The pentathlon or women's pentathlon is a combined track and field event in which each woman competes in five separate events over one day. The distance or time for each event is converted to points via scoring tables, with the overall ranking determined by total points. Since 1949 the events have been sprint hurdling, high jump, shot put, long jump, and a flat race. The sprint hurdles distance was 80 m outdoors until 1969 and thereafter 100 m; in indoor pentathlon the distance is 60 m. The flat race was 200 m until 1976 and thereafter 800 m. In elite-level outdoor competition, the pentathlon was superseded in 1981 by the heptathlon, which has seven events, with both 200 m and 800 m, as well as the javelin throw. Pentathlon is still contested at school and masters level and indoors.

The 100 metres hurdles, or 100-meter hurdles, is a track and field event run mainly by women. For the race, ten hurdles of a height of 33 inches (83.8 cm) are placed along a straight course of 100 metres (109.36 yd). The first hurdle is placed after a run-up of 13 metres from the starting line. The next 9 hurdles are set at a distance of 8.5 metres from each other, and the home stretch from the last hurdle to the finish line is 10.5 metres long. The hurdles are set up so that they will fall over if bumped into by the runner, but weighted so this is disadvantageous. Fallen hurdles do not count against runners provided that they do not run into them on purpose. Like the 100 metres sprint, the 100 m hurdles begins with athletes in starting blocks.