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Old 02-06-2013, 08:00 PM   #63
Join Date: Jun 2004
Posts: 7,038

A man burns about 100 calories per mile walking (flat surface). I've burned over 2000 calories practicing tennis in a couple of hours (basket of balls, so no stopping even to pick up balls). That would be about a 20 mile walk. I don't think 20 mile walks are very time efficient.
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