Yeah. demonstration: an English historian ran the same 200 meter distance that the hoplites ran at Marathon in full panoply and demonstrated that a fit man could do it without tiring. These men (in the dosidataskeli) are the fittest of the fit (except maybe some Hellenic dudes in the Olympics) and very powerful men picked because they can fight in such heavy armour.

Its not so much the weight as the great design of the armour, fish scales and chain. One stops spears, etc well and the other provides cushioning and strong protection against most stuff but piercing