Powerball 280Hz Classic blue arm exerciser PB688B

The Powerball 280Hz Classic in blue is a compact hand exerciser built around gyroscopic resistance. As you spin the outer casing, the rapidly rotating inner mass creates resistance that works the forearm, wrist and fingers. Weighing 250 g, the device suits strength training, muscle conditioning and recovery exercises.

It needs no battery or power source, since the resistance comes entirely from your own effort. According to the manufacturer, the ball runs smoothly and without vibration at speeds of up to 15,000 rpm, so it remains comfortable to use in quiet surroundings.

Its handy size makes it easy to take anywhere, whether at the office, on the road or for training outdoors.