An Introduction to Running Cadence

Cadence is the number of steps a person takes per minute, so make sure your cadence is working for you.

Among all things tech-lovers, data junkies, or sports science nerds like myself can track, running cadence is one that can be easily monitored on a GPS device. A 2016 study showed that using a commercially available watch like a Garmin is a reliable, valid way to track cadence, among other factors. ^1,9 
 

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source http://breakingmuscle.com/fitness/an-introduction-to-running-cadence