In the ancient Greek Olympics, the pentathlon included a race the length of the stadium about 183 metres 200 yards, the long jump, the discus throw, the javelin throw, and a wrestling match between the two athletes who performed best in the previous four events.
The pentathlon was a combination of two types of events that existed in ancient world:
The light events: jumping, running and javelin.
Athletes used lead or stone jump weights halteres shaped like telephone receivers to increase the length of their jump. The halteres were held in front of the athlete during his ascent, and forcibly thrust behind his back and dropped during his descent to help propel his body further.
For running there were 4 types of races at Olympia. The stadion was the oldest event of the Games. Runners sprinted for 1 stade or the length of the stadium. The other races were a 2-stade race, and a long-distance run which ranged from 7 to 24 stades.
The javelin was a man-high length of wood, with either a sharpened end or an attached metal point. It had a thong for a hurler's fingers attached to its center of gravity, which increased the precision and distance of a javelin's flight.
The heavy events: discus and wrestling.
The discus was made of stone, iron, bronze, or lead, and was shaped like a flying saucer. Sizes varied, since the boys' division was not expected to throw the same weight as the mens.
Like the modern sport, an athlete needed to throw his opponent on the ground, landing on a hip, shoulder, or back for a fair fall. 3 throws were necessary to win a match. Biting was not allowed, and genital holds were also illegal. Attacks such as breaking your opponent's fingers were permitted.
This is the same like today because they have the same sports and they all have the same rules.