The Teeter FreeStep brings a new level of ease to exercising in your own home with a stress-free . zeroimpact cardio and strength workout. FreeStep takes the load off your back and joints . elevating comfort beyond traditional ellipticals . treadmills . and steppers while delivering exceptional calorie-burning results. Its patented stride technology is engineered to protect the knees . with a natural stepping stride that follows a smooth . linear path. The FreeStep delivers total body muscle engagement so you can tone and strengthen your upper body and lower body in one workout. With combined cardio and strength . the FreeStep has proven to burn 17.4% more calories than a recumbent bike! With 13 levels of resistance . progressive stepping power . and complete upper and lower body muscle engagement . you will see and feel big results while exercising in total comfort.