I think this poll is likely to be very biased - those proud of their habits are more likely to participate and comment. So far in this poll, it's saying that 72% of HNers work out "a few times a week" or more?
For example your bodies thermoregulation system has not evolved to understand clothing, so when its 0F out and you're snowshoeing if you sweat and soak your clothes you'll more or less promptly die of hypothermia, or at least its going to really suck. So do my couple mile snowshoe hikes count if I carefully never break a sweat? If I knock back 2+ miles walking after lunch and dinner (only takes 45 mins or so each time) is that real exercise or not? It adds up to a marathon or so every week, its not like I'm only walking to the vending machine or something.