1. The heartbeat times of long-distance runners are determined by their own physical condition, exercise intensity and exercise years. The average long-distance runner's normal heartbeat should be 60 beats per minute. The normal heartbeat of some athletes can be slowed down to 36-40 beats per minute.

2. This is due to the athlete's long-term long-distance running, the long-term compensatory function of the heart is strengthened, the myocardial fibers become thicker, the function of the heart is correspondingly increased, the contraction is more powerful, the heart volume is also increased, and the stroke output is increased. Due to the increase of blood supply, the heart can meet the body's demand for oxygen without beating fast.

3. So the heartbeat of long-distance runners will slow down, which is called sinus bradycardia in exercise physiology. The longer the exercise time, the higher the exercise intensity and the more obvious it is. This phenomenon is of great benefit to long-distance runners: due to sinus bradycardia and prolonged diastolic period, the myocardium can be fully rested to avoid overwork.

Extended data:

Abnormal change related factors

Heart rate changes are closely related to heart disease. If the heart rate is greater than 160 beats/min, or less than 40 beats/min, it is more common in patients with heart disease. As usual, accompanied by palpitation, chest tightness and other discomfort. It should be examined in detail as soon as possible in order to treat the cause.

1, tachycardia

When adults are at rest, the heart rate exceeds 100 beats/min (generally not more than 160 beats/min), which is called sinus tachycardia. It is common after excitement, excitement, smoking, drinking or drinking strong tea or coffee, or under pathological conditions such as infection, fever, shock, anemia, hypoxia, hyperthyroidism, heart failure, or when atropine is used.

2, bradycardia

When the adult's heart rate is lower than 60 beats/min (generally more than 45 beats/min), it is called sinus bradycardia, which can be seen in healthy people and athletes who have been engaged in heavy physical labor for a long time; Or in hypothyroidism, intracranial hypertension, obstructive jaundice and excessive digitalis, quinidine or propranolol.

Sick sinus syndrome and atrioventricular block should be considered if the heart rate is lower than 40 beats/min. If the pulse intensity is uneven and the pulse rate is less than the heart rate, atrial fibrillation should be considered.

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