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    				| 1. | Why do you breathe faster and your heart rate increaases when you run? | 
| Answer» tion:When you are exercising, your muscles need extra oxygen—some three TIMES as much as resting muscles. This need means that your heart STARTS pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are ALSO taking in more air, HENCE the harder BREATHING. | |