A treadmill's maximum incline should suit your fitness level. Test the machine's stability during incline mode before you buy. Walkers need a speed capability of 5 mph, runners need 8 to 11mph . Look for a safety key if you have kids . Children and pets should not be able to start the machine by accident.
Experts say refrigerator magnets can start some machines that use a magnetic key.
Go for a model with a panic button or automatic shutoff . If you slip or get into trouble, the power should cut off instantly by means of a button you push or a tether attached to your clothes. Read the fine print on the warranty . If you're heavier than the warranty specifies, the contract may be void. Avoid 90-day warranties, and don't purchase coverage plans from the retailer.