How to train with a power meter
By Hunter Allen
O.k. Great, now you have bought one of these things, installed it
ever so carefully on your bike, figured out how to toggle between
two buttons and 4 screens while riding one handed at 25mph, what the
heck do you actually do with it?
Well, the answer is, lots of things. Let's take each of those
items and break them down so that you can get the biggest bang for
your 'training' buck so to speak.
First and foremost, you need to start some formal testing with
it. The very first test you should do is a test in which you just
start to find out how the thing works and establish your 'fitness
baseline'. I call this test your "monthly test", as you
should be doing this once a month in order to track changes in your
fitness and make assessments and changes to your training program
based on the results of the test.
The Monthly Test: 20minute warm-up, which is just riding
along at a moderate pace, about 65% of your max HR. Then do (3) fast
pedaling efforts for 100rpm for one minute each with one minute
between each. Then 3 minutes easy.. Then Go for it - (1) 5minute all
out. Punch it and hold it! Make sure that you start at a high pace,
but not so high that you die at the end. You should have a little in
reserve to kick it to the finish line in the last minute. Then
10minutes easy, then (3) 30 seconds "Super Sprints". Jump
as hard as you can and then Sprint like a crazy for 30 seconds. REST
3minutes between each. WAY EASY! Then time for (3) 1 minute all out
efforts. REST for at least 4-5 minutes between each. Finish the Ride
and cool down. Again, you are trying to produce the most average
watts over the entire period. It's not a good test, if you go out
too hard and then just explode and limp home…Cool down, and then
download the computer!
You need to do a separate test on another day for a solid
20-minute effort as hard as you can go. Same warm-up as above,
including the fast pedaling intervals, but now just do the 20 minute
Time Trial.
What these tests do is that they gather some information about your
fitness in different time periods. Because, although you may think
you are fit for that upcoming time trial, you may test very poorly
in the 20 minute test, in relation to the 5 minute test. So, from
that info, you can change and tailor your workouts, but more about
that later. This test also is your first test with a power meter and
there is a little learning curve, so it's nice to have a test from
the beginning that isn't too involved and you can get an idea of how
to pace yourself better for upcoming future tests.
Once you have the data from the test, make sure to
"pull" it out of the software, so that you can put it into
an Excel Spreadsheet for each time interval. This will be your
baseline against which you will be testing each month.
O.k. So now that you have done the "Monthly Test", you can
start training with Power, and not so much HR anymore. Based on your
20-minute test, you should have a good idea of your Lactate
threshold wattage, and from there you can calculate your power zones
using this simple calculator on the web.
Establish Optimal Cadence: These are more tests that
are designed to help you figure out what is your optimal cadence
over different time periods. You see, not everyone is meant to spin
a fast gear like Lance. Some of us are more efficient and produce
more power for each heartbeat, in the 85-90 rpm range. Some are more
efficient in the 95-100 rpm range. Which are you? That's what we are
going to figure out.
This involves a series of 3 tests. The first test is a
self-selected test and you've already done it! That baseline test
was also the first cadence test! You did the test protocol in the
cadence that felt right to you. That's all that matters. You did
your best in the gear and cadence that felt like you are putting out
the greatest power that you can do. This is your baseline.
Make sure to take it easy the day before, so that you do a good
test. No sense in doing the test if you are sick, tired or stayed up
all last night with the drinking buddies. So, be sure to do the test
on a day that you are planning on being strong and psyched to go!
Now, from the basis of this first test, you need to look at the
specific intervals and figure out your average cadence from each
effort. Go into the Ergomo Racer Software and copy the information
out of the Summary window on the Journal page, after you have
highlighted the significant test periods. This is really the only
important thing at this point in the process.
So, once you have your average cadence for each interval, then
this will help you determine the 'restricted cadence' of the next
test. If your self-selected was 85rpm, then the next test should be
a low cadence test with cadence restricted to 70rpm and below for
each time interval. This means that you must set the resistance and
gearing as such that you can go as hard as you possibly can, but
stay under 70rpm. This will then give you a comparison to the
self-selected cadence. Did you produce more power for some time
intervals for the lower cadence? What about Heart rate? Was your
heart rate lower per watt for the self-selected? What was the
power/hr ratio for this compared to your self-selected? These are
things you'll need to be asking yourself.
