Patent ID: 8435160

Claim:
A shock-absorbing treadmill comprising: a treadmill having length, a front end, a back end, a left side, a right side, and an underside; a first air spring attached to the underside of treadmill at the front end, at the left side; a second air spring attached to the underside of the treadmill at the front end, at the right side; a third air spring attached to the underside of the treadmill approximately one-third of the length from the front end, at the left side; a fourth air spring attached to the underside of the treadmill approximately one-third of the length from the front end, at the right side; a first wheel rotatably connected to the underside of the treadmill at the back end, at the left side; a second wheel rotatably connected to the underside of the treadmill at the back end, at the right side, whereby the treadmill is allowed to travel back and forth slightly as the front end of the treadmill moves up and down with each stride taken by a person exercising on the treadmill; a weight sensor adapted to sense the weight of a person on the treadmill; at least one pressure sensor adapted to sense a pressure within at least one air spring; and means for inflating or deflating at least one air spring.