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Help (for my science fair project)!!?
In my experiment i found out that the number of heartbeats/min. after we ran for 3 times was at its highest the second time. is there a scientific explanation for that? pleaaase help!!!!!
Answer
The first run would have made your heart beat fast because it was beating above its normal beat the second time the heart rate would increase as though you would be having a workout and the third would have slowed the heart rate down a little due to the heart ading itself to your workout
