Old 07-25-06, 08:08 AM
  #5  
CdCf
Videre non videri
 
Join Date: Sep 2004
Location: Gothenburg, Sweden
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Bikes: 1 road bike (simple, light), 1 TT bike (could be more aero, could be lighter), 1 all-weather commuter and winter bike, 1 Monark 828E ergometer indoor bike

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Yes, it's probably accurate. The reason is that your body is only about 20% efficient at cycling. That is, to put out 200 W of useful power (useful = used to move yourself and your bike forward), your body has to work at a power level five times that, or 1000 W in this case. Your 1450 W, divided by five, comes to a decent 290 W. The power not going into your pedals produces heat in your body.

However, since you used a piece of exercise equipment, it's designed to tell you how much energy you used during your workout, and that has to be done using your total power output. It probably knows the power required for every RPM/load combination and multiplies that number by five.
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