From the point of view of fat burning effect, under the same intensity, the fat burning effect of treadmill will be slightly better than that of spinning bike. But that doesn't mean you should choose a treadmill to lose weight. Each exercise mode has its advantages and disadvantages, and you can't choose to lose weight just by how many calories you consume. Spinning bike is easy, energetic and easy to stick to, and it can fully exercise the legs and shape the perfect leg lines. But if you do it incorrectly, you may hurt your knees or ankles. The treadmill is equipped with shock absorbers. When the running speed is not very fast, jogging and brisk walking are very suitable for losing weight on the treadmill. However, people's running rhythm can easily not keep up with the rhythm of the treadmill, resulting in different degrees of knee joint injury. The elliptical trajectory of the elliptical machine minimizes the damage to the knee joint, and the amount of exercise is larger than that of the spinning bike, because the elliptical machine can exercise all over the body.