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From: tino@hou2f.UUCP (A.TINO)
Newsgroups: net.med
Subject: Re: exercise
Message-ID: <639@hou2f.UUCP>
Date: Fri, 14-Mar-86 10:35:32 EST
Article-I.D.: hou2f.639
Posted: Fri Mar 14 10:35:32 1986
Date-Received: Sat, 15-Mar-86 21:45:32 EST
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 23
Keywords: efficiency of energy conversion?


>In article <5079@alice.uUCp> ark@alice.UucP (Andrew Koenig) writes:
>>Is there an easy way to figure out how many calories are burned
>>by a given amount of exercise, given that I can actually measure
>>energy output?
>>
>>For example, suppose someone puts out 150 watts for 15 minutes.
>>How many calories of intake are necessary to produce that much
>>output?

In article <213@ttidcc.UUCP> Jerry Hollombe responds:
>Multiply watts by 9.481 * 10^-4 to obtain BTU/second.
>Multiply BTU by 2.520 * 10^-1 to obtain kg calories.

>Source: Pratt & Whitney Aeronautical Vest-Pocket Handbook

I think the point is: How many calories of food must be consumed
to maintain a given energy output, not how to convert from watt-minutes
to calories. The hard part is estimating the body's efficiency in 
converting food-energy into useful mechanical energy. Any guesses?
_______
Al Tino
..!hou2f!tino