so that you will know your own capacity
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because they need a change in heart rate.
To establish your "resting" heart rate.
Technically, everyone has their own heart rate. So in order to know someones' heart rate you must test their specific heart rate.
Your heart rate will raise if you move off the sofa so would really need to know how high and for how long the heart rate is raised. I think you mean burn calories
you shouold know
it decreased heart rate , since vagus nerve innervate parasympathetic never and we know parasympathetic nerve reduce heart rate.