Abstract: The present invention is a piece of exercise footwear that simulates an uphill exercise or a downhill exercise that includes a continuous curved flat or concave sole with a front portion and a back portion that can be in continuous contact or not with an exercising surface while a user is exercising on an exercising surface and an inflatably adjustable bladder assembly with an inflatable sole portion and an inflatable heel portion. The exercise footwear also includes a control valve to allow inflation of the inflatable sole portion and the inflatable heel portion to allow a supplemental uphill or downhill simulation while performing the exercises and a transfer valve that transfers pressure and fluid interchangeably between the inflatable heel portion and the inflatable sole portion. A front pad insert and a heel pad insert can also be utilized and the inflatable adjustable bladder assembly can also be removed.