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newb power measurement question

Old 07-15-08, 05:17 AM
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AngryScientist 
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newb power measurement question

i've done a search on the topic, but didnt find much directly related information.

Is there any empirical method to calculate power output based on more accessible values?

i would like to start training more seriously, but all (most) of the more recent training material contains VO2 and power output and the like.

maybe this is a confusining post / question, but i'm after the cheapest way to figure out my power output to at least baseline myself. any thoughts?
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Old 07-15-08, 05:49 AM
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http://en.wikipedia.org/wiki/Power_%28physics%29
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Old 07-15-08, 05:50 AM
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You can always do the free thing -- go to http://www.analyticcycling.com/ and get a pretty good idea of how much power you're putting out for various scenarios.
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Old 07-15-08, 06:00 AM
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Cheapest is an I-bike. You'll get different opinions on whether its accurate enough,and consistent enough to be a useful trainign tool.

Trying to back calculate it using an on line calculater jsut has toomany variables to be a useful training tool. Your better off just using a heart rate monitor.
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Old 07-15-08, 08:26 AM
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The stationary bikes @ my physical therapy place have power output.
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Old 07-15-08, 09:09 AM
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You need to forget about power, and try to refine your rate of perceived exertion (RPE). For training in a given zone, RPE is a fine tool. You can't do the analysis on relative strengths and weaknesses, but you should be able to pay close attention to race outcomes and perform adequate analysis on race limiters.

Read this page carefully, and internalize the perceived exertion values and the power level descriptions. They are very accurate. http://www.cyclingpeakssoftware.com/power411/levels.asp

One way I fine-tuned my RPE was to teach myself to do negative splits on hill repeats, so each one was faster than the previous. At first, my only successfully negative days had broad time ranges, with as much as 40 seconds on a ~5 minute climb between the first and the las. Once I refined my RPE, I was able to acheive negative splits with only 1 or 2 seconds improvement between repeats, and the last one leaving me completely gassed, and on the edge of failure.

Eventually, I got to the point that I could ride next to a rider I was coaching on a hill repeat, then reproduce that exact effort for them on the next repeat to help them pace negative splits. A couple of my charges said that it was like I had recorded their ability somehow and was playing it back through my legs.

RPE is a valuable tool.
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Old 07-15-08, 09:12 AM
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Originally Posted by gr@sshopper View Post
The stationary bikes @ my physical therapy place have power output.
Those are rarely accurate or precise.
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Old 07-15-08, 09:17 AM
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Originally Posted by waterrockets View Post
You need to forget about power, and try to refine your rate of perceived exertion (RPE). For training in a given zone, RPE is a fine tool. You can't do the analysis on relative strengths and weaknesses, but you should be able to pay close attention to race outcomes and perform adequate analysis on race limiters.

Read this page carefully, and internalize the perceived exertion values and the power level descriptions. They are very accurate. http://www.cyclingpeakssoftware.com/power411/levels.asp

One way I fine-tuned my RPE was to teach myself to do negative splits on hill repeats, so each one was faster than the previous. At first, my only successfully negative days had broad time ranges, with as much as 40 seconds on a ~5 minute climb between the first and the las. Once I refined my RPE, I was able to acheive negative splits with only 1 or 2 seconds improvement between repeats, and the last one leaving me completely gassed, and on the edge of failure.

Eventually, I got to the point that I could ride next to a rider I was coaching on a hill repeat, then reproduce that exact effort for them on the next repeat to help them pace negative splits. A couple of my charges said that it was like I had recorded their ability somehow and was playing it back through my legs.

RPE is a valuable tool.
Based on WR advice in an earlier thread, I have worked much more carefully to negative split my hill repeats. I find that the training there has led to better observation of my RPE in other settings. I have my hill repeats down now where the last one is usually the fastest. In addition, all of my efforts are now much faster than my full blown efforts used to be before I did better structuring of my training.

In other words, listen to WR, then do a search on the forums for WRI to see how many others follow at least some of his training advice.

Oh yeah -- I only use a HR monitor.
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Old 07-15-08, 10:25 AM
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Originally Posted by bdcheung View Post
Those are rarely accurate or precise.
Indeed. they are, however, cheap.
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