Did greek Olympians wear clothes

Answer 1

The ancient Olympics were rather different from the modern Games. For one thing, only free men who spoke Greek could compete so there would not have been a standard apparel for women taking part- because they didn't. Standard apparel for the men was au naturel (nekkid as a jaybird). The Greek tradition of athletic nudity was introduced in 720 BC, either by the Spartans or by the Megarian Orsippus, and this was adopted early in the Olympics as well.

Note - there is an account of a woman named Bilistiche, a Hellenistic courtesan who was reported to have won the tethrippon and synoris horse races in the 264 BC Olympic Games. That appears to have been the only reported instance of a woman participating in the games. Since she was a courtesan it is plausible that she followed the Olympic tradition of competing naked, but no one who reported on it took time to mention anything about it. More likely she wore clothing appropriate to horse riding to protect against chafing etc. and something functionally equivalent to a sports bra to control excessive "bounce".