EVERYDAY SCIENCE

Detailed explanation-1: -During exercise, your heart typically beats faster so that more blood gets out to your body. Your heart can also increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps.

Detailed explanation-2: -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.

Detailed explanation-3: -Muscles use oxygen to create the fuel needed for the work involved in exercise. Your muscles need more fuel when you exercise, and that’s why your heart rate, or pulse, increases. After exercise, your heart rate returns to its normal or resting rate fairly quickly.

Detailed explanation-4: -When the heart beats too fast, it may not pump enough blood to the rest of the body. As a result, the organs and tissues may not get enough oxygen. In general, tachycardia may lead to the following signs and symptoms: Sensation of a racing, pounding heartbeat or flopping in the chest (palpitations)

Detailed explanation-5: -Examples: Brisk walking, running, swimming, cycling, playing tennis and jumping rope. Heart-pumping aerobic exercise is the kind that doctors have in mind when they recommend at least 150 minutes per week of moderate activity.