Muscle Endurance
Muscle endurance is characterized by doing consecutive muscle contractions for a long period of time. When you use a spin bike at a moderate intensity, you can increase the muscle endurance in your legs.

Strength
Working out on a spin bike utilizes a lot of muscles. The glutes, quads, hamstrings, calves and even abs are all targeted. Working out on the bike can help tone and strengthen these areas, especially if you turn the resistance up high so you have to stand to pedal.

Non-impact
People who have joint issues should not place too much downward force on their legs, because it can exacerbate their condition. Spin bikes are used in a seated position with no force coming down on the joints, making it a safe, non-impact exercise.

Convenient
Spinning classes are led by an instructor. There can be anywhere from 18 to 20 people in the room, and there is loud, upbeat music playing. This can be beneficial if you have never used a spin bike before, or if you have a hard time getting motivated to exercise. Once you learn how to use the bike, you can incorporate it into your own workouts without having to rely on an instructor.

Variety
You have the options of pedaling in a standing position, seated and forward or reverse motion. Giving yourself variety ensures that you will not get bored of the same repeated action over and over.

Posture
Having bad posture can lead to muscle imbalances and slouching. When you work out on the spin bike, you need to engage muscles in the hips, back and shoulders to stabilize your body. This will improve your posture and your balance at the same time.