Now, the final test. This needs to be a high cadence test. So, go
15 rpm's above the self-selected to get high cadence. Once
completing this test, you can compare all three together and see at
which time interval you are the most efficient. Efficiency
incorporates the max watts you produced, the average watts you
produced, your max heart rate and average heart rate for each time
interval. For the 1-minute test, was your max HR higher for the high
cadence as compared to self-selected, but the average watts were
lower? So, you need to look at the whole picture when comparing the
3 tests side by side. And guess what? Some of them will be so
similar that it's a toss-up to which is better. If Average watts and
average HR are very similar, than I look to the Max watts for a
tiebreaker. If that is similar (within 15watts), then I look to
actual distance covered and see which is greater. If all are still
the same, then go with what you think, but be prepared to test this
time interval again in 4-6 weeks.
So, now you should a clear picture (or spreadsheet) ;-) of your
cadence, power and heart rate for each time interval. You should be
able to now see which cadence is more efficient for 1 minute and all
of the rest of the time periods. Now, you ask, why is this
important? It's important because there will be many times in a race
or training ride, in which you will have a good ballpark idea of how
long an interval will be. This way you can select the correct gear
for the upcoming effort and know that you are maximizing your
effort. Know that there is a 30 second out of the saddle burst you
have to do on every lap? Know you are going to attack 100 meters
before a corner and then accelerate hard for the next 2 minutes?
Know you have a little rise in the road that you have to pop over?
Got a 40k TT coming up? Now, you can select the right gear for each
situation.
The other side of this is that you find out what your weaknesses
are regarding cadence also. If your watts fall by 30-40 watts when
riding in a bigger gear, than you might want to start incorporating
some low cadence/high force workouts into your routine. If your
watts fall by 20-30 when spinning a smaller gear, or if you know you
have trouble with little accelerations, then maybe you want to
incorporate some fast pedaling intervals into the equation.
By Testing your cadence you now have a baseline and a place to
go. Time to start working on those weaknesses. Testing your optimal
cadence now allows you to really figure out where you can improve
your power output at different time levels.
How to use your power meter in training
When you have your wheel circumference measured, and make sure to
measure it exactly with your weight on the bike and correct tire
pressure in the tire, then you are ready to go training.
The first thing you'll notice is that your power is highly
fluctuating. Andy Coggan, PhD, has coined the usage of the word
"stochastic" to describe cycling. This means that cycling
is highly variable and not quite random, but darn close. So, you
spend plenty of time not pedaling, pedaling a whole lot, pedaling
with a huge wattage and also just kind of noodling along. Lots of
things will affect your power: wind, hills, type of rider(s) you are
riding with and many more things.
So, if your power output is highly variable, then how are you
going to train in some certain range of power?
Well, a lot of times, you're not. You simply just won't be able to
hold a steady range of power on the terrain that you are riding.
There will be too many external influences that won't allow you to
ride in a specified range.
However there will be plenty of times that you will be able to. In
order to do this, you'll have to plan for that and really get
yourself psyched to go out and do a workout based on power. Other
times, you are going to use your power meter as a retro tool, a way
to view the info on your ride after the ride is over. Both are valid
and should be used. Sometimes, you think you are pedaling 90rpm, but
when you downloaded the data from the power meter you find that you
were only pedaling 85rpm. The power meter download allows you have
this retro-look.
Training Opportunities in which to train using your power meter.
- Trainer- Easy to regulate your wattage as there are no
external influences.
- Flat Roads- utilizing a specific wattage protocol
- Time Trials -Pacing tool and to select the best cadence.
- Hill Climbs-Pacing tool and to select the best cadence.
- Specific Intervals and training protocols.
- "Race Winning Intervals"
Each of these have many ways in which you can use your power
meter.
For a time trial, you will use it as a pacing tool, and make sure
you are not exceeding a certain wattage during your time trial and
therefore blowing up and losing valuable time.
For a hill climb, you will be able to push a certain number of
watts in order to maintain the highest pace you can sustain in the
climb. You will also be able to adjust you cadence in order to see
you power go up and then also see your HR go down.
What to look at in your Downloads.
First things first, take off as much smoothing as possible in the
software program. You really need to look at the true data and not
smoothed data. Get used to seeing the real data and tell all your
friends how many watts you really produce and not some guesstimate
based on your smoothed data.
Look at:
- Periods of significant efforts. For example: A 15 minute
interval that you did at Sub LT HR.
- Significant fluctuations in power and count them.
- Cadence when you have time periods of high power output.
- How many kilojoules of energy did you put out?
- MAX wattage, and average wattage for selected duration of
interest.
- Heart Rate at significant time periods.
- Try to pinpoint areas of a race that have significance and
look at them to see what made or broke that part of the race.
- Look at the area of time that you got dropped and see what
happened. Maybe your cadence was too low for 10 minutes before.
Maybe your pedaling stroke became sloppy as you got more
fatigued and your torque got too high compared to the power
output.
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