There are many benefits of strength training for women. Many women shy away from lifting heavy weight because they’re afraid they will bulk up and look like a man. The truth? Testosterone is the primary hormone involved in building muscle, and women have 15-20 times less testosterone than men. So, lifting weights won’t make a woman look “manly”. On the contrary, increasing lean muscle mass means increasing your metabolism! For every pound of muscle you gain, you burn an extra 50 calories at rest.