Q:

What happens inside our bodies when we exercise?

A:

Quick Answer

During exercise, the muscles pull oxygen out of the bloodssstream, blood vessels dilate for increased blood flow, the heart and diaphragm work harder, and the body starts to sweat to remove heat from the body. On the molecular level, the body creates adenosine triphosphate (ATP) to provide energy to the exercising muscles.

Know More
What happens inside our bodies when we exercise?
Credit: Lionel Montico hemis.fr Getty Images

Full Answer

During exercise, cells inside the muscles split the muscles' ample supply of glycogen into glucose, which then is split again to form ATP and lactic acid; this process requires about 12 different chemical reactions. ATP provides energy to the muscles' cells. The lactic acid, which is a by-product of these chemical reactions, causes muscles to ache and must be removed via the bloodstream.

Because muscles pull oxygen out of the bloodstream during exercise, the body must respond by increasing the blood flow from the heart and diverting blood flow from other organs to the working muscles. For instance, the digestive system typically slows down during strenuous exercise. As a working muscle uses up its store of ATP, it releases chemical by-products that cause blood vessels to dilate, thus increasing oxygen flow throughout the body. Blood vessels to the skin also dilate, allowing heat to dissipate. In addition, sweat glands activate during exercise to produce sweat. As the sweat evaporates upon contact with the air, it also helps to lower the body's temperature through the dissipation of built-up heat.


Is this answer helpful?

Similar Questions

  • Q:

    What type of exercise is considered best to strengthen the heart and blood vessels?

    A:

    The best exercise to strengthen the heart and blood vessels is cardiovascular or aerobic exercise. According to MedicineNet, cardiovascular exercise is defined as steady physical activity using large muscle groups. Regular aerobic activity helps improve circulation and the body's oxygen use, reduces heart failure symptoms, lowers blood pressure and increases endurance.

    Full Answer >
    Filed Under:
  • Q:

    How does exercise affect your heart and lungs?

    A:

    Exercise increases the blood flow in one's heart and strengthens the heart muscles. During exercise more blood gets pumped into the lungs to enable increased oxygen absorption. This oxygen is then carried to the body muscles engaged in exercise, usually the legs and arms. When a person exercises, both his heart rate and his breathing rate increase considerably, making his heart and lungs work harder.

    Full Answer >
    Filed Under:
  • Q:

    Why is exercise important for teenagers?

    A:

    According to WebMD, exercise benefits teenagers by toning the body, strengthening muscles and bones, encouraging a healthy weight and promoting healthy skin. It also improves sleep and mood through triggering endorphins, according to TeensHealth.

    Full Answer >
    Filed Under:

Explore