... light ,dynamic ,easy to learn and so on.2, by a variety of tests ,blood products ,increased fitness ,weight ... ,can bring the body joint movement of products .3,by a variety of tests ,blood products ,increased fitness ,weight ... a feel ,elastic is appropriate ;4, was accompanied by the best exercises for beginners to neesd help;first began ... and brace three-piece :grard ,elbow pads ,knee pads) shoe