Muscles work against the inertia of the load, getting a dynamic load, which is several times more useful than normal load! It is a fantastic training effect!
Did you know that EVNIK
creates a 5-10-24 LBS load!?
Evnik is a patented technology.
MASS + SPEED = KINETIC ENERGY! Movements made with EVNIK simultaneously build-up and release a lot of energy. Oscillatory movements increase the loads produced by EVNIK 25-fold and beyond — up to 4, 8, 10, and even 12 LBS!