Choosing between a treadmill, elliptical, exercise bike, or stair stepper ultimately depends on your personal fitness goals and preferences. Here are some things to consider: Treadmill: Treadmills are versatile and allow for a wide range of workouts, including running, walking, and jogging. They offer a high-impact workout that can help you burn calories and improve your cardiovascular health. However, they can be hard on your joints, so they may not be the best choice...