Human Body
Exercise has a very positive meaning on human health. In children, teenagers and youth, it can promote the growth and development of the human body; in the prime of life, it can keep people full of energy and physical strength, so as not to cause premature aging; in old age, it can prevent the premature degeneration of human cells.
Make our life full of vitality, which is conducive to people's cultivation of optimistic emotions; people eliminate all worries during exercise, which has a good effect on the metabolism of various internal organs and the whole body. This article introduces the positive effects of fitness on the human body from seven aspects influences.
Make our life full of vitality, which is conducive to people's cultivation of optimistic emotions; people eliminate all worries during exercise, which has a good effect on the metabolism of various internal organs and the whole body. This article introduces the positive effects of fitness on the human body from seven aspects influences.
1. Fitness exercise can enhance the function of human motor system
The motor system is mainly composed of bones, cartilage, joints and skeletal muscles, and its main function is to act as a scaffold, protection and movement. Whether the motor system of the human body is strong, solid and perfect has a significant impact on the strength of the human body. For example, bones and muscles support and protect the human body.
It not only provides the possibility for the health, growth and development of internal organs, such as heart, lung, liver, kidney, brain, and spinal cord, but also protects these organs from external damage.Bone, cartilage, and articular skeletal muscle are the organs of movement of the human body. The quality of bone, the firmness and flexibility of joint connections.
The magnitude and duration of muscle contraction, etc., largely determine the exercise capacity of the human body. Adolescents often engage in physical exercise, which can promote bone growth, make bones longer, thicker in transverse diameter, increase bone density, and increase bone weight. Regular exercise can also thicken muscle fibers, increase muscle cross-sectional area, and strengthen muscle contraction and tension, thereby continuously improving muscle strength and endurance.
It is determined that the muscle weight of the average person accounts for about 40% of the body weight, while the muscle weight of the athletes who exercise regularly can reach 45% to 50% of the body weight. Physical activity is also an important factor in weight regulation, resulting in significant changes in body composition, the extent of which varies depending on the intensity and duration of training.
The normal heart rate is about 70 beats/min, while those who often participate in sports are about 50 beats/min, and the beating is strong. This shows that through physical exercise, the myocardium can be developed, the cardiac contractility can be strengthened, the stroke volume can be increased, and the heart can complete the required workload with fewer beats, which helps to increase the rest time of the heart and reduce the heart itself. fatigue.
2.Increase in stroke volumePeople who often participate in fitness have higher stroke volume than normal people whether in quiet or exercise state, especially in exercise state, the increase in stroke volume is more obvious. This change enables the human body to have a larger cardiac output during fitness to meet the needs of the body's metabolism.
It not only provides the possibility for the health, growth and development of internal organs, such as heart, lung, liver, kidney, brain, and spinal cord, but also protects these organs from external damage.Bone, cartilage, and articular skeletal muscle are the organs of movement of the human body. The quality of bone, the firmness and flexibility of joint connections.
The magnitude and duration of muscle contraction, etc., largely determine the exercise capacity of the human body. Adolescents often engage in physical exercise, which can promote bone growth, make bones longer, thicker in transverse diameter, increase bone density, and increase bone weight. Regular exercise can also thicken muscle fibers, increase muscle cross-sectional area, and strengthen muscle contraction and tension, thereby continuously improving muscle strength and endurance.
It is determined that the muscle weight of the average person accounts for about 40% of the body weight, while the muscle weight of the athletes who exercise regularly can reach 45% to 50% of the body weight. Physical activity is also an important factor in weight regulation, resulting in significant changes in body composition, the extent of which varies depending on the intensity and duration of training.
2.The effect of exercise on the cardiovascular system
Physical exercise can effectively improve the function of the blood circulatory system. Engaging in physical activity can make the myocardium develop, thicken the heart wall, increase the volume and volume of the heart, enhance the elasticity of blood vessels, and increase the output per beat and per minute ie, the amount of blood excreted in one heartbeat and one minute.The normal heart rate is about 70 beats/min, while those who often participate in sports are about 50 beats/min, and the beating is strong. This shows that through physical exercise, the myocardium can be developed, the cardiac contractility can be strengthened, the stroke volume can be increased, and the heart can complete the required workload with fewer beats, which helps to increase the rest time of the heart and reduce the heart itself. fatigue.
1.Sinus bradycardia
Long-term low-intensity physical activity can slow down the heart rate of the human body at rest, and the body's adaptability to fitness activities in the presence of sinus bradycardia The decrease in heart rate can make the heart have a longer rest period to reduce myocardial fatigue.2.Increase in stroke volumePeople who often participate in fitness have higher stroke volume than normal people whether in quiet or exercise state, especially in exercise state, the increase in stroke volume is more obvious. This change enables the human body to have a larger cardiac output during fitness to meet the needs of the body's metabolism.
