The answer is no, you won’t. If your fear of looking bulky and masculine is keeping you away from lifting weights, you’ll be relieved to know that a woman’s body isn’t naturally able to build large muscles the way a man can. Women’s bodies simply don’t have the testosterone levels necessary for major muscle gains; in fact, men have 20 times or more the amount of testosterone in their bodies that women have. The more important thing to remember is that women lose muscle mass as they age. Strength training is the only way to rebuild muscle, keep a strong and tight body, and increase your metabolic rate.