A simple and economic resistance exercising tool that can give improved strength and mobility to shoulders, forearms, wrists and hands as well as being an effective treatment for Tennis Elbow.Improved grip is given by the ridged surface, making it easier to perform exercises such as wrist abduction and thumb strengthening. Theraband is a highly respected name that is trusted and used throughout the NHS. The Theraband Flexbar comes in four colours, each one offering a differing level of resistance. The Green Flexbar gives medium resistance.