Gymnasium

Gymnasium (pronounced jim-ney-zee-uhm)

(1) A building or room designed and equipped for indoor sports, exercise and physical training or education.

(2) A public place or building where Ancient Greek youth took exercise, equipped with running and wrestling grounds, baths, and halls for discussions and lectures.

(3) In continental Europe (and most common in Germany) a classical school providing education for those preparing for university (often initial capital letter).

1590-1600: From the Latin gymnasium, from the Ancient Greek γυμνάσιον (gumnásion, from gumnazein) (exercise; school), from γυμνός (gumnós) (naked), the connection owed to the tradition in Antiquity of Greek athletes training (and sometimes competing) naked.  The use in the German education system (as the noun Gymnasium) dated from the mid fifteenth century, the spelling in Hungarian being gimnázium, in Lower Sorbian gymnazium and in Polish gimnazjum.  The plural form in German is Gymnasien.  In English, gymnasium was adopted with the meaning “a place of exercise”, reflecting the Latin gymnasium (school for gymnastics) and the Ancient Greek gymnasion (public place where athletic exercises are practiced; gymnastics school).  The familiar modern clipping (gym) was in use by 1871 as US student slang and is now almost universal in both conversational use and commerce.  The adjective gymnastics (of or pertaining to athletic exercise) actually predated the noun, noted as early as the 1570s and was from the Latin gymnasticus, from the Ancient Greek gymnastikos (fond of or skilled in bodily exercise), from gymnazein (to exercise or train).  Gymnasium, gymnast & gymnastics are nouns, & gymnastic is a noun & adjective, gymnasial & gymnastical are adjectives and gymnastically is an adverb; the noun plural is gymnasia or (the more common) gymnasiums although the most commonly used plural form is gymnastics.

Lindsay Lohan: Gymnastics in the gymnasium.

Although historians have relied on deductive reasoning rather than documentary evidence in tracing the structural evolution of urban spaces in Ancient Greek (certainly prior to the classical era), it’s thought the original gymnasiums were something like an open sports field, a place devoted to youth exercising and training for sports and combat.  As the education systems developed, school building began to be added in places close to the gymnasium and in the way words in language develop associatively, the area as a whole came to be the gumnásion, physical training being thought just one aspect of the curriculum.  In the German states, from the mid fifteenth century, the name was adopted for high schools (emulating the use in Latin), institutions then something of a novelty and the nod to the Classical world reflected the veneration for the era (or at least an idealized construct of it) which was a feature of the Renaissance.  In English, the use has always been restricted to a sub-set (ie certain (usually indoor) events) of athletics although in the nineteenth century, gymnastical was used as adjective (of or relating to schools) and a gymnasiast was a student at such an institution.  The legend is the Greeks held that men training and competing in a state of nakedness was good for body and soul, but the archaeological evidence seems to suggest the many paintings of the events (with the athletes always depicted at an angle which permitted some modesty to be preserved) were a product of the Renaissance imagination.  This is unsurprising because so much of the art and historiography of Antiquity created as the West "discovered" the Classical world was an idealized version, reflecting the veneration in which the era was held.

Early activewear: Sala delle Dieci Ragazze (Room of the Ten Girls), a first century AD mosaic in Villa Romana del Casale, Sicily.  For whatever reason, it was a later addition, added atop what's thought to be a conventional geometric mosaic.  

What the men seem usually to have worn was a kynodesme, a learned borrowing from the Ancient Greek κυνοδέσμη (kunodésmē) (literally “dog tie”) which was a thin leather strip which served to restrain the foreskin, this preventing exposure of the glans, something which would have made the sporting activities easier to perform by limiting intrusive (and even painful) movement.  For the same reason, women competing in their own events wore a type of bra, depicted in surviving contemporary art in a style which would now be called a bandeau.  So, it's probably a myth that in the ancient Olympic Games (τὰ Ὀλύμπια) (ta Olympia; held at four year intervals at the sanctuary of Zeus in Olympia) the athletes were naked (although doubtlessly it was common during training) and definitely a myth the bra was invented in the late nineteenth century.  To the west there was later pragmatism.  Although the public schools of England were much taken with the classics and took especially to sporting competitions, the alleged tradition never caught on the playing fields of England where it tends to be colder than the Mediterranean.

Lindsay Lohan in the gym, Planet Fitness Super Bowl Commercial, 2022.