I've have this exercise bike for about 25 years and it still works great. I use it about an hour a day. My teenage daughter has been using it about once or twice a week for about 30-60 min at a time. She never asked if this was ok and quite frankly I think she should get her own or go join a gym. The bike is mine and have taken care of it and I'd hate for it to get more worn out from someone else using it without contributing in some way, so I told her to either buy one for herself or she can use mine but I will raise her room & board a few dollars a month if she wants to keep using it. Does this sound like a reasonable idea?