What Happens to Your Heart When You Exercise?

Posted on May 4, 2015
exercising helps your heart

When we workout, we typically think about muscles in our arms, legs, back or abdomen. However, these aren’t the only muscles that get stronger with regular exercise.

Your heart, which is a muscular organ, gets a workout during exercise, too. Your heart’s full-time job is to distribute blood throughout your entire body. When it beats harder and faster, it can grow stronger and more resilient.

When you’re stationary, your heart should beat between 50 to 100 times per minute to fall within the normal range. To narrow this down a little, most people’s hearts beat between 60 to 80 times per minute.

When you start your exercise, your muscles will start to work harder and demand more oxygen. This demand will cause sympathetic nerves to stimulate the heart to beat faster and with more force to increase overall blood flow. The sympathetic nerves will also stimulate the veins, causing them to compress. These narrower veins will increase the velocity at which blood flows through your body. This will ultimately increase the amount of blood returning to the heart.

How fast your heart pumps during exercise depends on numerous factors such as:

  • Your age
  • Your fitness level
  • Intensity of the workout
  • Your heart’s overall strength

Cardiac output is the rate of blood pumped by the heart. You can calculate this output by multiplying the rate at which the heart beats (heart rate) by the volume of blood the heart ejects with each beat (stroke volume). When your heart is pumping at full force, the cardiac output is about 20-25 liters per minute—compared to 5 liters a minute for a heart at rest.

Once you are done with your exercise, your heart rate will begin to slow to a normal pace.

Since your heart is a muscle, it can benefit from being strained to a certain degree. Frequent exercise will cause your heart to grow stronger, making it easier for it to distribute blood throughout your body. A stronger heart means that each time your heart beats, it pumps more and more blood throughout you body. This allows your heart to beat less, while still distributing the same amount of blood. All of this can keep your blood pressure under control.

 

To learn more about the Erlanger Cardiovascular Team, click here. To contact us or make an appointment with a specialist, call 423-778-2564

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