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Suunto 7
6. HEART RATE
Follow your heart rate with Suunto 7
Suunto 7 uses wrist heart rate (WHR) technology, also known as optical heart rate,
which measures heart rate via LEDs to track blood flow in your wrist. This means that
you can see your heart rate data during your exercise or in daily use without a chest
heart rate strap.
Factors that affect wrist heart rate measurements
How to wear your watch to improve HR measurements
Heart rate during exercise
NOTE: Suunto Wear app does not support using an external heart rate belt.
Factors that affect wrist heart rate measurements
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 compared to where watches are
•
normally worn. The sensor reads blood flow through tissue, so the more tissue it
can read, the better.
Arm movements and flexing muscles, such as gripping a tennis racket, can change
•
the accuracy of sensor readings.
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