Indoor cycling builds muscle while improving your fitness level. During an indoor cycling, expect to train in different simulated cycling terrains, such as flats and hills. Practicing standing and seated positions adds variety to your workout to get you in and out of the saddle. Some classes even include jumps, which involve coming in and out of your seat while maintaining a steady pedal stroke. This can be an intense workout for beginners, so don’t worry if you need to take a break or slow down.