Quoted post said:Originally Posted by daveryanwyoming [IMG]/img/forum/go_quote.gif[/IMG]
There's a few approaches you can try:
- Do a MAP test and estimate your FTP as somewhere in the range of 72-77% of MAP per Ric Stern's guidelines: http://www.cyclecoach.com/index.php?option=com_content&view=article&id=70&Itemid=112 I'd recommend the non-elite ramp rate of 25 watts per minute unless you happen to be a national class rider.
- Do some long Threshold training intervals in the 20 - 30 minute range starting at a level you think you can complete and increment or decrement the level as necessary for subsequent intervals and over subsequent days. So for instance maybe do one at 200 watts or 250 watts or whatever you have reason to believe you can hold for 20+ minutes. Adjust as necessary based on whether you blow before finishing the effort or feel like you could easily have done more. It'll probably take several sessions over maybe a week or two to dial in the best power level but it's a very good way to find out what you can actually do during regular Threshold training intervals and a good way to estimate FTP. If you use another testing method you'll still end up following some version of this trial and error procedure to do your actual training as fitness levels change over time and the power levels aren't set in stone.
- Do a slow ramp starting at what you expect to be Tempo power, incrementing in say 10 watt steps every five minutes or so. You'll narrow down the range of your FTP very quickly as you go from what feels easily sustainable for long periods to what you can't even sustain for five minutes. Subsequent 'tests' can narrow this range further but it'll tell you very quickly what's easy, what's moderate, and what's just not going to happen without further training.
Regardless of the method you use, it's likely that your indoor and outdoor power numbers will differ but since your not training outdoors with a power meter you won't know for certain and to some extent it doesn't matter. Just do the work at the best hard but sustainable intensity you can manage do enough of this kind of work, get enough recovery between hard sessions and fuel yourself well and progress will come.
Here's some good reading on ways to estimate FTP that can be applied to your trainer scenario:
http://alex-cycle.blogspot.com/2008/05/seven-deadly-sins.html
http://alex-cycle.blogspot.com/2009/07/sins-of-sins-testing-ftp-2.html
But the bottom line is that it's not always easy nor necessary to do a carefully structured 'test' to determine FTP. Figuring out your sustainable power and FTP via trial and error at sucessively higher power levels over time is a very pragmatic approach and in the end what most folks end up doing as their fitness changes over time. You don't need an exact FTP number to guide training, you just need to do good solid quality work at near your best possible intensity for the chosen durations but backed off enough to be able to finish the intervals, finish the sessions, and to recovery well enough mentally and physically to train on subsequent days. Whether you do this on an ergometer that controls power levels or a fixed resistance mode trainer where you control power through cadence and gearing isn't really that important as long as you understand an exact FTP number doesn't have to fall out of a single dedicated test.
-Dave
+1 on this
I just asked a similar question on the wattage list and as a noob, I am enjoying the trial and error method (though I got a few "just run the test" emails). There are also aspects that I like a lot better, in the sense that if you have a bad day, your ranges are shot and 20 minutes is a long interval on the trainer to me. I need distraction. But I'm also a noob.
Using a guesstimate combined with HR plus PE, I just ran an SST workout, and based on what the time in zone histogram on GC looked like (a pyramid with the peak on the line between tempo and L4), I think I am within 10 watts or so. The it's killing me thread was also a really big help (and damned inspirational). And besides, it seems to me that pacing is the key to the 20 minute interval, which being new to power I could only learn by looking at numbers from earlier rides to get an idea of where I will have to target my efforts. I eventually will test it once I roll outside, but I have now begun to see how I could train with a power meter all winter, target FTP, and never do any formal "testing". Or, put another way, if training is testing and testing is training, you pretty much get results every time.
You would not take a first grader and make them take a 3 hour final that determines their semester grades. It's the difference between getting grades based on a final, and based on a series of weekly quizzes with a couple of midterms through the course of the semester. The quizzes better prepare you for taking midterms. And midterms prepare you for finals.