A high-tech armband is helping athletes find their rhythm on the basketball court by playing a special tune when the athletes move their arms correctly. The “interactive throwing sleeve” extends from the knuckles to above the elbow and is form fitting, like a compression garment. It has two sensors, one at the wrist and another at the elbow, that are connected by thin conductive fibers. As the athlete shoots the ball, the sleeve measures the position, velocity, and acceleration of the arm. The information is wirelessly transmitted to a laptop so that the athlete can be monitored in real time. (Technology Review)