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Science News, August 18, 2007 by David B. Thomas
I would debate the "1,000 watts or more" value attributed to typical adults during strenuous exercise ("Powering the Revolution: Tiny gadgets pick up energy for free, SN." 6/2/07, p. 344). Hiking up steep slopes, I rarely exceed 250 W myself, and typical hikers are going much slower. The 1,000-watt figure can only apply to elite athletes during brief periods of peak exertion.
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