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HRV indicates the fluctuations of heart rate around an average heart rate. An average heart rate of 60
beats per minute (bpm) does not mean that the interval between successive heartbeats would be
exactly 1.0 sec, instead they may fluctuate/vary from 0.5 sec up to 2.0 sec.
HRV is affected by aerobic fitness. HRV of a well-conditioned heart is generally large at rest. Other
factors that affect HRV are age, genetics, body position, time of day, and health status. During
exercise, HRV decreases as heart rate and exercise intensity increase. HRV also decreases during
periods of mental stress.
HRV is regulated by the autonomic nervous system. Parasympathetic activity decreases heart rate and
increases HRV, whereas sympathetic activity increases heart rate and decreases HRV.
HRV is used in the Ownzone, OwnIndex, and OwnOptimizer features. It can also be monitored on its
own using the cycling computer. If your HRV changes at a given cycling pace and heart rate, this may
indicate a change in your training load and stress.
R-R Recording
R-R recording rate saves heartbeat intervals, i.e. intervals between successive heartbeats. This
information is also shown as instantaneous heart rate in beats per minute in recorded samples.
When recording every single interval, extra systoles and artefacts can also be seen. We recommend
using contact gel (ECG gel) to optimize contact between your skin and the transmitter. Readings
interpreted as incorrect in the heart rate data can be adjusted and corrected with the Polar ProTrainer
5 software.
For more facts and know-how to enhance your cycling, visit Polar Article Library
[http://articles.polar.fi/en/1_segment.html].
13. CUSTOMER SERVICE INFORMATION
Care and Maintenance
Like any electronic device, the Polar cycling computer should be treated with care. The suggestions
below will help you fulfill guarantee obligations and enjoy this product for many years to come.
Caring of Your Product
Detach the transmitter connector from the strap after use. Clean the connector with a mild soap and
water solution. Dry it with a towel. Never use alcohol or any abrasive material (steel wool or cleaning
chemicals).
Rinse the transmitter strap with water after every use. If you use the strap more than three times a
week, wash it at least once every three weeks in a washing machine at 40°C / 104°F. Use a washing
pouch. Do not soak, and use neither detergent with bleach nor fabric softener. Do not dry-clean or
bleach the strap.
Wash the strap before long–term storage, and always after use in pool water with high chlorine content.
Do not spin-dry or iron the strap. Never put the connector in a washing machine or a drier! Dry and
Polar CS600X User Manual 51