Training With A Powermeter

February 25, 2009

It’s been a while since I last used my Powertap.  It had stopped working just before Christmas but the great guys at TFM and Powertap quickly got me back on track.  After every ride I’m eager to download my stats, graphs and data to analyze it and pick it apart.  If you’ve never used a powermeter before I highly recommend it.  If used properly it will completely change the way you train.   A Powertap costs less than a cheap set of carbon wheels and you’ll keep seeing the benefits for years to come.  A set of carbon wheels will look good but won’t get you much in the long run.

For the past month I’ve been in my Strength Endurance (SE) block of training.  That means that twice a week I’ll go out and do some “overgearing” work.  I’ll push hard up a 15-20minute climb using big gears at about 60rpm at ~400watts.  I’ll do 2 or 3 of these climbs per session twice a week and that’s enough.  You don’t want do overdo these sessions or they won’t be effective.    Combine this with a block of speed work and a block of power and you’ll be flying!  Note: there’s been a long debate on whether these SE sessions actually produce enough overload to make a beneficial adaptation on your strength component.  However, I find my body responds well to these and that’s all the proof I need.

Below are the stats that my Powertap recorded for my Saturday ride.  I did two of these SE climbs and then a third  climb at a higher cadence of 90rpm.

Summary Page – this page shows a summary of my last ride and the power zones that I trained in.  It will amaze you at how much time you spend in your recovery and endurance zones, even on a ride that you rate as being extremely difficult (don’t pay attention to heartrate. The data stopped half way into the ride. But, with a powermeter you’ll never pay attention to HR again ).  This is not a bad thing or something that you’ll aim to change.  The stats just point it out.  On the top right are your max power levels of the ride for different time intervals compared with your personal best power levels from combined previous rides.  This allows you to track your progress to see if you are getting stronger from your training.

The Details Page shows the overall ride and what it looks like as a graph.  You can see the 3 climbs that were done in my ride

The Powertap “Power Agent” software also lets you zoom in to analyze a particular part of your ride.  This one shows the first climb and at the bottom is all the data associated with it.

This is some of the great information you can get from a powermeter.  It also allows you to add notes, RPE and other information so you have a record of your rides. Interpreting and using the information that it gives you so you can improve with it will have a thousand more blog posts in the future.   The first thing you need to know to make the powermeter worthwhile is your Lactate Threshold.  I’ve written a post on how to test your threshold here .  This will determine all of your training zones and allow you to guage improvement.

There’s a website called TrainingPeaks.com that has a lot of great resources for power training to get you started.  Also check out Saris.com for some great power training information.

saris_300x100_jan09

  • Will T
    Nick - using a powermeter in racing is far from being simply an expensive bike computer. Many argue that the data from racing is the most important out of everything!

    As an example, if you are away in a breakaway, and you know your FTP is 350W, you are aware that if you are averaging over that then it is unlikely you will be able to continue that pace the whole time.

    Also, it is really good data to go back and review, to work out where you need to improve for next time. For example if you are racing the Warrny, and when the break goes you just couldn't get on the back. Well although there are other variables in play, you are able to see what sort of power was required to make the move, and make sure you are able to replicate that through training for next year!

    Never underestimate the importance of being able to replicate race data to make sure your form is where it needs to be. Cycling training for the most part is about specificity. If you can't climb at 400W for 20 mins in training, then it is unlikely you will be able to do well in a race, which you know for last year had a 20min climb and the avg. power sitting with the bunch was 400W.
  • cyclingtips
    S,
    Yes, that's a great way to put it. I have a great example from this morning's workout that I'll post in a few days that drives the point home.

    cheers,
    .::W
  • S
    Thanks for the succinct and well thought out answers. So a huge benefit is extremely accurate data in a very timely fashion. The grey area is removed; you weren't 'around about' the right zone, you were IN the right zone.

    I can see how this would increase training efficiency because if you are never sure that you have done an hour in a particular zone the tendency is to ride a bit longer to make sure you have.

