our way of not feel guilty for over-eating on vacation is to, never take an elevator, and always walk 10,000 steps per day which works out to around 5 miles... with time to kill and sights to see, much easier then it sounds... this time we spent a little time and not much cash researching walking/fitness shoes... these are a clone of $250. fitness shoes (by MTD, I think that's the name)... the idea is your walking on a curved foam pad that is not stable, just the opposite of the usual walking shoe... the idea being you are now working more leg muscle to stay upright and walk in a straight line... they are not for the over weight or elderly unless you're fit.. they actually take a bit of getting used to but are comfortable and priced reasonable although they seem to run about  size small, but your results may vary... we got his and her and they may be hard to find, as they seem to be very popular...