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ENGLISH
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 and OwnIndex features.
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For more facts and know-how to enhance your cycling, visit Polar Article Library
[http://articles.polar.fi/en/1_segment.html].
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