Exercise Bike (Pickering YO18)

Hi, the physio dept at my doctors has recommended exercises for 4 months before I have a leg X-ray. One involves using an exercise bike. I dont have one and as a pensioner, I'd like to borrow or be gifted one, please. Either the larger, stationary bicycle type or the smaller, just-pedals type will be great. My son can collect the bigger style in his large estate car, if I'm lucky to be offered this type.