![]() In fact, by the middle of the 1980s sales of the Bullworker exceeded $4 million (which at that time was a great deal of money :-) ![]() Tensolator, is that it was a phenomenal marketing success. What’s interesting about the Bullworker a.k.a. Koelbel.Īs mentioned earlier, this was probably one of the first pieces of isometric exercise equipment that utilized static contraction. The name of this German inventor was Gert F. ![]() This isometric exercise device utilizes the principles of static contraction/isometrics as well as isotonic training. The Bullworker also known as the Tensolator was created by a German inventor. If you are at all familiar with isometrics then you may want to take a moment to learn about how an inexpensive isometric exercise device called the Bullworker can help you build muscle and increase your strength by over 300% in less than 30 days. Are you familiar with Bullworker exercises?
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