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From Fellrnr.com, Running tips
Cadence
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[[File:Cadence Comparison.jpg|none|thumb|1000px|A comparison of cadence monitoring devices.]]
The graph above is from a [[High Intensity Interval Training]] session, which is a challenging test of Cadence monitors. The [[Warmup]] and [[Cooldown]] sections of the run are not included, just the intervals. You can see the cadence rise to above 100 during the fast, high intensity intervals, then drop back to my more normal 90, then a further drop as I walk for a short period before commencing the next interval. I don't normally walk, but I wanted to challenge the cadence monitors a little extra. I avoided looking at any device during the run, as that can prevent the internal accelerometer based systems from operating without the normal arm swing.
* I wore five watches, two [[Footpod]]s and the Garmin HRM Run sensor for the run.
* The blue line is from a [[Polar M400]] with the Polar Stride Sensor [[Footpod]]. The Stride Sensor is huge, but it seems to provide the best data. The Polar data is smoother (greater sampling frequency), and reflects the changes in Cadence a little better than other sources. For instance, I stood stationary for a few seconds around the 7:30 mark, and the Polar reflects this drop better.
* The purple line is from a [[Garmin 920XT]] with a Garmin Footpod. This is very nearly as good as the Polar data, and matches the changes fairly accurately.