Littlegman
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- Jan 24, 2014
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This product has been around for decades. I remember it being marketed in the 70’s as the “Dyna –bee” (“As Seen on TV!”). Not surprisingly, it lives on to this day, virtually unchanged!
This from a vendor: “The Finer Fitness Dyna-Flex Power Ball has an internal gyroscope that spins and rotates against internal resistance to increase the RPMs. The power ball is great for building up wrist strength as well as fret-hand and strumming-hand strength and dexterity. “
Back then, I only saw it for its sport applications where wrist strength was important: baseball and kung fu. Apparently, the activities for which this will provide benefits are endless, including fretting and strumming!
http://www.musiciansfriend.com/accessories/finger-fitness-dyna-flex-power-ball
This from a vendor: “The Finer Fitness Dyna-Flex Power Ball has an internal gyroscope that spins and rotates against internal resistance to increase the RPMs. The power ball is great for building up wrist strength as well as fret-hand and strumming-hand strength and dexterity. “
Back then, I only saw it for its sport applications where wrist strength was important: baseball and kung fu. Apparently, the activities for which this will provide benefits are endless, including fretting and strumming!
http://www.musiciansfriend.com/accessories/finger-fitness-dyna-flex-power-ball