Today I Learnt...

How long an adult's human heart rate is. It is around 60-100 beats per minute. That's for a relaxing adult like laying down on a couch, drinking some tea and reading a book by the fireplace on a cold winters night. Most of the time, a heart with a lower heart rate means that the heart is quite efficient. For example, a well-trained athlete relaxing on a couch has a heart rate of 40 beats per minute.