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CAPITOLO 5
CAPITOLO 3
Heart Rate Measurement
Calculation of heart rate is taking into account the volume of arte-
rial blood, taking advantage of the fact that an increase in heart
rate is associated with an increase in blood volume.
The technology used by optical sensors used in heart rate FITNESS
bracelets is photopletismography (PPG) that records changes in
the volume of blood through the skin's light absorption variations.
In other words, light diffuses in tissues differently based on chang-
es in hemodynamic fluxes.
The optical sensor consists of 2 LEDs that send light waves to the
body.
The FITNESS bracelet processor captures the portrayed light and
translates it into the heart rate of the person.
These values are then sent to the bracelet display (if available )
and to the application installed on the smartphone, where real-
time and / or statistical measurements will be highlighted during
the day
Algorithms can also give more information about consumed calo-
ries, blood pressure, and blood oxygenation.
NOTE: This device is not a medical device and can not be ap-
plied for any medical function, the read values are considered
for purely amateur purposes
USER MANUAL page 9
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