 There are two types of field events : jumps , and throws . In jumping competitions , athletes are judged on either the length or height of their jumps . The performances of jumping events for distance are measured from a board or marker , and any athlete <unk> this mark is judged to have fouled . In the jumps for height , an athlete must clear their body over a crossbar without knocking the bar off the supporting standards . The majority of jumping events are unaided , although athletes propel themselves vertically with purpose @-@ built sticks in the pole vault . 
