"A strong upper body is so important for new moms," says Kristin McGee, a personal trainer in New York City. "Think about all that gear you have to schlep for Baby!" (She should know: That's her son, Timothy, below!) Have the green light to exercise from your M.D.? Do McGee's mommy-and-me workout one time through, three days a week. Then step it up to two times through at each session for best results.
