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What is Heart Rate?#

Heart Rate (HR), also known as pulse, is the number of times a person's heartbeats per minute. 1

A normal person's resting heart rate is typically 50-90 BPM. 2

In some real-life scenarios, the heart rate is calculated over a much shorter period of time in order to obtain real-time heart rate changes. 3


PPG (photoplethysmography) sensors on the Flowtime headband use light-based technology to acquire the heart rate, which is accurate when they have good contact with the skin.

  1. Ananya Mandal. What is Heart Rate? News-medical.(2019-06-05).
  2. Nanchen, David. (2018). Resting heart rate: What is normal?. Heart. 104. heartjnl-2017. 10.1136/heartjnl-2017-312731.
  3. Block, Frank. (1994). What is heart rate, anyway?. Journal of clinical monitoring. 10. 366-70. 10.1007/BF01618415.