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The problem is that Volleyball requires me to touch the ground a good amount of time for each train. And I have thought about it, I can probably use that arm straps when we get to a physical part of the training, otherwise I don't think the protection will be enough. (I know people don't consider volleyball an aggressive game, but with the level of competition it gets pretty rough) :D

Yeah, you probably have to wait for 3rd party gear integration like soles or so.