Figure 3. A lateral jump and hold task in which the athlete stands on the right leg (left) and then jumps laterally (middle) and lands on a predefined point on the floor with the opposite leg (right). During this task it is possible to compute a center of mass through the use of an accelerometer or gyroscrope and display a bubble level type of display to orient the athlete to her balance performance throughout the trial. The goal of this task is to keep the bubble in the center of the bubble level display.