Minimizing Risks When Exercising - Polar Electro RS400 User Manual

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move away from possible sources of disturbance.
Exercise equipment with electronic or electrical components such as LED displays, motors and electrical
brakes may cause interfering stray signals. To solve these problems, try the following:
1. Remove the transmitter from your chest and use the exercise equipment as you would normally.
2. Move the running computer around until you find an area in which it displays no stray reading or does not
flash the heart symbol. Interference is often worst directly 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 your chest and keep the running computer in this interference-free area as
much as possible.
If the running computer still does not work with the exercise equipment, it may be electrically too noisy
for wireless heart rate measurement.
Crosstalk
A heart rate symbol without a frame indicates non-coded heart rate transmission. When in non-coded
mode, the running computer picks up transmitter signals within 1 m / 3ft. Simultaneous non-coded
signals from more than one transmitter can cause an incorrect reading.
If another person with a running computer or a heart rate monitor is causing interference, move away from
that person and continue your exercise normally.
Alternatively, to avoid other people's heart rate signals:
1. Take the transmitter off your chest for 30 seconds. Move away from the other device.
2. Put the transmitter back on and bring the running computer up to your chest near the transmitter's Polar
logo. The running computer will start searching for a heart rate signal again. Continue your exercise
normally.
Using the Running Computer in Water
The running computer may be worn when swimming. It is not, however, a diving instrument. To maintain
water resistance, do not press the buttons of the running computer under water. When measuring heart
rate in water, you may experience interference for the following reasons:
• Pool water with a high chlorine content, and seawater, are very conductive. The electrodes of a transmitter
may short-circuit, preventing ECG signals from being detected by the transmitter.
• Jumping into water or a strenuous muscle movement during competitive swimming may shift the
transmitter to a location on the body where ECG signals cannot be picked up.
• The ECG signal strength is individual and may vary depending on the individual's tissue composition.
Problems occur more frequently when measuring heart rate in water.
The S1 foot pod can be used in any wet running environment, including rain, but it is not intended for
underwater use.

Minimizing Risks When Exercising

Exercise may include some risk. Before beginning a regular exercise program, it is recommended that you
answer the following questions concerning your health status. If you answer yes to any of these questions,
we recommend that you consult a doctor before starting any training program.
• Have you been physically inactive for the past 5 years?
• Do you have high blood pressure or high blood cholesterol?
• Are you taking any blood pressure or heart medication?
• Do you have a history of breathing problems?
• Do you have symptoms of any disease?
• Are you recovering from a serious illness or medical treatment?
• Do you use a pacemaker or other implanted electronic device?
• Do you smoke?
• Are you pregnant?
48 Customer Service Information