Today Isometrics is still recognized as a viable training protocol to increase strength and build muscle mass quickly. Yet so many “muscle heads” poo poo the undeniable scientific results. Interestingly enough Isometrics is one of the few muscle building training systems that is backed with scientific proof.

One doctor reported strength gains of as much as 300%.Īnd so was born the Isometrics craze. Later on these results were substantiated by dozens of other researchers. What was amazing about the Isometrics research is that Hettinger and Muller discovered that an “intense contraction” against a fixed object, increased the subject’s strength by as much as 5% per WEEK! Even thou the contraction was only held for 6 seconds and only once a day. But, I’ll get back to that in a little bit. This research done at the Max Planck Institute in Germany was where Gert F Koelbel, got the idea of creating the Tensolator, later renamed the Bullworker. This contracting and tensing against their bindings had resulted in this incredible muscular growth.īut, it wasn’t until two German physiologists, Hettinger and Muller in 1953, to apply this Isometric technique to healthy individuals and to scientifically measure the results thru the use of a dynamometer.

The frogs that had their legs bound had strained against the bindings struggling to get free. The scientist sought to figure out what had happened.

In one experiment, using a frog, with its legs tightly bound together to prevent any movement and kept that way for a long time, scientist discovered that the frogs legs were significantly larger and more muscular than the control group of frogs who’s legs were not bound. In the 1920’s scientist studying the effects of inactivity on the muscles discovered a startling revelation.

Bullworker x5 abs