8.For a small percentage of people the heart rate variability will not totally disappear with increasing workload. In this case the
...THE OWNZONE HEART RATE LIMITS BASED ON HEART RATE VARIABILITY (O.Z.V) VARY CONSIDERABLY?
Heart rate variability reacts sensitively to all changes taking place in the body and environment. The O.Z.V heart rate limits are affected by, amongst others, your daily state of fitness, the time of OwnZone determination, the type of exercise and state of mind. The lower limit of the O.Z.V heart rate limits can change for the same person by as much as 30 beats.
However it is important that the effect of exercise carried out in the OwnZone feels light, or moderate. For example if you raise your heart rate too rapidly after the first stage, you may get too high OwnZone heart rate limits. If the
... SOME OTHER PERSON USES MY POLAR M71 ti
HEART RATE MONITOR?
Polar M71 ti determines the OwnZone heart rate limits on the basis of heart rate and age. If someone else uses your Polar M71 ti Heart Rate Monitor it is necessary to zero the O.Z.V. heart rate limits which are in the memory. Zeroing is done by resetting the age in the USER mode with the 
/LIGHT button.
Even although the user is the same age as you the age must still be reset in order that the O.Z.V heart rate limits are zeroed. If this is not done the Polar M71 ti may give the following user OwnZone heart rate limits based on your heart rate variability which is stored in the memory of the equipment.
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