A force to cause myself with NSD Powerball Neon White Pro Signature White (256g), I wanted to take heavier and work more slow the rotational motion in order to improve endurance in the arm but also my speed of rotation. The Kernpower IronPower Force Two, the made to its higher weight as the NSD, you can boost the sensitivity in the fingers. Inertia is much stronger and forces us to have a more regular motion. I do not feel compel to force at all costs to increase speed. I consider this tool as an attractive element rehabilitation and less noisy. Its mass is heavier, it rescent easier the effect generated by the gyroscope.
