Size Normal Heart Rate

Size Normal Heart Rate

Heart rate is a contraction of the lower heart chamber that pumps blood throughout the body. Based on the results of scientific studies in medicine, heart rate occurred because of the irregular electrical impulses generated from one network to the right atrium of the heart walls. This network is called the SA node (SA node).

Heartbeat rhythm is affected by cardiac neural state that is part of the autonomic nervous system (autonomic nervous system), the nervous system associated with the activities of the body and works under consciousness.

The autonomic nervous system is formed from two types of nerves, namely the sympathetic and parasympathetic nerves. These nerves originate from the spinal cord and brain can send impulses to the SA node or other parts of the heart.

Sympathetic nerves play a role increasing pulse rate. These nerves are usually active when the body responds to danger or when we are in a state of fear or rage, a strenuous, or other activities that use the power of emotion. As with the parasympathetic nerves, these nerves contribute to lower the rate of heart beats.

In addition influenced by the autonomic nervous system, heart rate is affected by chemicals or hormones present in the bloodstream. Several hormones and chemicals that affect heart rate, among others, are as follows.
The hormone adrenaline. This hormone is produced by the adrenal glands found in the kidney. When I was in a state of stress, adrenal hormone production will increase so that the stress state of the heart rate also increases.
Thyroid hormone. The main hormone that helps maintain metabolic processes is produced by endocrine glands located in the neck. These hormones can increase your pulse rate.
Chemicals such as calcium, sodium, and potassium may also increase heart rate.

What is the size of a normal heart rate?

Normal pulse rate for adults at rest (no physical activity) is about 70 beats per minute.

However, the heart rate for children and infants in a normal state more quickly than adults. The children had a normal heart rate around 100 beats per minute, while the baby is 120 beats per minute.

Basically, the activities of a routine exercise can make your heart stronger so that the sportsman in your pulse rate at rest was lower than people who never exercise, which is about 40 to 60 beats per minute.

This occurs because the heart is strong allowing adequate blood supply throughout the body even though only a relatively small rate.