>>Well, listening to music is not an issue because regardless of my ears bouncing up and down, the sound is still ok, but how can you read? I tired and I just can't get my eyes to jostle in the same rhythm as the printed page.
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>When I was about six, it was my duty to walk two blocks to buy newspaper. I got into practice of reading while walking back then, and it's not that hard.
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>But then, in those olden days, we used real streets for walking, not machines :).

And you probably weren't power-walking either. I can read during a leisurely stroll, but that's not the same thing.