I got frustrated with my Fitbit recently when it recorded a gut-busting hour-long cross-training workout as "three very active minutes." If the Fitbit people are taking feature requests, I'd like to see an update that allows you to carefully fine-tune its definition of very active by telling it to eat a bag of dicks.
Anyway, this made me think how there are certain parenting activities that seem WAY more physically challenging than they actually are. Like if you bothered to enter them in a fitness/meal-tracking app, you'd probably learn that you burned the caloric equivalent of one slice of cucumber (no peel), but at the time, they feel as exhausting as running a marathon. Uphill. In the snow. Both ways.