How to contribute Cadence Data
I study cadenceversusspeed data to determine how a
runner's performance varies with their height, weight, age, gender and distancerunperweek. The project needs runners of any skill level who have access to a treadmill and a
running watch (or a video camera) to record their cadence.
So far the data indicates how a runner’s cadence relates to
their maximum speed, and how height affects cadence. As you can see below, taller runners have a
higher maximum speed and a lower cadence.
Even at moderate speeds, taller runners have a lower cadence compared
to shorter runners. Of course, faster
runners exhibit higher estimates of their VO2max (2) than slower runners. These runners represent a spectrum of
heights, weights and ages. By looking at
all the runners at a one speed, (along a vertical line), you can see how taller
runners have a lower cadence than shorter runners.
If you would like to see how your cadence and speed compare with others of the same height, weight and/or age consider adding your data by following the procedure below. All data is submitted anonymously through email. (Do not include any personal information, such as, your name or address.)
If you are interested in seeing how your cadence curve
compares with other runners, follow the procedure below and I will email a new
curve to you.
The test takes about 10 minutes and requires an initial
warmup. After the warmup you are asked
to run through a series of increasing 1minute speedsteps up to your maximum
safe speed on the treadmill. The test is
similar to that of a VO2max measurement, except that it requires that you
maintain a running or jogging gait throughout the test, starting at the very
lowest speed.
Your cadences at the very lowest speeds provide valuable
information on your legstiffness or springiness. This information can be used in a
physicsbased model (2) to help understand how a runner's power output changes
with speed.
By participating in this effort you will be able to compare
your performance with others, obtain two estimates for your VO2 consumption (1)
and see how your cadence and steplength affect your speed. If you have a treadmill and a running watch
or a video camera, consider contributing your data to this research.
Overview:
The test takes about 10 minutes.
After a warmup the test begins with of a series of increasing
1minute speedsteps starting from the slowest speed of 1 and increasing up to your
maximum safe speed on the treadmill.
Procedure:
1. Begin with a warmup run on or off the treadmill. You can perform the test after a regular run
or a short run on the treadmill.
2. Turn on your running watch.
3. Set the treadmill to 0% grade.
4 Set the treadmill to a first speed step of 1 mph or kph and
run at this speed for 1 minute. (Remember to use a running or jogging
gait. Do not walk.)
5. Increase the speed by 1 mph or kph and run at that speed
for 1 minute.
6. Repeat step 5 increasing the speed by 1 mph or kph up to the
highest speed that is just below your maximum safe running speed.
6. Finally, set the treadmill to your maximum safe running
speed and run at that speed for 1 minute.
When you are done, capture your cadence by one of two
methods.
If you have a watch that recorded your cadence, transfer
your run to your computer software. Write
down your speed and cadence at each speedstep.
If you made a video recording of your test, follow the
guidance below (3) for computing your cadence. Write down your speed and cadence at each
speedstep.
Email your cadence to me at Ted.Andresen@gmail.com
As shown below, begin your information with any twoletter
identification code of your choice. Add
a "1", "2", "3",
… in case you decide to repeat the test after a few months of
training. On the following lines enter your height, weight, age, gender,
average distancerunperweek along with your speedsteps and cadence (steps/min)
as shown below. Indicate if your speed is measured in Metric or American
units. Depending on the system of measurement; your column of
data should look similar to one of the columns shown below. Email your
data and any comments to Ted.Andresen@gmail.com
Description

Metric

American

2Letter
code + number 
AB1

CD1

Height

1.63 m

66 in

Weight

67 kg

145 lbs

Age

45

66

Gender

M

F

Distance
per week 
35 km

21 miles

speed
and cadence 
1 kph,155

1 mph, 167

2 kph, 157

2 mph, 166


3 kph, 160

3 mph, 170


4 kph, 165

4 mph, 174


5 kph, 165

5 mph, 176


6 kph, 172

6 mph, 180


Max Speed

6.7 kph, 180

6.5 mph, 182

I will add your data to the system and email a graph to you,
so you can view the estimates for your VO2 consumption and see how your cadence
compares with others of the same height and weight.
As the database grows I will continue to update the graph above,
so you will be able to see how your performance compares with that of similar
runners.
What you may find:
If you are concerned with your speed, you may find that as
your highest cadence increases your speed remains the same. Then, you might consider increasing your
steplength by increasing your hiprotation or your rangeofmotion. Or, you may find that you are performing the
same as other runners who have similar physical measurements and run the same
distanceperweek.
Thank you for your help.
(1) There are two equations for estimating VO2 consumption.
Both depend only on your speed. One estimate is based on an equation from
the American College of Sports Medicine (ACSM). The other is based on Dr.
H. Cooper’s 12minute run test.
(2) This is the Spring Mass model. It was
introduced in 1989. You can find many good examples of it on the
internet. Basically, it represents the runner as a central mass bounding
along on a set of springlike legs. By running at slow speeds it is
possible to estimate the legsspring’s stiffness and hence the energy due to
legcompression and expansion with each step
(3) To measure your cadence from a video, focus on one foot
so you can count the strides not your steps. Begin the stopwatch and the
count with the number “0”, not “1”. Measure the time in seconds required
to make 30 strides. Use a calculator to divide 3600 by the time on the
stopwatch. That is your cadence in steps per minute. Repeat this
process for each speedstep.