Polar RS300X G1 Heart Rate Monitor Watch with G1 GPS Sensor Black
November 8, 2009 by Running Watch Reviews
Filed under GPS Running Watch Reviews, Polar, Polar GPS, Running & Sports Watch Reviews
Polar RS300X G1 Heart Rate Monitor Watch with G1 GPS Sensor (Black)

Retail Price: $249.95
Amazon Price: $145.82
Now you can ensure that you have the proper training to give your body the burn it needs with the Polar RS300X Heart Rate Monitor Watch.
With its heart rate monitors and built in training zones, you would be able to create and customize your workout! Through these features of the RS 300X you would be able to easily adjust your pace and training intensity according to your body’s capabilities.
This version of the RS300X comes with the Polar G1 GPS sensor.
The addition of the Polar G1 GPS Sensor \means that along with the training zones, pace and intensity, you would also be able to learn your speed and pace as well as distance when doing outdoor sports such as cycling, skating, biking or even hiking.
All of the data that you gather from your training can easily be transferred to a computer.
The RS300X has built in compatibility with the Polar FlowLink device and software to allow you to easily transfer data from your training to your computer.
Features include:
- Polar OwnIndex Fitness Test calculates aerobic fitness (comparable to maximal oxygen uptake, VO2max) providing a reference to base training intensity and measure improvement.
- Polar OwnCal: Shows your energy expenditure during one exercise session as well as your accumulated kilocalories during several exercise sessions. Because the OwnCal tracks both the energy expenditure during one exercise session and the accumulated kilocalories during a longer time e.g. one week, it helps in achieving both short term and long term goals.
- Time in Target Zone feature calculates the amount of total training time spent in your personal target zone. You can use this feature together with the Total Exercise Time to determine the effectiveness of your training program.
- Number of laps – 99
- Watch features: alarm with snooze, dual time zone, stopwatch
- Compatible with Polar FlowLink (available separately)
- Water resistant to 50 meters
- Backlighting, display zoom
- Event Countdown Timer: Keeps your motivation high by showing how many days are left before your next running event (e.g., Berlin 23 days).
User Ratings and Reviews
5 Stars Good Stuff
I’ve been using the RS300X since I got it two weeks ago.
The heartrate is very easy to see and use. The GPS works fine, just be aware that if you end up running on trails/trees, it’s going to have some difficulty staying in close contact with so be ready for your time to get a little wacky. I treat the GPS as a tool to use and figure the average is going to be just fine.
3 Stars Bitter-sweet experience
I consider myself a beginner when it comes to running. After looking around for several options, I decided to get the Polar RS300X G1 because of its multisport capabilities. I could easily run or ride my bike with it, and I would be able to measure distance and pace with the same device, without having to install/uninstall things to my bike every time I wanted to change excersices. After considering the Garmin 305 I decided to go for the Polar because of the extremely big and uncomfortable size of the Garmin. Everything looked nice in the website, but the story changed after only a few weeks I’ve owned the training computer.
1) The watch itself is incapable of transmitting data to the Polar site (or any other running website) which makes it a little boring for you as a user to log in and “manually” enter your data every time you complete an excersise. I was very sad to know that in order to do this automatically I have to separately purchase an extra device (Polar Flowlink @ $55.00).
2) I have been experiencing some problems with the accuracy of the distance. Since I just got my watch a few weeks ago, I entered in several forums to see if any other user was experiencing what I was going through, and to my unpleaseant surprise, yes… they were. Basically, the battery life of the G1 GPS Sensor is so short that you can only use it for up to 8 hours. More than that and you will start getting incorrect data from your runs. What is the purpose of a GPS sensor if you can get accurate data from it? Now I will have to constantly purchase batteries just to keep my distances correct.
Very sad that Polar hasn’t come with better solutions for this issues. I saw several users unhappy about this same thing in their own web site.
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