Your Fittest Year Starts Here!

This customizable new-year-new-you shape-up guide will ensure you make a head-turning comeback—no matter what got you off track

Comeback Conundrum: You recently had a baby

Intense exercise is usually off-limits for six weeks postpartum. After that, sheer exhaustion can keep moms couched.

Training Tip: Even if you're wiped, pop in a DVD or slip your baby in the stroller for a brisk walk. It will boost your energy and help you sleep better, says Michael Mantell, Ph.D., senior fitness consultant for behavioral sciences for the American Council on Exercise. "And in the long term, exercising will fend off postpartum depression."

Mental Trick: Mentally commit to just five to 10 minutes of exercise. If you don't feel energized after that time period has elapsed, try again later or take the day off and try again tomorrow. (Are you looking for a fast workout? Here’s how to Tone Your Arms in 15 Minutes.)