Not sure if the Apple watches do the same, but the Garmin watches have a "Move!" reminder plus easy-to-configure step and stair goals, and make your progress obvious. I'm guessing it's more due to those types of little pokes throughout the day than parent actually forgetting to hit the gym every morning.
AW does this if you don't stand up within an hour, it pokes you to stand up and move around. It also sends you progress updates throughout the day of how much you've walked/moved/etc.
