(WO9516502-A1)      The treadmill exercise unit has two adjacent treadmills each with a continuous tread and. A frame pivotally supports one end of the treadmills. Two springs support the ends of both treadmills in a first position above a supporting surface. Two hydraulic cylinders resist downward pivoting movement of the treadmills from the first position to a second position as a user's weight is placed upon them.    The springs return the treadmills from the second position to the first when the user's weight is removed. The treadmills alternately pivot up and down about one end as a user exercises. Preferably, the treads are continuously driven by a motor. Rollers support the continuous treads. The treads are supported at one end via the axis of one of the rollers.    USE/ADVANTAGE -   Treadmill which provides aerobic benefits of both walking and stair climbing. Has dual reciprocating treads.    (JP9506796-W)      The treadmill exercise unit has two adjacent treadmills each with a continuous tread and. A frame pivotally supports one end of the treadmills. Two springs support the ends of both treadmills in a first position above a supporting surface. Two hydraulic cylinders resist downward pivoting movement of the treadmills from the first position to a second position as a user's weight is placed upon them.    The springs return the treadmills from the second position to the first when the user's weight is removed. The treadmills alternately pivot up and down about one end as a user exercises. Preferably, the treads are continuously driven by a motor. Rollers support the continuous treads. The treads are supported at one end via the axis of one of the rollers.    USE/ADVANTAGE -   Treadmill which provides aerobic benefits of both walking and stair climbing. Has dual reciprocating treads.    (EP746386-B1)      The treadmill exercise unit has two adjacent treadmills each with a continuous tread and. A frame pivotally supports one end of the treadmills. Two springs support the ends of both treadmills in a first position above a supporting surface. Two hydraulic cylinders resist downward pivoting movement of the treadmills from the first position to a second position as a user's weight is placed upon them.    The springs return the treadmills from the second position to the first when the user's weight is removed. The treadmills alternately pivot up and down about one end as a user exercises. Preferably, the treads are continuously driven by a motor. Rollers support the continuous treads. The treads are supported at one end via the axis of one of the rollers.    USE/ADVANTAGE -   Treadmill which provides aerobic benefits of both walking and stair climbing. Has dual reciprocating treads.