Polar Running Index

Illustrates how your running performance is developing.

If you’re looking to keep on top of your running performance you’ll find this feature a big help. Regular use over time allows you to see how efficient your running is. Your Running Index score is calculated automatically after every run, based on your heart rate and from the speed data collected from your GPS or stride sensor. A higher reading indicates that you can run faster with less effort.


Running Index

Running Index is based on heart rate and speed data measured during the run. It gives daily information about your performance level, both aerobic fitness and running economy. Improvement in running efficiency indicates improved economy of running performance.

Running Index is calculated during every exercise. Recording of heart rate and speed signal are needed for it. Please note that:

  • You need to have a compatible sensor to record speed. These are: s3 /s3 stride sensor and G5/G3 GPS sensor.
  • Recorded running speed needs to be 6km/h / 3,75 min/h or faster.
  • Running duration needs to be minimum of 12 minutes.
  • Heart rate should be above 40% of your HRR (heart rate reserve) value. HRR is the difference between maximum heart rate and resting heart rate.

Polar Running Index





How do I use Running Index feature in my training?

What are the benefits of Running Index?

How's Running Index calculated?

Does Running Index reflect my fitness level?

Long-term analysis

Running Index on RCX5

Running Index on RCX3

Running Index on RS800CX

Running Index on RS400

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