Training with a power meter
I've just ordered a 4iiii power meter from Merlin in hopes of streamlining/focusing any structured training during this lockdown period. Prior to this, I was out most days (commuting and leisure), and I would basically just ride. Nothing too structured or focused, other than increasingly longer rides targeted at my big ride of the year. With the lockdown, and all of my targeted rides cancelled or postponed, and long rides outside not the best of ideas at the minute, I signed up to Zwift and enrolled on their Build me Up 12 week training plan to keep me going and hopefully make me a stronger ride. I'm now in the second week of the plan, and decided to buy a power meter to help with it. My current set-up is a classic trainer with speed/cadence sensors and a HRM. When the power meter arrives, should I re-do the FTP test on Zwift?
Anything else I need to keep in mind while using it? Thanks |
There's a huge learning curve involved in training with power. Don't tackle it all at once.
Don't take another FTP test, that's very stressful on your body, and any good training plan applies stresses in measured doses. You'll be too fatigued to do the next workout properly. Trust the plan for now. |
Originally Posted by Seattle Forrest
(Post 21405703)
There's a huge learning curve involved in training with power. Don't tackle it all at once.
Don't take another FTP test, that's very stressful on your body, and any good training plan applies stresses in measured doses. You'll be too fatigued to do the next workout properly. Trust the plan for now. One could also simply substitute the CTS FTP test for any Z4 interval workout: https://trainright.com/cts-field-tes...-calculations/ If he's going to do this training plan by power, there's his learning curve right there. That's what I did, started using power right in the middle of a year-long training plan. |
Originally Posted by Carbonfiberboy
(Post 21405955)
Yeah, but what's he supposed to use for power zones? Those plans usually call everything out as % of FTP. He's probably been using HR zones, so that could be a starter. When one uses HR for setting interval effort levels, one always goes too hard to start with and then gradually levels down to sustainable or more probably a little below because of the harder earlier effort. So a good approach is to take a wild guess at FTP. So if the interval calls for 95% FTP (SS interval), try to ride at a steady power will will give you 95% of your LTHR at the end, and that'll be ~95% FTP. An all-out 1' interval might be 180% FTP, so if one is doing a 1' interval, go as hard as you can, see your average power, and calculate from that, ignoring HR.
One could also simply substitute the CTS FTP test for any Z4 interval workout: https://trainright.com/cts-field-tes...-calculations/ If he's going to do this training plan by power, there's his learning curve right there. That's what I did, started using power right in the middle of a year-long training plan. -scott i'll add that when out on the road i will need to use the HRM as a power proxy. with more use on zwift with power and heart rate i will have some good numbers to use as reference points. |
I just ordered a powermeter and an HRM this week. I've never had either one before. Any recommendations on reading material or other resources to get started? I ride outside this time of year if that makes any difference.
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Originally Posted by kingston
(Post 21406529)
I just ordered a powermeter and an HRM this week. I've never had either one before. Any recommendations on reading material or other resources to get started? I ride outside this time of year if that makes any difference.
|
Originally Posted by kingston
(Post 21406529)
I just ordered a powermeter and an HRM this week. I've never had either one before. Any recommendations on reading material or other resources to get started? I ride outside this time of year if that makes any difference.
More than you'd ever want to know. |
The most important research you can do is on the bike especially outdoors. Ride and watch what it does. As you get some miles on these gadgets, and especially hill miles, you'll figure it out The PM tracks training, i.e. effort. The HRM tracks the physiological cost of that effort, and also the cost of past efforts. The idea is that having more data will enable one to make better decisions about what to do in the moment as well as what to do in the future. That means you have to have someplace to upload your data, tabulate it, and use it to predict future results. I use TrainingPeaks Premium, there is other, similar software. It takes experience to figure all this out. You can't do it just by reading, you need a body of work on which to apply these tools. So figure out what software you want to use and start using it.
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Originally Posted by kingston
(Post 21406529)
I just ordered a powermeter and an HRM this week. I've never had either one before. Any recommendations on reading material or other resources to get started? I ride outside this time of year if that makes any difference.
Your computer should be able to show you power averaged over X seconds and that's more meaningful than instantaneous power. |
Originally Posted by Carbonfiberboy
(Post 21405955)
Yeah, but what's he supposed to use for power zones?
