If the goal is to lose weight and shape up, it may be better to spend more time lifting weights and less time on the treadmill. Many women are changing their approach on how are working out. Build up the muscles and burm calories more efficiently. 

“They bypass weightlifting because of this fear, which is misinformed,” Williams says. “Traditional lifting won’t bulk you up. It’s hard for women to get bulky. Ninety-nine percent of us don’t have the testosterone needed for that.”