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Power Zones

Old 01-20-11, 08:25 PM
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Power Zones

I use a power tap hub, a joule 2.0 and power agent software. My FTP is 286, the power agent software calculated my power zones but the lower zones seem to be very wide while the upper zones are very narrow.

Recovery 0 -121
Endurance 122 -241
Threshold 242 - 269
Race Pace 270 - 297
Max 298 - 325
Supra Max 326 - 3000

Looking at Allen/Coggan book

1 <55% of FTP 0 - 157
2 56 - 75% 157 - 214
3 76 - 90% 215 - 257
4 91 - 105% 258 - 300
5 106 - 120% 301 - 343
6 121 - 150% 344 - 429

Should I manually change these numbers in power agent and update the Joule?
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Old 01-21-11, 11:32 AM
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Most people consider the Coggan power zones to be "the bible", and so when you hear people talking about workouts in specific zones, they will most likely be basing those zones on the Allen/Coggan book. If you are doing workouts prescribed by someone who uses a different scale, then you will want to match your zones to that scale. If you aren't sure, I'd go with Coggan. I'm awaiting delivery of my first power meter, and everyone I've talked with uses the Coggan zones. One advantage of that, is that both Allen and Coggan are active in cycling training communities, and you can get answer to questions.

There are different heart rate zone scales as well. I was using Friel's zones until I got a coach who used different zones, and so I switched to match her guidelines.
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Old 01-21-11, 12:05 PM
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^ True, that.

Upper zones are always narrower, because the physiological effects that you're after occur within a narrower range.
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