NSD Powerball has hit the fitness market with a fury and we guarantee that it's here to give you a full arm workout quite unlike any other you'll ever have experienced regardless of current fitness levels.

Its secret lies in the way it isometrically tests the muscle groups in the arms and shoulders - you can have the ability to curl the heaviest of dumbbell's down in the gym but take a NSD Powerball up to 13,000 rpm for just 30 - 40 seconds and we absolutely guarantee a muscle burn of monumental proportions.

Dense muscle growth - or just toning?

Depending on the speed you use it at - NSD Powerball will generate a gyroscopic resistance of between 0.5 kg to 18 kg.

The Powerball is for ladies too! At low speeds it will effectively tone and shape the arms and shoulders yet without leading to unwanted muscle growth in these areas. Excellent results can be achieved from using it at between 6000-8000 rpm for around 7 minutes each day.

Spin it up above 12,000 rpm however and it takes on a whole new character - the resistance climbs in proportion to the speed of the internal rotor and at 15,000 rpm the pocket sized NSD Powerball is spitting out up to 18 kg of gut wrenching torque (inertia) and will give a serious hammering to even the most powerfully developed arm.

The internal rotor of your new NSD Powerball has been so perfectly balanced that even at the highest speeds there is absolutely zero vibration - all you will feel are those powerful gyroscopic forces acting upon your hand, wrist, arm and shoulder once you put the rotor into motion.

And there is no motor in there - speed is generated simply by the subtle movement of the wrist and arm muscles which is what makes it such an extraordinary toning or muscle building tool!

Unlike a free weight dumbbell which will traditionally work on one specific muscle group with each exercise, development with a NSD Powerball takes place throughout the full range of movement and will test up to 90% of the muscles in the arm in a single 7 minute session - simply decide on the speed you want to use it at and let it rip!

50 different Dumbbells in your bag

Keep the Powerball where convenient NSD Powerballs almost unlimited resistance range in that 0.5-18 kg band combined with its pocket sized compact design is like having instant access to 50 different dumbbells - all of which you can bring along in a bag and use

• While on a break in the office
• Sitting in traffic in your car
• Travelling on the train

...or anywhere that you've got a spare 5 minutes to give your arms a quick tone up or pump!