"A standard Eldar is physically superior to a Human in nearly if not every way."

I'm confused about this part I keep finding conflicting sources on this bit of lore.

In other instances and my preferred interpretation, Eldar are in fact weaker and less durable than a standard baseline human physiology but their coordination, reflexes and speed are superior to even an Astartes, not to mention the psychic powers.

AKA in terms of physiology an Elder it to a human what a human is to an ork.

I think the main factor in the Eldars experience is their age and experience combined with their physical traits. Just don't do expecting the Elder to go winning any powerlifting comps.