It's a good question, you make excellent points, but that's for down the line because (1) an FTP test is very hard and will fatigue him for several days, throwing off subsequent workouts and that's going to hurt the training more than starting with the wrong FTP number, and (2) because most people need to take the test a few times before they get the hang of it. Better to just adjust the FTP up or down based on if the intervals are too easy or hard - in the beginning while already into a training plan. I would say do the test sooner if not already following a plan. Good plan should include FTP tests every month or two (?) to measure progress anyway. |
Originally Posted by Seattle Forrest
(Post 21407880)
Whatever he's using now. He asked if he should redo the test, so he's got some number for now.
It's a good question, you make excellent points, but that's for down the line because (1) an FTP test is very hard and will fatigue him for several days, throwing off subsequent workouts and that's going to hurt the training more than starting with the wrong FTP number, and (2) because most people need to take the test a few times before they get the hang of it. Better to just adjust the FTP up or down based on if the intervals are too easy or hard - in the beginning while already into a training plan. I would say do the test sooner if not already following a plan. Good plan should include FTP tests every month or two (?) to measure progress anyway. |
I will chime in...….
I am no elite athlete, not even close. I have a power meter and its been awesome. Here was my PM training build up to get better. For the first 3 months I just rode like normal, getting used to the numbers, playing with it you know feeling it out. After 3 months I did a FTP test, the 20 minute one. Then about two weeks later or so I did the full hour version. I used those two tests to get a pretty close FTP I thought. Then I got a book......yep, used a darn ol book and put together a training plan off that. I would have to go find it, only used it that one season. Now I have a decent regiment and know what the data means and how to use it. Been an awesome tool. I am still no athlete but I am a much stronger rider than I was before a PM. I can't see not having one now. I can climb better now, and know when to go and when to whoa. It doesn't matter what power meter source you use, an actual PM on the bike or a trainer, as long as you measure with the same PM you will be able to track your progress. That is what's important. So yes, I would redo a FTP and use that only as a measurement. Zwift power measurement is actually pretty close if you compare but they are just a touch elevated I find comparted to my PM. And the best part IMO they are just so dang cool to measure your watts! |
Originally Posted by caloso
(Post 21407760)
More than you'd ever want to know.
|
Originally Posted by kingston
(Post 21408240)
I assume the second edition is good enough for someone just getting started?
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Originally Posted by caloso
(Post 21408471)
Hah. I’ve had it so long I didn’t even realize that there’s a newer version.
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Thanks. I'll wait to re-do the FTP test, and just keep following the training program as is.
|
Originally Posted by spelger
(Post 21406285)
i am certainly no expert but i agree with this. i am upside down compared to the OP. i had a PM only because i had a smart trainer, i just got a HRM. i could have used it as a proxy for power but there is nothing like having the real thing to guage your effort by. however you the OP measures FTP i would do it, he can always adjust as you say.
-scott i'll add that when out on the road i will need to use the HRM as a power proxy. with more use on zwift with power and heart rate i will have some good numbers to use as reference points. |
Originally Posted by Seattle Forrest
(Post 21409560)
FYI, heart rate can be a good proxy over the long term, but for short efforts it responds too slowly. The great thing about power data for short intervals is that it's immediate.
for sure!! HR can be a tool BUT you have to use such a large sample over long period of time to get a number. Your HR can change on a day to day basis on so many factors. I tired this approach at first before a PM and found it was hard to get solid consistent usable data. |
Originally Posted by Seattle Forrest
(Post 21409560)
FYI, heart rate can be a good proxy over the long term, but for short efforts it responds too slowly. The great thing about power data for short intervals is that it's immediate.
|
Originally Posted by Seattle Forrest
(Post 21409560)
FYI, heart rate can be a good proxy over the long term, but for short efforts it responds too slowly. The great thing about power data for short intervals is that it's immediate.
before i really started looking at the data i made the incorrect correlation that a rising heart rate indicated increased power output, not so according to the big circled data. the small oval is what i had expected every time (black == power, red == heart rate). and what is your definition of effort vs long effort? a small 15 second micro burst of power being a short effort? based on what i see below i would agree. https://cimg6.ibsrv.net/gimg/bikefor...e6307bf328.png |
Originally Posted by spelger
(Post 21409972)
i still have a lot to learn now that i am gathering data. below is from a zwift training i did a couple of days ago...
