A reader asks why treadmill walking seems so much harder than walking around the block.
from Well http://well.blogs.nytimes.com/2015/02/02/ask-well-the-drudgery-of-treadmills/
from Well http://well.blogs.nytimes.com/2015/02/02/ask-well-the-drudgery-of-treadmills/
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