Well…. I think there is ample evidence in ancient Greek & Roman sculpture to suggest that the male physique has been developed, adored and worshiped for a very long time. Below are just three examples:The Barberini Faun
: The sculpture was either carved by an unknown Hellenistic sculptor of the Pergamene school, in the late third or early second century BCE or is a Roman copy of high quality, though its present form was given it by a series of restorers in Rome… The statue was found in the 1620s in the moat below the Castel Sant'Angelo … The historian Procopius recorded that during the siege of Rome in 537 the defenders had hurled down upon the Goths the statues adorning Hadrian's Mausoleum, and Johann Winckelmann speculated that the place of discovery and the statue's condition suggested that it had been such a projectileThe Dying Gaul
: Also called The Dying Galatian[ (in Italian: Galata Morente) or The Dying Gladiator — is an ancient Roman marble copy of a lost Hellenistic sculpture thought to have been executed in bronze. It may have been commissioned some time between 230 and 220 BC … The identity of the sculptor of the original is unknown ...Laocoön and His Sons
: also called the Laocoön Group, has been one of the most famous ancient sculptures ever since it was excavated in Rome in 1506 and placed on public display in the Vatican, where it remains. Exceptionally, it appears to be identifiable with a statue praised in the highest terms by the main Roman writer on art, Pliny the Elder. The figures are near life-size and the group is a little over 2 m (6 ft 7 in) in height, showing the Trojan priest Laocoön and his sons Antiphantes and Thymbraeus being attacked by sea serpents. … Various dates have been suggested for the statue, ranging from about 200 BC to the 70s AD, though "a Julio-Claudian date [between 27 BC and 68 AD] ... is now preferred".