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Fatigue Profile and How it Applies to Racing

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Fatigue Profile and How it Applies to Racing

Old 05-11-10, 12:58 PM
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Nate552
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Fatigue Profile and How it Applies to Racing

I've been reading Training and Racing with a Power Meter 2nd edition the past few days and a new concept they introduced is the Fatigue Profile. Essentially you are comparing your power percentage drop off in certain muscular groups, Neuromuscular, Anaerobic, VO2Max, and Lactate Threshold. Then you compare your percentage drop to their categories to their categories of average, below average, etc. Then you can determine some more specifics about what kind of sprinter you are, etc. I haven't done all of the specific tests, like an 8 minute test, or 20 sec, but I just cherry picked my data from this season to get an idea of my Fatigue Profile. Having never done a 60 or 90 minute test my Lactate Numbers were poor. (I removed actual watt numbers so this doesn't turn into a contest)
percentage drop example: (5sec power - 10 sec power) / 5 sec power = 10 sec % drop

Neuromuscular
5 sec 100%
10 sec 21.1% Above Avg
20 sec 33.9% Above Avg

Anaerobic
30 sec 100%
1 min 22.2% Avg
2 min 44.2% Avg

VO2 Max
3 min 100%
5 min 10.6% Avg
8 min 26.3% Below Avg

Lactate Threshold
20 min 100%
60 min 13.3% Below Avg
90 min 26.6% Below Avg --Seriously? A 90 minute test?



Based on this, my 20-30 second sprint is pretty good, fatigue wise, and my 5- 8 min is bad. So, sprint 20-30 seconds from the line, and don't attack at 1K to go. In other words, I'm no Waterrocket

Anyone do this and if so, how did it compare to your race strategies? Confirm it? Change it?
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Old 05-11-10, 01:19 PM
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I hadn't heard of this. Interesting. I'll have to check into it.
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Old 05-11-10, 01:31 PM
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how would you compare the 2nd edition to the 1st ed. book?
I have the 1st ed, but I'm about to get back into the power game after a few years out... saw the new book this morning, was wondering if the buy was worth it.
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Old 05-11-10, 01:35 PM
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Originally Posted by Hida Yanra View Post
how would you compare the 2nd edition to the 1st ed. book?
I have the 1st ed, but I'm about to get back into the power game after a few years out... saw the new book this morning, was wondering if the buy was worth it.
I haven't read it all, just some of the new parts. It seems to have more workouts and plans and more info on the performance manager.

Here is a brief overview of what's new
http://www.trijuice.com/2010/05/cycl...ower_meter.htm
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Old 05-11-10, 02:43 PM
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What are the average percentage drops in each category? Haven't been able to pick up the new edition yet.
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Old 05-11-10, 03:19 PM
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This was discussed a little on one of my coaching courses. The initial outcome of analysis from these tests was that it was a decent predictor of performance and a useful tool for assessment. Be interesting to read some more about it.
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Old 05-11-10, 03:44 PM
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Oh Lord, another metric with which to prove I suck....
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Old 05-11-10, 07:00 PM
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Here are mine:


Neuromuscular
5 sec 100%
10 sec 10.9% Well Above Avg (only because my 5 sec power is embarrassingly low)
20 sec 27.7% Above Avg

Anaerobic
30 sec 100%
1 min 15.1% Above Avg
2 min 30.0% Avg

VO2 Max
3 min 100%
5 min 11.1% Avg
8 min 16.8% Above Avg

Lactate Threshold
20 min 100%
60 min 11.1% Below Avg (haven't done a 40 k tt yet)
90 min 15.4% Below Avg

Not sure how to interpret this yet as I just got my book today.
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Old 05-11-10, 07:24 PM
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I think this says I should never wait till 100 meters to sprint ... no kidding! I should start around a minute or more out. I agree with this. I just have to make sure I get enough of a jump that I get no one sucking my wheel. I could maybe even go 8 minutes early. I agree again from my racing/group ride experience.
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Old 05-12-10, 12:18 AM
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Is this chart only available in the new book? I have the old book, I don't feel like buying the new one.
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Old 05-12-10, 10:20 AM
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I have a problem with the vocabulary. I thought that fatigue was something that you experience after being on the bike for an extended period of time. This just looks like another version of the Mean Maximal Power graph (maybe he called it "power profile"), except instead of the shape of the graph, we're looking at the percent decay values on that same graph.

I still think it's helpful, but it's not new.
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