I don't notice much difference in my walking during periods of daily riding versus occasional riding since NYC is a walking city and I walk a lot regardless (I don't own a car). However, after a century ride or a multi-day tour such as a camping trip I get the sensation of constant forward motion when I get off the bike and for quite some time afterward. And I dream about riding, too, usually waking up just before crashing into something--not unlike catching yourself "falling". Stairs are hard after that much riding, though not ascending, but rather descending.