A spin bike is better than a treadmill if you have chronic knee problems, and if you are looking for a more intense cardio workout. A treadmill offers more impact on your joints than a stationary bike. If you have knee or ankle problems, you should use a spin bike instead of a treadmill.
A spin bike provides a more intense cardio workout than a treadmill because it gives you the option to stand while pedaling the bike. When you stand on a spin bike, it forces you to use your core and leg muscles in order to maintain balance. This action causes your heart rate to spike, which will increase the intensity of your workout.
On the other hand, when you stand on a treadmill, there is no resistance from the machine itself. All of your energy is going into balancing yourself on the machine. This means that your core and leg muscles aren’t getting worked out as intensely as they would be if you were pedaling on a spin bike.
If you are looking for a less intense workout that will still get your heart rate up, then I would recommend using a treadmill over a stationary bicycle.is a spin bike better than a treadmill