Runners can go at speeds ranging from 0.5 to 10 mph, and the incline can be adjusted from 0 to 10% to adjust the amount of challenge involved. Contacts in the grips monitor heart rate, allowing for easy self monitoring. The TRIflex deck is built to be cushioning, offering some shock absorption and strong support. The frame is made large and heavy, increasing durability. The motor itself is backed by a lifetime warranty, and the general construction is backed by a 1-year parts and labor warranty.