Given what we know now about health & fitness and how to train our bodies, what would a typical soldier have looked like in those times? Would his physical capabilities been enough for what was demanded on a battlefield?
Hi OP. It seems you're far from alone in wondering whether ancient and medieval warriors were as buff as modern athletes, body-builders and movie-stars. Similar questions have been answered by top quality contributors here:
See the ones by u/FraudianSlip and u/GBFel here https://www.reddit.com/r/AskHistorians/comments/10hjf9/movies_always_make_out_ancient_warriors_to_be/
u/PartyMoses here https://www.reddit.com/r/AskHistorians/comments/ceo5lm/what_would_the_physique_of_a_medieval_knight_have/
and u/Iphikrates here https://www.reddit.com/r/AskHistorians/comments/8bbgtc/how_should_we_imagine_an_ancient_spartan_soldiers/
I'll also notify our two resident experts on medieval military history, u/Rittermeister and u/Hergrim