ScienceDaily (July 1, 2008) — The modern Olympic ideals differ dramatically from the way the games were actually played in ancient Greece, says a University of Maryland classicist who has heavily researched the Olympic past. The ancient games featured professionals with a “winning is everything” philosophy.
Neat little comparison of modering day Olympics to the original...although disagree that today's "ideals" differ dramaticly. This was especially amusing with ancient world 'steroids':

Ancient athletes resorted to various “potions” to gain a competitive edge. “The dung of a wild boar was honored for the powers it conferred on charioteers,” Lee points out. “Even the emperor Nero tried it.”