Tiny fluctuations in the time between each beat of your heart can provide clues about how much stress your body is experiencing.
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Trying a new exercise routine? Strapping on a new wearable monitor? An expert in human physiology explains the ins and outs of your heart rate and why it’s a valuable number to understand.
The adult heart rate should be between 60 and 100 beats per minute,but lots of factors can affect this.
