The difference has gotten bigger since the body armor.
Between that and the gear and the heat,
it's hard for any soldier to get around, even the guys.
Impossible for most women.
The nature of combat has to change. Military research is on it. Here's a really cool thing:http://phys.org/news/2011-10-boston-dynamics-unwraps-military-robot.html
Carries 400 lbs up to 20 miles.
I saw a video of it climbing up rocks and
being kicked and recovering on ice.
It would go along, and then do resupply, and
eventually, evac. the wounded.
Asymmetric war really messes up the old order.
RPGs and IEDs...etc.