Institute consisted of over 200 experiments over a ten-year period. Theodor Hettinger published his book Physiology of Strength. They both developed a training program based on isometrics exercise.

In the 1960s, professor James A. Baley put isometrics to the test with a class of 104 college students at the University of Connecticut to study the results on tests measuring increases in strength, endurance, coordination, and agility. The original article showed significant gains after a