Bullworker
From Wikipedia, the free encyclopedia
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. Kobel, it continues to sell in Europe, Asia and the U.S.A.
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[edit] Design
The design of the original Bullworker is surprisingly simple: It consists of two sleeved, spring-loaded, contractible cylinders in the center, with two hand grips affixed at the outermost ends. Two opposing cables are also 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.
Although a number of improvements have been made to the Bullworker from its introduction to the present, including the replacement of the cables with nylon straps, the basic construction and principles of operation remain the same. Its relatively light and compact construction allows for portability and the performing of exercises while traveling about. The Bullworker is still marketed worldwide today.
[edit] Popularity
The Bullworker device became popular due to the ease of use and the growing popularity of isometrics in the U.S.A. It sold mostly through ads in comic books and magazines. Kobel's device allowed for the performing of 26 individual exercises.
