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=If you need Heart Rate Variability – Polar RS800CX=
[[File:PolarRS800CX.jpg|thumb|none|200px|Polar RS800CX]]
I used Polar systems for many years and their quality is great. However, I find the convenience of the Garmin GPS systems to be superior and I would no longer recommend the [http://go.fellrnr.com/?id=35454X937677&xs=1&xcust=BestWatchRS800&url=http%3A%2F%2Fwww.amazon.com%2FPolar-RS800CX-Heart-Rate-Monitor%2Fdp%2FB003G3YBR6 Polar RS800CX] unless you need a first rate [[Heart Rate Monitor]] that will display [[Heart Rate Variability]].
==RS800CX Pros==
* Heart rate monitoring is far better than with Garmin. The RS800CX will even record each individual heart beat for analyzing [[Heart Rate Variability]], though few people will ever make use of that feature.