    The other big plus appears to be the analysis, comparison etc post-ride, post-training block, post-season.

    Thanks again.
  • Skipster
    when doing sprint intervals I can try to see if I can beat my best previous power reading. If you do this by speed there's too many variables (even on the same road) that makes it inaccurate

    another great thing about the powermeter is that it allows you to figure out what works best and most efficiently for you with regards to cadence and power on the pedals. I find that I get much more power out of my sprint if I use a high cadence rather than dropping it into my 11 and slugging it out as hard as i can. the numbers prove it (unfortunately the results don't!)
  • Scott
    I train with a Power Tap as well and I find that my recovery rides have greatly improved. If you are doing a recovery ride with a HR monitor, you might be riding in your tempo zone for a while before your HR responds. If you do this over an over throughout your ride you are no longer doing a recovery ride. With a Power Tap you can set a goal to not go over 200 watts for 1-1.5 hours and really keep track of it.
  • cyclingtips
    Great question S. The thing that would change with a powermeter is that it allows you to gauge that efforts more effectively. Instead of just"going hard" up a hill, it allows you to know exactly "how hard" of an effort you should maintain. Different types of intervals require different types of training zones. For example, if an anerobic power interval should be done at 150% of your lactate threshold for 2 minutes, you know exactly how much power you need to generate for that interval to be effective. It's easy to go out too hard and then completely die half way into the interval. You still feel like you're generating the same amount of power, but in reality you're only pushing a small wattage because you've gone way past your LT. It would have been much more beneficial to have gone at your proper training zone rather than go hard and then die.

    A HR monitor allows you to gauge your efforts decently, but there is such a lag behind HR and actual power that in the high intensity intervals it's not effective.

    Another thing that is great is to use it for is to analyze your efforts after the ride to see where your weaknesses are. I should do some posts on that. My race last night exposes a bunch of those!

    Of course there is a lot to know about training to make this an effective tool. That's half the fun in my opinion
  • S
    Maybe your future posts will deal with this, but how exactly does a PM change your training? Besides giving you watts over bpm/speed/time etc (The benefits of watts vs everything else I understand).

    For instance, your in a SE phase. When I do Strength I basically do what you do. I head to a local hill and push the biggest gear I can which gets me an rpm of ~60 at a speed I can maintain for the whole climb. So my question is, if I had a power meter, what would I do differently? I would know exactly how many watts I have pushed for that hill, but if I am doing the designated workout, how does that change with a PM?

    That's what I never get about PM's. As one very specific example, how did your Strength workout change once you got a PM? Is strength an area in which PM have a lesser effect? For instance, is the PM more valuable for higher intensity interval training?

    Sorry for the long post and the ignorance!
  • Homer
    you are a monster! 400watts for 3 of those 15min climbs in a big gear?!! Are you sure you didn't fudge those numbers? That's massive!
  • Jesse
    one thing i notice about training with a powermeter is that you never have a great day. i.e. you'll never pull out an amazing wattage for an amazing amount of time just outta nowhere. your progress will gradually increase and the powermeter will tell you that. if you judge by speed or by time there's so many factors that can influence that result. power is absolute and will give you a real idea of how you're going.
  • Chris
    I got a powertap based on Cyclingtips' recommendation last year when it was first posted. I'll never look back. It's the best training tool you could every buy.
  • Nick
    Powertap is the way to go unless you have $5k burning a hole in your pocket for an SRM. It's only a training tool anyway that you wouldn't use for racing (therefore you can use your race wheels and not worry about it). In a race a powermeter becomes just an expensive speedometer.
  • James
    I've often heard that a power meter will change the way you think about training. Looking forward to the posts that tell you how to actually use and interpret the information that it gives you
  • beloki
    I absolutely agree that this tool is worth every cent. You'll never coast on descents again and will be amazed at the difference in power when sitting in the middle of a fast moving bunch as opposed to sitting up/near the front!
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