Lifespan Vertex Stair ClimberAchieve your fitness goals with a complete cardio and strength workout with the Vertex Stair Climber. Features a steep, wide step and a range of speeds to set your pace. Key Features THE ICONIC STEP MACHINE Experience the commercial grade step machine with revolving stairs to create a workout similar to true stair climbing. Take the monstrous machine from the gym to your home. ST14 provides a great workout for you. Change your stride, add some lunges,