There are plenty of fancy treadmills that can give you a solid cardio workout at home. The Resolve Fitness R1 Sled Tread is designed for more serious athletes. It is developed for HIIT, sports performance, and rehab. It comes with 7 levels of magnetic resistance and an air resistance system. You get a 24 x 62″ running surface.
The R1 tread has a heavy duty steel frame, 26lb. fly wheel, fixed 11% incline, and a 5″ LCD console. It can accommodate users up to 330lbs. You can use it for walking, running, pushing, and pulling.