Yes! I get extremely tired when I walk in a museum as I need to look at things. At the end of the day I am extremely exhausted but if I look at the "mileage" it

Yes! I get extremely tired when I walk in a museum as I need to look at things. At the end of the day I am extremely exhausted but if I look at the "mileage" it is very low. I wonder if there's a more scientifically sound explanation for this phenomenon