At the top of the Dynaflex Gyroscopic "food chain" is the DynaMax Core Trainer 2! Just pull the easy starter cord, and hold on for the gyroscopic ride of your life! Instantly, you'll start experiencing body sculpting variable dynamic resistance building within the machine's internal gyroscope, giving you a remarkable core and upper body workout in a fraction of the time. The question is how can a machine weighing a scant 3 pounds deliver up to 8,000 RPMs, and produce up to 200 pounds of resistance? The only way to understand the Dynamax difference is to try one for yourself!