Types of heart rate sensors Sample Clauses

Types of heart rate sensors. There are three types of devices on the market at the moment: devices collecting electrocardiogram (ECG) level information via electrodes, HR monitors with belts also collecting ECG and optical HR sensors collecting photoplethysmogram (PPG) (See Figure 2). Devices collecting ECG via electrodes (e.g. FirstBeat Bodyguard 2) are very accurate (Parak & Xxxxxxxx, 2014) and capable of collecting very long measurements both regarding the amount and accuracy of the data, and they have long battery life. The drawback is that they are not waterproof and require the use of electrodes, and are probably not so convenient for everyday use. HR monitors (e.g. Suunto watches or Samsung software compatible with HR belt) use heart belt to give information on mainly exercise as it is not too much fun to wear a belt for extended periods and especially during sleep. The data quality is typically good (except during night when the belt can easily slip from the right position), and the belt can be worn during swimming also. Optical sensors (e.g. PulseOn) measure HR by illuminating the blood vessels on a person’s wrist with an LED in order to track blood flow. The measurement accuracy declines when a person is in motion, and it is generally less precise because blood flow does not provide a distinct “peak” similar to electrical signal originating from the heart (Jang, Park, Hahn, & Park, 2014). Optical sensors are thus less accurate than chest belts or ECG-level devices such as Bodyguard 2. However, precision could be acceptable (Parak & Xxxxxxxx, 2014). In addition, the battery life can be a real problem. The optical devices however would be the most comfortable for the user. More information about HR reliability is available in the report of the study performed for the Task 4.3. .
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