A treadmill is a piece of exercise equipment designed for walking, running, or jogging while staying in one place. It consists of a moving belt that allows users to walk or run at various speeds and inclines. Treadmills are popular in gyms and homes because they provide a convenient way to exercise indoors, regardless of weather conditions. Most modern treadmills come with features like digital displays that track time, distance, speed, and calories burned. Some models also offer preset workout programs and heart rate monitors. Using a treadmill can help improve cardiovascular fitness and support weight management, making it a valuable tool for many fitness enthusiasts.