Bullworker of the 1960s
Bullworker, also known as Tensolator, is an isometric contraction tool sold since the early 1960s. It was invented and marketed by the German inventor Gert F. Kölbel, still sold in Europe, Asia and USA. Structure wikitesto modification
The appliance is made of different materials: steel, perlon, thermoplastic materials, linen and is entirely chromed. Inside there is a spiral steel spring. The Perlon guides contain steel cables. With Bullworker you can run 26 exercises and it is extremely durable, confirming that still today many Bullworkers dating back to the 1960s are used.
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