Brussels (Brussels Morning Newspaper) – An intense exercise can make it harder for you to breathe. Your heart starts to beat faster as well. Have you ever wondered why the heart rate increase during exercise? The heartbeats can vary from person to person. Athletes’ making the same effort in exercising might have different heart rates. Your body needs to increase your heart rate during exercise. In this article, we will find the answer to why heart rate increases during an intense workout session.
Why Your Heart Rate Increases During Exercise
When it comes to endurance sports it is all about oxygen supply and demand. If you spend a lot of time on a certain workout, then your heart rate will increase. The oxygen is powered by an aerobic energy system. As a result, it uses oxygen and generates sustainable energy. This oxygen will enter the body and will go through your lungs and will exercise your heart. From there it gets absorbed and goes into the bloodstream. It is pumped up in the muscles by your heart.
The average heart rate of men and women depends on a lot of factors. Whenever the exercise intensity goes up, the muscles require more oxygen. This helps to power the growing workload and relax the muscles. The body needs to counter the sudden rise in oxygen demand. This is why the body responds and ends up increasing its oxygen supply.
 Norepinephrine is a chemical that is released by the sympathetic nervous system. It accelerates the muscles in your body and improves your breathing rate. This makes the bloodstream flow smoothly. As a result, the heartbeat speeds up and becomes more forceful. It sends oxygen-rich blood to the entire body including the muscles.
What Is Oxygen Uptake Kinetics Matching Supply and Demand?
The process of increasing oxygen increases because it has to meet the body’s needs. This process is called oxygen uptake kinetics. This mechanism happens and it is not in an instantaneous state. It increases the power, and this is when the body fills the gap. During anaerobic exercise, it requires oxygen to produce more energy and increase your heart rate.
During intense exercise, there is limited oxygen and it can create a lot of byproducts. As a result, your body will increase the oxygen supply and will take over the long haul. This is a strong exercise affect and makes your heart beat faster. 
When you run up the stairs you will start to breathe heavily, this is when the system starts activating. When we work out, we care more about the muscles in our arms, legs, back, or abdomen. However, the matching supply and demand of oxygen make it possible to breathe during intense workouts.
What Happens To Your Heart When You Exercise? 
Your heart is a muscular organ and it gets a workout during exercise. The full-time job of the heart is to distribute blood through the entire body. It beats harder and faster and grows resilient with time. The times your heart beats per minute varies from person to person and it should fall within the normal range. Most people’s hearts beat 60 to 80 times per minute.
When you start your exercise, the muscles start to work harder. As a result, they demand more oxygen. This demand causes the nerves to stimulate and demands the heart to beat faster. More force is used to increase overall blood flow. 
This is when the sympathetic nerves stimulate the veins and cause them to compress. These narrower veins increase the velocity and increase the blood flow in the body. This increases the blood returning to the heart.
Once you complete your exercise, your heart rate begins to slow down and goes back to its normal pace. The heart is a muscle and straining it can benefit it. The heart gets trained and works harder when you need it to. 
If you work out frequently your heart health will improve and will make it easier to distribute the blood throughout your body. A stronger heart means that it pumps more and more blood and distributes it all through the body. This results in making your heart beat less while distributing the same amount of blood. This keeps your pressure under control.
Why Does Your Heart Rate Increases When You Exercise?
Your heart is a muscle and just like other muscles of the body, it gets stronger when you exercise. When your heart gets stronger, it makes it possible to push more amount of blood with every beat. This means that the heart doesn’t have to work hard anymore to circulate adequate oxygen while you exercise. So your heart rate rises with exercise, but it doesn’t have to rise as much.
The heart rate jumps up fast while exercising and people often wonder why that happens. During an intense workout session, the body needs three or four times more than normal cardiac output. The muscles require more oxygen while you exert yourself during exercise.
Regular exercise allows your circulatory system to become more efficient too. The heart becomes capable to utilize oxygen and provide better blood flow toward the small arteries located around your heart. It also maintains an improved cholesterol profile and maintains blood pressure.
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Which Exercises Increase Your Heart Rate the Most?
Aerobic exercises like brisk walking and running increase your heart rate the most. Swimming and Cycling is also intense exercise that can speed up your heart rate. Jumping rope is also a great way to boost your heart rate. During a cardiovascular exercise, the heart needs to beat faster as it needs to supply more oxygen to your muscles.
However, resistance training also helps to make the heart rate faster. When you lift at a fast pace and then take short breaks between the exercises it helps to exercise your muscles easily. Exercising every day improves your stamina and allows your heart to beat normally. The heart also gets used to heavy breathing and maintains the heart rate.

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