The Royal Double Station Sky Walker is a great exercise machine for two users, ages 12 and up. This American-made apparatus offers the same benefits of running - including burning calories and strengthening thighs and calves - but with less stress on the knees, hips and lower back. Reap the benefits of aerobic activitywithout the jarring motion of jogging by simply placing your feet on the foot pads, grabbing the handles and moving your body in a walking or running motion with an even stride. Monitor your heart rate to get the best out of the exercise, and keep the machine in top shape with its weather-resistant steel structure. Easy-to-read instructions can be found on both sides to help users fully engage their muscles and make sure that proper safety guidelines are followed. Perfect for local parks, fitness parks, and HOA, this machine is sure to help users keep fit in a fun and easy way.