Polar S710 user manual Polar heart rate monitor and interference, Electromagnetic interference

Polar heart rate monitor and interference

Electromagnetic interference

Disturbances may occur near high voltage power lines, traffic lights, overhead lines of electric railways, electric bus lines or trams, televisions, car motors, bike computers, some motor driven exercise equipment, cellular phones or when you walk through electric security gates.

Exercise equipment

Several pieces of exercise equipment with electronic or electrical components such as LED displays, motors and electrical brakes may cause interfering stray signals. To try to tackle these problems, relocate the Polar wrist receiver as follows:

1.Remove the transmitter from your chest and use the exercise equipment as you would normally.

2.Move the wrist receiver around until you find an area in which it displays no stray reading or flashing of the heart symbol. Interference is often worst right in front of the display panel of the equipment, while the left or right side of the display is relatively free of disturbance.

3.Put the transmitter back on the chest and keep the wrist receiver in this interference-free area as far as it is possible.

4.If the Polar heart rate monitor still does not work with the exercise equipment, this piece of equipment may be electrically too noisy for wireless heart rate measurement.

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Minimising possible risks in exercising with a heart rate monitor

Exercise may include some risk, especially for those who have been sedentary. To minimise possible risks consider the following advice:

Before beginning a regular exercise program consult your doctor

•if you are over 40 years of age and have not been following a regular exercise program during the past 5 years

•if you smoke

•if you have high blood pressure

•if you have high blood cholesterol

•if you have any signs or symptoms of any disease

•if you are recovering from a serious illness or a medical treatment e.g. surgery

•if you use a pacemaker or another implanted electronic device.

Note also that in addition to exercise intensity the heart rate can be affected by, amongst others, heart, circulation (particularly high blood pressure) and asthma and other breathing medications, as well as some energy drinks, alcohol and nicotine.

It is important to be sensitive to your body’s reactions during

the exercise. If you feel unexpected pain or tiredness regarding your exercise intensity level, it is recommended to stop the exercise or continue at a lighter intensity.

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8/3/01, 14:34