Dr. Stephanie Estima reveals why women pursuing extreme thinness often end up with bone disease, how 97-98% of women lack hormones to bulk from lifting, and which five muscle groups create the hourglass figure. A practical guide dismantling diet myths and perimenopause training strategies for women 40+. Pursuing extreme thinness causes bone loss, hormonal dysfunction, and metabolic damage; building muscle and bone density creates a stronger, healthier body than chasing a low number on the scale.