An elliptical trainer is a popular piece of fitness equipment designed to provide a low-impact cardiovascular workout. It mimics the motion of running or walking while reducing stress on the joints, making it suitable for people of all fitness levels. Users can adjust the resistance and incline to tailor their workouts, enhancing both strength and endurance. Ellipticals often come with various features, such as built-in heart rate monitors and workout programs, to help users track their progress. They are commonly found in gyms and homes, offering a versatile option for those looking to improve their fitness without the harsh impact associated with traditional running.