Much of modern life takes place in a seated position � although the human body is designed for movement. The ONGO� Seat strikes a balance between these apparently conflicting needs. Naturally, you can sit on it - dynamically. But you can also move on it: The curved base responds to any shift in weight, activating the body's musculature. The innovation: the ball track built into the foot of the ONGO� Seat gives acoustic feedback on every movement. It's time to say goodbye to unhealthy habits of sitting still. When you hear the ball humming along the track, you know you're moving in the right direction.