In his aphorisms Hippocrates bears witness to the dangers of over-exercise and superabundant training, and Galen is particularly averse to an art which so preternaturally develops the constitution and nature of man; many subsequent medical authorities believed that excessive development of the human frame was necessarily followed by a compensatory shortening of life.
The foot-race was the oldest of the Greek institutions, and in the first of the Olympiads the "dromos," a course of about 200 yards, was the only contest; but gradually the "dialos," in which the course was double that of the dromos, was introduced, and, finally, tests of endurance as well as speed were instituted in the long-distance races and the contests of racing in heavy armor, which were so highly commended by Plato as preparation for the arduous duties of a soldier.
Among the Greeks we read of Lasthenes the Theban, who vanquished a horse in the course; of Polymnestor, who chased and caught a hare; and Philonides, the courier of Alexander the Great, who in nine hours traversed the distance between the Greek cities Sicyone and Elis, a distance of over 150 miles.

We read of the famous soldier of Marathon, who ran to announce the victory to the Magistrates of Athens and fell dead at their feet.

In the Olympian games at Athens in 1896 this distance (about 26 miles) was traversed in less than three hours.
It is said of Euchidas, who carried the fire necessary for the sacrifices which were to replace those which the Persians had spoiled, that he ran a thousand stadia (about 125 miles) and fell dead at the end of his mission.

The Roman historians have also recited the extraordinary feats of the couriers of their times.

Pliny speaks of an athlete who ran 235 kilometers (almost 150 miles) without once stopping.