Heptathlon vs. Decathlon: What's the Difference?

Heptathlon and Decathlon Definitions
Heptathlon
An athletic contest usually limited to women in which each contestant participates in the following seven track and field events
200-meter and 800-meter runs, 100-meter hurdles, shot put, javelin throw, high jump, and long jump.
Decathlon
An athletic contest consisting of ten track and field events
The 100-meter, 400-meter, and 1,500-meter runs.
The 110-meter high hurdles.
The discus and javelin throws.
The shot put.
The pole vault.
The high jump.
And the long jump. Participation in the decathlon is traditionally limited to men.
Heptathlon
(athletics) An athletic contest comprising seven events; contested mostly by women, for whom this is an Olympic sport.
Decathlon
An athletic contest consisting of ten events which includes sprinting, hurdling, jumping, and throwing over a span of two days.
Decathlon
A contest in science and math proving skill.
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Decathlon
In the modern Olympic Games, a composite contest consisting of a 100-meter run, a broad jump, putting the shot, a running high-jump, a 400-meter run, throwing the discus, a 100-meter hurdle race, pole vaulting, throwing the javelin, and a 1500-meter run.
Decathlon
An athletic contest consisting of ten different events