This calculation is not exactly scientific, but : if U.S. women were an inch shorter then, that would make them 63 inches tall, instead of 64 inches (5'4). Thi

This calculation is not exactly scientific, but : if U.S. women were an inch shorter then, that would make them 63 inches tall, instead of 64 inches (5'4). This equates to a 1.6% increase in height. If we assume that they have grown proportionally in all directions, we cube it, to get roughly a 5% increase in volume (which I will assume leads to a 5% increase in weight). The increase in weight of women was a lot more than this, roughly 18%, so it seems to me this is not the important factor.