 Track and field events are divided into three broad categories : track events , field events , and combined events . The majority of athletes tend to <unk> in just one event ( or event type ) with the aim of <unk> their performances , although the aim of combined events athletes is to become proficient in a number of disciplines . Track events involve running on a track over a specified distances and — in the case of the hurdling and steeplechase events — obstacles may be placed on the track . There are also relay races in which teams of athletes run and pass on a baton to their team member at the end of a certain distance . 
