The inside of the device the forces generated against your arm build as well. Effectively this is the same as carrying around a set of dumbbells in your pocket! When first using the device, muscle burn and discomfort can occur, as is normal with any exercise, but this fades over time if used regularly as the muscle will tone and strengthen. If for some reason you have an injury to your arm or wrists then the Powerball can be used by anyone from young children to old aged pensioners due to it's dynamic, non-impact nature. With its gentle yet dynamic, non-impact nature and compact size it can be used in a fitness sense for the arms, wrists and shoulders helping to build, tone and strengthen the muscles and ligaments in the hands, wrists, arms and shoulders. The Powerball (or hand held gyroscope) is a truly dynamic object, there are no batteries and no electricity used, unless you have a model with a rpm counter. The smooth, dynamic, non-impact nature and compact size it can be used in a fitness, sports, rehabilitation or fun manner. This article will explore what Powerball is and how it does it's magic. All athletes need to build strength

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