed and sold in the early 1960s. Designed and patented by German inventor Gert F. Kölbel, it continues to sell in Europe, Asia and the U.S.A.
[edit] Design
The original Bullworker consists of two sleeved, spring-loaded, telescopic cylinders in the center, with two hand grips affixed at the outermost ends. Two opposing cables are attached to the hand grips at each end of the device. Exercises are performed by pushing inwards on the contractible cylinders or by pulling the cables outwards, away from the cylinders. The resultant compression of the internal spring creates the desired resistance; the Bullworker returns to its original position when pressure is released. Hence a range of 1 to 200+ pounds of resistance is possible with a device weighing only four pounds.
Although a number of improvements have been made to the Bullworker from its introduction to the present, the basic construction and principles of operation remain the same. The Bullworker is still marketed worldwide today, with Trademarks and distribution owned by Hughes Marketing, LLC. There are currently two models, the Classic & Steel-Bow. Both models are identical in design and function, with the Classic a "barbell" size and the Steel-Bow a "dumbbell" size for more precise muscle targeting.
The original allowed for the performing of 26 individual exercises, providing a complete body workout. While Isometrics was the emphasis, the instructions included routines of: Isotonic, Cardio, Resiliency and Endurance. Today, the emphasis on these additional fitness routines has greatly expanded the number of exercises available. An additional fitness routine of Iso-Motion has since been added. It was extremely popular, selling over 9 million units worldwide in 15 years. An extremely durable device, many are still in use 40 years later.
