Question

Please help I have to do something but do not get what these words mean.
Post heart rate
Duration

Answer 1

It would have helped if you'd given us a clue about your subject.

Let me guess. Is it health or P.E.?

Post means after. I'll guess that the post heart rate means the heart rate after the subject has exercised. Duration might be how long this rate continues when the subject is resting.

http://healthyliving.azcentral.com/normal-values-post-exercise-heart-rates-7220.html

Answer 2

okay thanks