Even with the best of care, a treadmill is likely to require service at some point. A basic warranty should cover labor and parts (motor, electronics, and belt) for at least a year. Top manufacturers usually offer lifetime warranty on the frame and deck. Specialty fitness retailers usually have their own service staff that can tune-up your equipment when needed.
Do a Test Run
Literally. Go to the store with your sneakers on, get on the machine, and start experimenting. Try different inclines and speeds. Pay attention to how loud the machine is, but remember to take into consideration the ambiance noise in the store. Try to imagine the machine at home –-Will you be able to hear the TV over the motor hum? Is it quiet enough that you can use it early in the morning, when everybody else in the house is sleeping? How about comfort? Is it spacey enough for you to move freely or do your arms keep bumping into the side rails?
A good treadmill provides shock absorption and a smooth workout. A shaky ride is not only uncomfortable, but also bad for your knees and hip.
Consider Safety Features
While a basic treadmill will probably have console grips, many people feel more comfortable with side handrails, especially beginners or those with balance problems. Again, a test run will give you a better feel for the machine. Can you reach the console grips comfortably when you're walking on an incline? This varies considerably according to your height, so make sure the treadmill you choose works for you.
If you have young children at home, look for a machine that can be locked, password coded, or at least unplugged. Children may be tempted to imitate you and risk serious injury.