I think remaining standing while your body screams at you to lay down is probably just as unhealthy (in a reasonably fit individual). Remember that ancient humans wouldn't force themselves to keep moving if their survival wasn't at stake. And how many situations can you think of that would have you walking nonstop for an entire day?
In all of the universe there is only one person with your exact charateristics. Just like there is only one person with everybody else's characteristics. Effectively, your uniqueness makes you pretty average.