Resistance Training is Not Just a Guys' Club
A new study from University of New South Wales has pulled together 30 different studies on resistance training and has found that women have the same relative gains in strength than men after the age of 50!
Previous research confused this be calculating "Absolute" gains - they didn't take into account that women are smaller and have less capacity for strength than men.
Why do post-menopausal women see such a big decrease in muscle mass?
Estrogen. A study from Finland measured a direct relationship between decrease estrogen and muscle mass over the transition from peri-menopause to post-menopause (from 6 months to 18 months). They measured a 1% decrease in muscle.