Here's a quote I came across in Natalie Angier's fascinating book, Woman: An Intimate Geography, from which I could pull quotes for this blog for a month, it's so chock full of great insight.
"Men take strength for granted. Women have to fight for it. They have to trick themselves into their strength, or rather their strengths. Physical strength is but one allele of strength. There are all the other strengths: of self-conviction, of purpose, of being comfortable in your designated plasm. I don't know if physical strength can enhance those other, intangible strengths, if a better-braced body can give one ovarios of heart. It's a good gimmick, though, a place to start, or to return to when all else fails."
p.s. Ovarios = cojones
pps. Angier may not "know" if physical strength enhances our other strengths, but I'm going to go out on a limb here and say that I "know" and it does.