You don't need a bicycle to get the benefits of cycling

3) Raise both legs up to the ceiling or as far as your hamstring flexibility allows, keeping your lower back flat on the bed and engaging your core muscles. Start cycling forward for 20-30 seconds, then reverse cycle for another 20-30 seconds. Repeat this for three or four sets, making sure your legs don’t drop down. The speed depends on your fitness level, so go slow if you’re a beginner. This exercise works your endurance and you should feel your thighs burning at the end of it.

I don't know about you, but I’m not a big fan of stationary cycling indoors or real cycling outdoors.

The saddle hurts my buttocks, and after a spin class at the gym, my sitz bones (the bottom part of the pelvis) remain sore for a few days and sitting becomes uncomfortable.