Figure 1. A schematic of how real-time EMG biofeedback might be utilized. The athlete is preparing for a full effort vertical jump as part of the drop vertical jump as the EMG activity is recorded at three sites (far left). This data is streamed in real-time to a PC where the data are converted into a dynamic stimulus (in this case a triangle shape) in which the three angles of intersection correspond with values of muscle activation. The goal in this case is for the athlete to “animate” a shape that matches the black outline of the equilateral triangle (far right).