The female body, has not had to "Fight or run", on a daily basis, for quite some time now...since quite a while before men, stopped generally needing to "fight or run"...so, the female body, isnt quite as used to doing it, therefore, does it to a lesser extent.
Take two identical cars. One is a daily driver and regularlily nips here and there.
The other, gets used on Sundays, by an Octagenarian to go to church and back.
The octagenarians car, will not react in the same way, when floored as teh daily driver...simply because it is not used to it, and is clogged with crap...that is not too say that female bodies are full of crap (well some are!), but you see my point.