Q:

Would a person exposed to zero gravity for a long time have trouble riding a bicycle?

I just watched this video by Drew Feustel showing him having trouble walking upright after 197 days on ISS:
https://mobile.twitter.com/Astro_Feustel/status/1075889929119547393
They say once you have learned how to ride a bicycle you can never unlearn this skill (crossed hands excused)
It made me wonder: would people returning from space have to learn how to ride a bicycle the same way they have to learn how to walk again? What about hoverboards or Segways? 

A:

The overwhelming majority of physical issues stemming from prolonged spaceflight are due to loss of muscle and bone mass. Astronauts typically make a full recovery shortly (few months) after their return to Earth's gravity well. Provided they have the physical strength to push the pedals and keep the bike upright, a returning astronaut shouldn't have any trouble riding a bike.

