I’m a working mother; how can I maximize my 3 workouts per week?

Since you’re presumably young, you should use almost all of your limited time getting aerobic exercise like running, biking, or brisk walking, said William J. Evans, director of the Nutrition, Metabolism, and Exercise Laboratory at the University of Arkansas for Medical Sciences. That’s because “regular aerobic exercise increases life expectancy by decreasing the risk of a host of chronic diseases,” he added in an e-mail.