Kristen Seibert, an orthopedic surgeon at the University Hospital Hamburg-Eppendorf, said: "Sitting on a bicycle is usually due to personal taste, but there are several other factors that determine the correct position of the back and other body parts while riding a bicycle."
These include, for example, diseases that one may experience.If the seat is too low, it can irritate the joints of people with hip arthritis, because increased curvature results in compression of the femoral head in the right cavity. They have back problems that shouldn't bend too much when riding a bicycle.
In addition, the type of bike also affects the proper position of the body, where the way to sit on mountain bikes is different from models for racing or walking in cities, and advised the German doctor: «Ideally the upper body and arms should be a 90 degree angle». This position reduces the load from the shoulders.