1.   At the gym, says Namey, the stair stepper, cross-country ski machine and exercise bike put less strain on your knees than the treadmill.

2.   He worked out on a stair stepper to build his quads for the sand.

3.   Stair steppers.

4.   The Pittsburgh club, beneath the airport concourse, has treadmills, a Versaclimber, stair steppers, rowers, bicycles and weight equipment.