Huh?

[ellarien]

The USDA has a spiffy (if excruciatingly slow) new website to promote its new, rainbow-striped 'food pyramid'.

There's a handy tool to calculate your desirable calorie intake. It asks for

Amount of moderate or vigorous activity (such as brisk walking, jogging, biking, aerobics, or yard work) you do in addition to your normal daily routine, most days.

Huh?

So if you're already doing it as part of your routine, it doesn't count? How does that work?