Women should lift weights. How heavy? how many times a week? How many sets? How many reps? Why do I need to lift weights? Everyone and everybody should lift weights. It is important for so many reasons. One of the many reasons are as we age, and we are all aging, we lose muscle mass and bone density. So lift! Weights provide resistance to your muscles and that provides an increased metabolic demand. So you burn more calories for a longer period of time after you lift then wh