In testing the Exer-Genie® Exerciser, Scientists, Researchers and Coaches discovered that resistance was generated by winding the specially woven nylon training line around the smooth chrome plated metal shaft. Adjusting the resistance was easy and in a few seconds one could go from ounces to hundreds of pounds. Pulling on the training line not only controlled the speed at which a movement was trained, but also provided resistance that was proportional to the kinetic chain of the movement. Dynamic Life Movement Exercise was a major discovery! Training muscles through the movement equaled greater performance and Efficiency in Exercise™.

This was proof that the Exer-Genie® Exerciser provided an economical and efficient way to perform a variety of exercises and training methods. One breakthrough training discovery that came out of the testing was Variable Isokinetic Exercise. By grasping the trailing end of the line and controlling the movement of the Trailing Line through the Exer-Genie® Exerciser, one could implement Variable Isotonic/Isometric/Isokinetic Training.

Isotonic Muscular contractions are those movements based on lifting a constant amount of weight through a range of motion.

Isometric Muscular contraction against resistance is where the muscle fires but there is no shortening of the muscle and no movement at a joint. The benefit of isometric exercises are that they can be used for rehabilitation as well as general strengthening without placing stress on the joints. Some sports require a high level of static muscle strength; Gymnastics, Yoga, Rock Climbing, Downhill Skiing as well as holding a child, for example, all have isometric strength requirements.

Isokinetic Muscular contraction pertains to an exercise providing variable resistance to a movement at a constant speed with the assistance of specialized equipment. In isokinetic exercise, you maximize the resistance placed on the muscle throughout the full range of motion.