The Stick Sprinter Stick is for anyone. Its stiffness means it is the one that is most useful for working deeply on specific areas or knots, especially on areas of large muscle mass where a lot of pressure needs to be applied. Can be used for longer massage strokes too with little pressure needed..Features:Improves strength.Increases flexibility.Extends endurance.Accelerates recovery time.Reduces muscle soreness, stiffness and pain.Prepares muscle for rigors of activity.Flushes muscle from rigors of activity.