A beautiful thing happens around your infant's 6-month birthday — he or she starts settling into a regular routine. It's not foolproof, but take advantage of knowing when your tot will be snoozing. Nap time is the perfect time to pop in a workout video, do lunges, squats, and crunches. Supermotivated moms can take advantage of knowing what time their babe wakes and squeezing in a workout before baby even opens his eyes.
Source: Flickr user joe shlabotnik