Riding a bike is commonly ušed for individual recreation and during a rehabilitation treatment. However, we háve found an incorrect posture in the area of cervical spině. Also cycling for tne purpose of a high performance does not always háve to put optimum load on locomotion organs of a human being. Movement of lower extremities does not háve to correspond to the human congenital locomotor programme. The basis of our approach is to find puncta fixa on a bike saddle and handlebars and puncta mobile distally on pedals. Lower extremities work as a power generátor. Therefore riding a bike is not a natural human locomotion. When riding in a standing position we háve found a required higher activity of m. gluteus maximus

        Key words: riding a bicycle, locomotor activity, rehabilitation treatment of joints