Cascade Ultra Runner Plus Curved Self Powered TreadmillThe Cascade Ultra Runner Plus not only gives you all the exercise benefits of a self powered curved treadmill, it gives you the option to add 6 levels of magnetic resistance to add higher intensity interval training. Walk or run at your own pace then add resistance to burn more calories and add variety to your workout. Upper and lower handlebar positions accommodate all user sizes and facilitate different exercises, including sled conditioning.