Young Blonde Girl Reveals Her White Top And Short Jeans On The Stationary Exercise Bicycle

A stationary bicycle is usually a special-purpose exercise machine resembling a bicycle without true wheels, but it is also possible to adapt an ordinary bicycle for stationary exercise by placing it on bicycle rollers or a trainer. Rollers and trainers are often used by racing cyclists to warm up before racing, or to train on their own machines indoors.
History
The ancestors of modern stationary bicycles date back to the end of the eighteenth century. The Gymnasticon was an early example.