Suunto OW224 Mode D'emploi page 6

OPTICAL HEART RATE
Optical heart rate measurement from the wrist is an easy and convenient way to track your heart rate. Best
results for heart rate measurement may be affected by the following factors:
• The watch must be worn directly against your skin. No clothing, however thin, can be between the
sensor and your skin.
• The watch may need to be higher on your arm than where watches are normally worn. The sensor
reads blood flow through tissue. The more tissue it can read, the better.
• Arm movements and flexing muscles, such as gripping a tennis racket, can change the accuracy of the
sensor readings.
• When your heart rate is low, the sensor may not be able to provide stable readings. A short warm up of
a few minutes before you start the recording helps.
• Skin pigmentation and tattoos block light and prevent reliable readings from the optical sensor.
• The optical sensor may not provide accurate heart rate readings for swimming and freediving activities.
• For higher accuracy and quicker responses to changes in your heart rate, we recommend using a
compatible chest heart rate sensor such as Suunto Smart Sensor.
WARNING: The optical heart rate feature may not be accurate for every user during every activity.
Optical heart rate may also be affected by an individual's unique anatomy and skin pigmentation. Your
actual heart rate may be higher or lower than the optical sensor reading.
WARNING: Only for recreational use; the optical heart rate feature is not for medical use.
SAFETY
WARNING: Always consult a doctor before beginning a training program. Overexertion may cause
serious injury.
WARNING: Allergic reaction or skin irritations may occur when products are in contact with skin, even
though our products comply with industry standards. In such event, stop use immediately and consult a
doctor.
WARNING: For safety reasons, you should never dive alone. Dive with a designated buddy.
WARNING: Freediving involves risks that are not obvious. There is always a risk of decompression
sickness for all diving activity types and dive profiles. Suunto strongly recommends that you do not
engage in any diving activity type without proper training and a complete understanding and acceptance
of the risks. Always follow the rules of your training agency. Assess your own physical condition and
consult a physician regarding your fitness before diving.
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