POLAR M21 - Manual (Page 48)

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FREQUENTLY ASKED
QUESTIONS
W H A T S H O U L D I D O I F . . .
... OWNZONE DETERMINATION ONLY SELDOM GIVES
ME HEART RATE LIMITS WHICH ARE BASED ON HEART
RATE VARIABILITY (OZ.V)?
1. Check that the elastic strap is snug enough.
2. Make sure that the electrodes of the transmitter are
moistened against your skin.
3. Put on the transmitter 15-20 minutes prior to the start of
your exercise to ensure good adaptation between the
electrodes and your skin.
4. Start the first stage of determining your OwnZone
sufficiently slowly. If you obtain the heart rate limits
based on age (OZ.A) within the first 2 minutes you have
raised your heart rate too quickly. The heart rate reading
should not rise over 20 beats/ minute from the starting
level. During the first stage you can, for example, put on
your sports clothing.
5. If you reach the OwnZone limits based on age (OZ.A) or
the previously determined OwnZone limits based on
your heart rate variability (OZ.L) only after 10 minutes
from starting specification you have not raised your
heart rate sufficiently rapidly. Raise your heart rate more
quickly during the OwnZone determination.
6. If you have always used walking and running to
determine your OwnZone, walking uphill, cycling or
using an ergometer may work better for you.
7. Stress or heavy mental loading may reduce your heart
rate variability so that the needed point where the heart
rate variability vanishes cannot be measured. Relax for 5
- 10 minutes before exercising by sitting down and
decreasing your heart rate.
M52 man USA GBR A 2001 10/12/01, 12:46 49