A treadmill is a popular piece of cardiovascular fitness equipment used for walking, jogging, or running indoors. It typically consists of a motorized conveyor belt that allows users to walk or run in place while staying in one location. Treadmills feature a motorized belt that moves at variable speeds, allowing users to control their pace and intensity of exercise. Many treadmills offer adjustable incline and decline settings, simulating uphill or downhill terrain to increase the intensity of workouts and target different muscle groups.