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A spike shoe has a cushion mounted on the outer sole thereof. The cushion has spike-accommodating bores defined therein and each spike is accommodated in a bore. The cushion compresses as the wearer of the shoe places his or her weight on the sole of the shoe. The spike-accommodating bores are sized

A spike shoe has a cushion mounted on the outer sole thereof. The cushion has spike-accommodating bores defined therein and each spike is accommodated in a bore. The cushion compresses as the wearer of the shoe places his or her weight on the sole of the shoe. The spike-accommodating bores are sized and shaped so the cushion adjacent to each bore contacts the spike accommodated in the bore during the compression of the cushion and prior to the cushion being fully compressed whereby each spike is wiped by the cushion every time the wearer places his or her weight on the shoe during a walking or running movement.

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A spike shoe has a cushion mounted on the outer sole thereof. The cushion has spike-accommodating bores defined therein and each spike is accommodated in a bore. The cushion compresses as the wearer of the shoe places his or her weight on the sole of the shoe. The spike-accommodating bores are sized

A spike shoe has a cushion mounted on the outer sole thereof. The cushion has spike-accommodating bores defined therein and each spike is accommodated in a bore. The cushion compresses as the wearer of the shoe places his or her weight on the sole of the shoe. The spike-accommodating bores are sized and shaped so the cushion adjacent to each bore contacts the spike accommodated in the bore during the compression of the cushion and prior to the cushion being fully compressed whereby each spike is wiped by the cushion every time the wearer places his or her weight on the shoe during a walking or running movement. ressures or above or below a selected range of pressures, (2) transmitting a signal to incrementally close the valve in a line having a pressure that is above the selected range of pressures, (3) transmitting a signal to incrementally open the valve in a line having a pressure that is below the selected range of pressures. 5. The system of claim 1, wherein the air mattress supply lines have stepper motor controlled valves for controlling the amount of air that can flow therethrough, the air mattress supply lines have pressure sensors interposed between the valves and the chambers of the air mattress for sensing the back pressure in the chambers of the air mattress, and, a control unit is operatively connected to the blower motor, the pressure sensors and the valves, the control unit receiving pressure signals from the pressure sensors and responding to those pressure signals by (1) determining if the pressure signal indicates if a pressure is within a selected range of pressures or above or below a selected range of pressures, (2) transmitting a signal to incrementally close the valve in a line having a pressure that is above the selected range of pressures, (3) transmitting