Electric treadmills are exercise machines that allow users to walk, jog, or run indoors. They feature a moving belt powered by an electric motor, which provides a smooth surface for users to exercise on. Many models come with adjustable speed and incline settings, enabling users to customize their workouts according to their fitness levels. These machines often include digital displays that track important metrics such as time, distance, speed, and calories burned. Some electric treadmills also offer pre-set workout programs and heart rate monitors, making them suitable for both beginners and experienced fitness enthusiasts looking to improve their cardiovascular health.