Dynaflex's Dynamax Core Trainer generates up to 8, 000 RPM's and develops over 217 lbs of Dynamic resistance to maximize strength and conditioning. The Dynamax Core Trainer MT, which was designed for U.S. Military Special Forces, has been precisely engineered with aircraft aluminum. Incorporated is a high performance rotor with a built-in pull start.
This f'n thing really works! Really adds power to my punch.
kinglober 3 years ago