Summary. While the left side of the heart becomes too weak to squeeze regular volumes of blood out of the heart when it pumps, this is known as systolic heart failure. Diastolic heart failure develops when the left side of the heart becomes too rigid to relax and fill with blood regularly.
True it helps you to get exersise just like your bones and your muscles
Answer:
You repeated the two paragraphs, 3 times. and that is the answer :D
Depending on when you get up for school the average time a teenager should get to sleep is somewhere between 9-14 hours so just make sure you get a proper amount of sleep
