I was thinking about skating, and trying to decide whether it's more complex or less. Mechanically, it is much simpler, despite the trickier balance problem. I think. You certainly don't spend as much time falling when skating as opposed to walking. (Though I'll concede that when you do fall while skating, you notice it more, since most people aren't aware of the falling portion of a walking step until somebody else points it out.) But I haven't spent as much time really analyzing what my knees and ankles are doing when skating, so I hesitate to state a very strong position on the matter.
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