How many disciplines does heptathlon consist of?

A heptathlon is a track and field combined events contest made up of seven events. The name derives from the Greek hepta. A competitor in a heptathlon is referred to as a heptathlete. There are two heptathlons – the women's heptathlon and the men's – composed of different events. The men's heptathlon is older and is held indoors, while the women's is held outdoors and was introduced in the 1980s, first appearing in the Olympics in 1984.