I just tested today the”Raktor”, which you can use in the same way as the popular “Xco”. These two products are used as running and walking equipment as well as for functional sport training. Because of the forth and back movement of the granulate inside, opposite muscle chains work closely together to move from one direction into the other. This is a ”stop-and-go” training for the muscles, nerves and joints, with low speed up to an explosive performance. When you perform sport related movements, e.g. for golf the explosive golf swing into both directions, you can prepare your body well for the stability demands of your sport. Besides stability you train joint mobility, coordination as well as body and movement awareness.
I also use this kind of equipment for personal training purposes (e.g. toning) and to add variety to my outdoor workouts.
One more thing: I think it`s funky to see the granulate shaking – the product comes in a transparent mantle. Further compared to XCO: it fits a little better into the shape of the hand, the grip is more immune to liquid, you can clean it more easy and – it is about 50 $ cheaper than XCO. If you ask me, XCO is great and I like to train with it. But this is a worthy competetive product, and the plus factors make it worth a buy & try!
Website of the producer www.raktor.info