Indoor cycling burns serious calories (about 450 in 45 minutes) and offers an awesome aerobic workout that gets the heart rate going. It also tones your quadriceps (front thigh muscles) and outer thigh muscles like nobody's business! Because you stay in one place with the same basic movement throughout, indoor cycling doesn't involve a lot of coordination; it's easier to concentrate on your form than in other types of aerobic classes. And although you follow the general instructions of the teacher, you are in control when it comes to your pace.You can finish a cycling class, regardless of your fitness level, simply by adjusting your pace or the resistance knob on the bike. Our bikes are Schwinn IC Pros and are SPD/LOOK compatible.