The Zero Runner® ZR8000 is a revolutionary innovation that is the first true alternative to a treadmill, delivering all the benefits of walking and running, but without excessive stress on the body. Independent hip and knee joints let exercisers customize natural running motion, but eliminate repetitive impact that can compromise form, cause fatigue and lead to injuries. Unique stride tracing technology enables users to monitor and adjust their form throughout workouts for a better performance. Moreover, the exclusive CROSS CiRCUIT program combines cardio and strength and flexibility exercises for valuable cross training options and greater fitness.