[quote=So Boerd]
In the case of Robert Wadlow, tallest man ever, cartilage and circulation was at issue. As height increases, distance blood must travel increases twofold, thus Work done by the heart increases by twice the amount height increases.
[/quote]

That's a human, it's rather irrelevant considering we are talking about a non-human species with different bone-structure and muscle mass. Take it up with Raptor in PM, though, this is hardly the place to argue over what species can do what.