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More recent devices use optics to measure heart rate by shining light from an LED through the skin and measuring how it scatters off blood vessels. In addition to measuring the heart rate, some devices using this technology are able to measure blood oxygen saturation (SpO 2). Some recent optical sensors can also transmit data as mentioned above.
The battery is water-proof and can charge the device while in use on the body. [14] The wearable device collects data on sleep, heart rate variability, resting heart rate, and respiratory rate to create a daily recovery score for users. [15] The recovery score ranges from 0% to 100% to let users know if their body is recovered or if it needs ...
There have been concerns by users of the device measuring their heart rate at a consistent and continuous level, especially when in excessively motion. [11] Many studies have assessed the accuracy levels of these wearable devices to measure and monitor heart rate and have found these devices to provide valid results to users.
Heart rate variability visualized with R-R interval changes Electrocardiogram (ECG) recording of a canine heart that illustrates beat-to-beat variability in R–R interval (top) and heart rate (bottom). Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the ...
For example, measurement of sweat rate was possible only in laboratory-based systems a few years ago but is now possible using wearable sensors. [27] Heart rate variability (HRV) has the potential to determine the quality of an exercise regimen. Additionally, HRV is recommended among the athletic community as a warning sign for over-training.
This allows the heart rate and heart rate variability (as measured by RMSSD) to be determined. Oura's sensors capture the wearer's biometric data at significantly higher frequency than wearable products from competitors such as Apple Inc. and Fitbit. [14] The device can also measure body temperature and menstrual cycle.