The VersaClimber 108 CM has been designed to meet and satisfy any fitness level. It now features shortened step height of only 10 inches. Where as the SM or LX series provide a deep 20 inch step, the CM was specially designed to provide a more relaxing, less intense workout. This provides a user the ability to workout in a more cruising, less intense, exercise routine--the CM essentially cuts the workload down by 50% while still providing the most effective total body workout and highest calorie burn rate.