Before you purchase a treadmill you need to know what features to look for to be sure you are getting the best one for you and your needs. Some things to look for are:
The Motor: A motorized treadmill has an inbuilt motor that makes the belt and lift operate. A bonus of motorized treadmills is that they let you raise and lower the incline easily. With motors you can change the pace of your workout how you need it to be.
Horsepower: The horsepower is the measure of the treadmill motor. The continuous horsepower is how well the treadmill can work without lagging. The peak horsepower is how much power the treadmill has for short bursts.
Incline: The incline is used to mimic the natural human style of walking or running. Manual incline lets you change it yourself by speeding up your pace. A power incline lets you adjust the incline while you are walking or running.
Belts and Decks: A thicker belt gives you more cushion for your legs and joints. Short belts give you a faster pace and some people prefer these.
Speed: When you think of a treadmill, you often think of the speed. Most go from 0 to 10 MPH.
Computer Controls: Treadmills all have some type of computer control to keep them going. Many have odometers and speedometers and some even have pre-programmed workouts.