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Old 01-08-06, 09:04 PM   #1
cnudell
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Calculated Power Output

Can power output be calculated based on HR, Speed, terain or a Power Meater is a MUST to get these numbers?
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Old 01-08-06, 09:28 PM   #2
danch
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It _can_ be calculated based on speed and terrain. Here's an online calculator http://www.kreuzotter.de/english/espeed.htm.

Bear in mind that the calculation is only as accurate as the numbers you give it, and that some of the numbers are nigh-impossible for a normal person to be accurate with (frontal area, coefficient of drag, wind speed...) but it can get you into the ballpark.
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Old 01-08-06, 11:35 PM   #3
WarrenG
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www.analyticcycling.com has the online tools to calculate power too.

Even a 3mph wind makes a difference in power. Some people will do an out and back test to help account for slope and wind.

-Warren
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