Powerspin Evo Arm, Tricep & Shoulder Workout

Powerful, efficient upper body & arm exerciser which rapidly tones or builds muscle depending on the spin speed of the internal steel ball.
Utilizes isometric resistance to quickly engage a higher percentage of muscle fiber compared to regular isotonic free weight training.
Small, light and portable fitness product can be used as a home exerciser, in the office or as an efficient pre-sports warm up accessory.
Produces visible, measurable results within a 30-day time frame for both male and female users, regardless of current fitness levels.
Develops 100% non-impact resistance which may be used to rehabilitate elbow RSI, upper arm and shoulder impingement injuries through enhanced blood flow and tendon strengthening.