The heptathlon is an event for women.
There are seven events in the heptathlon.
The events happen over two days.
There are four events on day one and three events on day two.
An athlete who competes in the heptathlon is called a heptathlete.
The word 'heptathlon' comes from two Greek words: hepta (seven) and athlon (contest). In 1984, javelin throw and an 800 metre run were added to the women's pentathlon and it became the heptathlon
The first day begins with a one hundred metre hurdles race. The heptathletes run, jumping over a number of hurdles as they go.
This is followed by a discus throw.
The next event is the high jump. The athletes run, taking big steps, and then jump as high as they can to try and get over a bar that is placed very high, balanced on two poles. The athletes curl over the bar without bumping it and land on a special landing mat.
The the javelin throw is next.
The last event of the day is a 200 metre run.
The second day begins with the long jump. The athletes run along a runway to a take off board, and jump. They stretch their arms and legs as they try to get as far as they can. They land in sand.
The shot put is next. The athletes hold a metal ball, called a shot, resting against their shoulder. They turn in a circle marked on the ground, crouch and push the shot as hard as they can. It goes through the air and lands on the ground. Judges measure how far it has travelled.
The heptathlon finishes with an 800 metre run, which is twice around the track.