Polar RS800 Running Computer Review

At the size of a wristwatch, the Polar RS800 Running Computer–reviewed here–is a triathlete’s, no hassle, data monitor.

Why Track Data?

You may have this question floating around in your head: “What benefits do I gain from buying a tiny computer that tracks my heart rate, foot stride, distance, lap times, and more?”

Polar RS800 CX Review

The simple answer is that if you collect all of the data surrounding a training session, you’ll know when, and where, you’ll need to work harder tomorrow.

Knowing your heart rate while running, or biking, is essential to discover when you are pushing yourself the hardest, and when you are getting lazy. If you finish a three mile run, and see that you didn’t peak at your highest heart rate, you know you didn’t push yourself hard enough. The same goes for the rest of the data. Looking over a graphical analysis of all your training data will tell you when you did your best, and when you can do better.

Polar RS800 CX Review

In order to keep track of all your training data, you’re going to need help. That’s where the Polar RS800 Running Computer comes into play.

A Sophisticated Wristwatch

The Polar RS800 Running Computer comes with three peripheral sensors to help keep track of your data: Those peripherals are the Polar WearLink W.I.N.D. Transmitter, the Polar S1 Foot Pod, and the Polar S3 Stride Sensor.

W.I.N.D. Transmitter

The W.I.N.D. Transmitter expertly measures your heart rate. This transmitter is connected to a strap that is wrapped snugly around the chest, just below the chest muscles. Connected to the strap are electrodes that measure the beats of your heart, displaying, and recording, the number of beats per minute on the Polar RS800 Running Computer.

S1 Foot Pod

The battery operated S1 Foot Pod is placed tightly in one shoe’s shoelaces so it can faithfully measure how far you’ve run and your speed/pace in doing so. All data is displayed, and recorded, on the Polar RS800 Running Computer on your wrist.

S3 Stride Sensor

Also battery operated, the S3 Stride Sensor is placed either in your other shoe’s shoelaces or a shoe cavity, to properly record your stride. Again, like the W.I.N.D. Transmitter and the S1 Foot Pod, all data is sent to be displayed and recorded on the Polar RS800 Running Computer.


When all of the sensors, and the Polar RS800 Running Computer, are up and running, they’ll record all data from your triathlon training.

The Polar RS800 Running Computer can be submersed in water, but it is not a diving instrument. Keep that in mind while swimming.

Also, be careful to not press any buttons on the watch as that will lower its water resistance. The heart monitor will record underwater, but be wary of a couple possible interferences.

Seawater and chlorine may cause the electrodes to short-circuit, destroying them, and excessive muscle movement during swimming may jostle the electrodes around, rendering them useless for accurate heart rate monitoring.

What To Do With The Data?

Polar Pro Trainer 5 software also comes with the purchase of the Polar RS800 Running Computer. This software displays your data on a home computer with easy to understand graphs.

It also allows you to plan various, aggressive training sessions, which can be transferred to the Polar RS800 Running Computer to guide you on your next training run. You can set goals and see how close you are to reaching your triathlon potential.

The Polar RS800 Running Computer is an easy to use, accurate data recorder, at a great price. Drop by Triathlete Sports for the lowest prices on the internet and free delivery.


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