Automatic watches have a rotor that can heavily strain the axles during sporting activity; they are therefore basically more sensitive than quartz watches or hand-wound watches. For everyday use, however, they are sufficiently robust. Regular wearing or occasional winding is important so that the oil does not gum up; professional servicing with cleaning and oiling is recommended after several years. Anyone wanting to save costs can check authorised repair centres abroad. For sporting activities, a quartz watch is more advisable.