The heart is a big muscle, and every muscle needs regular exercise to be healthy and prevent destruction.  Of course, it means aerobic sports that can give a uniform rhythm to the heart.
Dr. Alireza Abbasi, a well-known figure in sports science in the world, said: “In a young adult athlete during heavy exercise, cardiac output may increase from the normal state of 6 liters per minute to 25 liters per minute or more, and oxygen consumption increases from 250 milliliters per minute to 1500 milliliters per minute.”
The heart rate can increase from the normal state of 72 beats per minute to 180 beats per minute.
Abbasi added: “If you exercise regularly for 40 minutes 3-4 days a week, you will always have a healthy heart.  Because regular exercise, like beta-blocker drugs, makes it unnecessary to take drugs.  If you are looking to reduce blood pressure and cholesterol, do 40 minutes of moderate to intense aerobic exercise 3 to 4 times a week.”  
Aerobic exercise (walking, swimming), and strength training (weight training and resistance training) are great for heart health.
It increases the ability of the muscles and the heart does not need to work hard. 
Exercise helps smokers to quit smoking as it has a mechanism in the body that strengthens your will.  Exercise regulates hormones and reduces stress.  Stress is one of the factors that can put pressure on the heart.
Regarding asthma patients, exercise is suitable for all ages.
Therefore, according to the condition and severity of the disease, exercise will be prescribed. 
Asthma patients can exercise, but they should consult a doctor before exercising. 
In this case, exercise helps the heart to improve the muscles’ ability to extract oxygen from the blood.  Any type of exercise is not suitable for the heart and can even be harmful, such as long-term running, or exercising with pain.
“I recommend pregnant women to exercise for 30 minutes a day, although many experts do not think it is advisable, but exercise helps the health of the baby’s heart and blood vessels,” he added.
This scientific figure in the field of sports pointed out the size of the heart of professional athletes and added, that the size and volume of the heart are one of the hallmarks of professional athletes. 
Their pumping ability is high, and this increases the delivery of oxygen to body tissues during rest and activity.  These are due to the increase in stroke volume of the heart. 
An increase in filling means that the heart expands. 
“I advise professional athletes not to give up high-intensity sports immediately after retirement, this can lead to serious and irreparable injuries.” – Dr. Alireza Abbasi
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