www.spingym.com - $40
For the body, SpinGym is a dynamic system for toning, strengthening and sculpting your arms, chest, back and shoulders. To give you the definition on the top and eliminate the sagging on the bottom.
Unlike traditional training with dumbbells and machine weights which isolate and target only one set of muscles at a time. SpinGym utilizes Gyrotronic Resistance Training (GRT). GRT uses integrated muscle engagement, simultaneously activating major, stablizing and core muscles - all at the SAME time.