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After exercise, you body has an "Oxygen Debt" in which the muscles are filled with lactic acid, a byproduct of anaerobic respiration, so the heart pumps at a fast speed until all the lactic acid is removed and the Oxygen Debt is filled.

2 Responses

1. Jody Says:
   December 11th, 2009 at 2:38 am

   Because you’re out of shape. One of the hallmarks of people in athletic shape is that their pulse returns to normal relatively soon after the cessation of exercise.
   References :

2. TonyDCM Says:
   December 11th, 2009 at 3:15 am

   After exercise, you body has an "Oxygen Debt" in which the muscles are filled with lactic acid, a byproduct of anaerobic respiration, so the heart pumps at a fast speed until all the lactic acid is removed and the Oxygen Debt is filled.
   References :
   MD

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