before i really started looking at the data i made the incorrect correlation that a rising heart rate indicated increased power output, not so according to the big circled data. the small oval is what i had expected every time (black == power, red == heart rate). and what is your definition of effort vs long effort? a small 15 second micro burst of power being a short effort? based on what i see below i would agree. https://cimg6.ibsrv.net/gimg/bikefor...e6307bf328.png |
Originally Posted by rivers
(Post 21405354)
I've just ordered a 4iiii power meter from Merlin in hopes of streamlining/focusing any structured training during this lockdown period. Prior to this, I was out most days (commuting and leisure), and I would basically just ride. Nothing too structured or focused, other than increasingly longer rides targeted at my big ride of the year. With the lockdown, and all of my targeted rides cancelled or postponed, and long rides outside not the best of ideas at the minute, I signed up to Zwift and enrolled on their Build me Up 12 week training plan to keep me going and hopefully make me a stronger ride. I'm now in the second week of the plan, and decided to buy a power meter to help with it. My current set-up is a classic trainer with speed/cadence sensors and a HRM. When the power meter arrives, should I re-do the FTP test on Zwift?
Anything else I need to keep in mind while using it? Thanks Since you already did an FTP test on Zwift, I would redo it. It is great training and it will serve as a starting point. Plus, it will take away one variable which is, what is my power FTP. You know how you felt after your previous Zwift FTP test. Read Racing and Training with a Power Meter and do some searches on FTP testing and training. There is a lot of interesting articles. Since you will know your FTP, the theory and practice of power training will make more sense. It is not that hard to understand and execute. What I found when I started training with power was that I was not generating as much force on the pedals over time as I thought I was. Heart rate and level of effort are okay but not great for determining pedal force. If there is an analogy, it would be that in the gym, I would bench press whatever, 100 pounds. I know it is 100 pounds and the force required to lift the weight remains the same. As I do more reps and sets, fatigue causes the level of effort to feel like it increases when in fact it is the weight is the same. I swear someone is adding weight. On the bike and during a structured interval, fatigue caused my brain to think that I was continuing to make MORE force as time progressed but in fact, the force was DECREASING. Like the weight in the gym, power is a true measure of force. As an added benefit, over time, my brain recalibrated and today, I am much better a riding a level of effort interval and can pretty accurately, know what my power is and not have it decline. So how does that benefit my training? I work harder with more effort at the end of the interval when it counts the most. Good luck. |
Originally Posted by Hermes
(Post 21411029)
Like the weight in the gym, power is a true measure of force.
(by the way, even in the gym, weight isn't a measure of force as the weight is accelerating) |
Originally Posted by spelger
(Post 21409972)
i still have a lot to learn now that i am gathering data. below is from a zwift training i did a couple of days ago...
before i really started looking at the data i made the incorrect correlation that a rising heart rate indicated increased power output, not so according to the big circled data. the small oval is what i had expected every time (black == power, red == heart rate). and what is your definition of effort vs long effort? a small 15 second micro burst of power being a short effort? based on what i see below i would agree. https://cimg6.ibsrv.net/gimg/bikefor...e6307bf328.png I'm not trying to talk you out of using HR, just filling in some technical detail so you or anyone else reading this can get better use out of their stuff. You can use a power meter to pace yourself in a long term way, by modeling your fitness and cumulative fatigue. So if you have an important ride coming up and want to perform well, you can do a better job of scheduling workouts to be at your best on that specific day. And even though I have a power meter, I use HR for this instead. |
Originally Posted by Hermes
(Post 21411029)
What I found when I started training with power was that I was not generating as much force on the pedals over time as I thought I was. Heart rate and level of effort are okay but not great for determining pedal force. If there is an analogy, it would be that in the gym, I would bench press whatever, 100 pounds. I know it is 100 pounds and the force required to lift the weight remains the same. As I do more reps and sets, fatigue causes the level of effort to feel like it increases when in fact it is the weight is the same. I swear someone is adding weight.
Most people don't hold a steady power when they ride. That's why almost everyone prefers to see the avg over the last X seconds instead of just at that instant. It jumps around a lot. It's like you benched 100 lbs, then 120, then 97, then 20 for a second while you changed your position on the saddle sightly, then 140, etc. Except on a bike, it's like you're benching whatever is on the bar at that moment, but the plates don't have numbers do you don't know how much you're lifting. Each pedal stroke has a different amount of force. (Not usually huge differences.) A power meter is like a scale so you know exactly what you're pressing. HR is how it's affecting you. Heart rate is influenced by things that aren't relevant to training. You want to be bench pressing 100 pounds whether you had too much coffee today or not, so when you're at the gym you go by weight not HR. I'm not saying you have to use power and ignore everything else, I'm saying people should be aware that HR and PWR are measuring different things. |
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