POLAR S610i - Manual (Page 77)

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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.
Minimizing Possible Risks in Exercising with a Heart Rate Monitor
Exercise may include some risk, especially for those who have been
sedentary.
Before starting a regular exercise program an individual is recommended to
answer to the following questions for health status checking. If the answer
is yes to any of the questions, we recommend to consult a doctor before
starting an exercise program.
• Have you not exercised for the past 5 years?
• Do you have high blood pressure?
• Do you have high blood cholesterol?
• Do you have symptoms of any disease?
• Are you taking any blood pressure or heart medication?
• Do you have a history of breathing problems?
• Are you recovering from a serious illness or medical treatment?
• Do you use a pacemaker or another implanted electronic device?
• Do you smoke?
• Are you pregnant?
Note that in addition to exercise intensity, medications for heart, blood
pressure, psyche, asthma, breathing etc. as well as some energy drinks,
alcohol and nicotine, can affect heart rate.