3. The effect of fitness exercise on blood components
During physical exercise, the requirements of the muscles for blood circulation are greatly improved, the myocardial contraction is strengthened, the intravascular pressure is increased, the blood flow is accelerated, the coronary arteries are dilated, and the absorption and utilization of energy by the myocardium are greatly improved. All of these depend on the improvement of myocardial excitability and promote a series of chain reactions in the vascular system to better ensure muscle activity.
Studies have shown that most of the capillaries in the muscles are not open when they are at rest, and there are 31 to 270 capillaries per square millimeter of muscle cross-section, and it can increase to 2500 to 3000 during exercise. Studies have also shown that coronary blood flow in healthy adults accounts for 8% to 9% of cardiac output. During exercise, when the oxygen uptake is increased by 2 to 2.5 times, the coronary blood flow can reach 5 to 7 times that of the resting state, which greatly improves the blood supply to the myocardium.
Studies have shown that most of the capillaries in the muscles are not open when they are at rest, and there are 31 to 270 capillaries per square millimeter of muscle cross-section, and it can increase to 2500 to 3000 during exercise. Studies have also shown that coronary blood flow in healthy adults accounts for 8% to 9% of cardiac output. During exercise, when the oxygen uptake is increased by 2 to 2.5 times, the coronary blood flow can reach 5 to 7 times that of the resting state, which greatly improves the blood supply to the myocardium.
4. Exercise can improve the function of human nervous system
The human body is a whole, which is mainly controlled by the nervous system and coordinates the activities of various organs in the whole body, including thinking, physiological functions and actions. During physical exercise, it seems that only the muscles are active, such as running, on the surface, only the muscles of the legs.
Contracting and the hands are swinging. But at this time, the heartbeat has accelerated, the blood flow has accelerated, and the breathing has become rapid. These are all changes in the internal environment of the body. From the external environment, factors such as temperature, venue, audience, and opponents of the game all have an impact on the body. The nervous system needs to respond quickly and correctly to the changes caused by various internal and external complex factors.
Physical exercise requires the command of a complete and responsive nervous system. On the contrary, physical exercise also enhances the command and coordination ability of the nervous system, which can better adapt to various environments and improve the functional defects of certain organs to promote and improve the development of various tissues and organs to higher, stronger and more perfect physiological functions. The best way to protect and improve the command and coordination function of the nervous system is to strengthen exercise.
Contracting and the hands are swinging. But at this time, the heartbeat has accelerated, the blood flow has accelerated, and the breathing has become rapid. These are all changes in the internal environment of the body. From the external environment, factors such as temperature, venue, audience, and opponents of the game all have an impact on the body. The nervous system needs to respond quickly and correctly to the changes caused by various internal and external complex factors.
Physical exercise requires the command of a complete and responsive nervous system. On the contrary, physical exercise also enhances the command and coordination ability of the nervous system, which can better adapt to various environments and improve the functional defects of certain organs to promote and improve the development of various tissues and organs to higher, stronger and more perfect physiological functions. The best way to protect and improve the command and coordination function of the nervous system is to strengthen exercise.
5.The effect of fitness exercise on the physiological function of the digestive system
During physical exercise, muscle activity is significantly enhanced, and sufficient energy supply is required to require the digestive system to strengthen activities and secrete more digestive juice; exercise promotes gastrointestinal blood flow, which is conducive to absorbing more nutrients for the body to use.
Therefore, under the influence of physical activity, gastrointestinal function has been further strengthened and improved. After exercising, the body consumes a lot of energy and urgently needs to be supplemented. At this time, people often feel hungry, their appetite is significantly increased, and their digestion and absorption functions will be significantly enhanced.
If you persist in exercising for a long time, thin people will gradually gain weight and gradually increase their muscles. For those with indigestion and gastrointestinal disorders, exercise will also play a role that drugs cannot.
6. The effect of fitness exercise on the physiological function of the urinary system
The non-gaseous metabolic products in the body are mainly excreted through the urinary system. During physical activity, the activities of the organs of the whole body are strengthened. Due to the vigorous metabolism, a large amount of waste is produced, which is filtered by the kidneys through the blood circulation and excreted in the urine, such as lactic acid (fatigue product), elements, urinary creatinine and fat. metabolites, etc.
Under the control of the central nervous system, the various systems of the whole body always coordinate and restrict each other in this way, maintaining a constant dynamic balance. During exercise, a large amount of water is lost from the skin and respiratory tract, and a large amount of salt is also excreted in sweat. At this time, the amount of urine is reduced.
The kidneys have a regulatory function. When there is too much of certain substances in the body (such as water), the amount of urine increases, but when it is insufficient, it will be reabsorbed and excreted less. This auto-regulation function of the kidney, it is this filtering, reabsorption, and excretion activity that enhances renal function. Physical exercise enhances the function of the kidneys to maintain the acid-base balance and fluid balance in the body, and is of great significance for expelling a large amount of waste generated during metabolism.
Under the control of the central nervous system, the various systems of the whole body always coordinate and restrict each other in this way, maintaining a constant dynamic balance. During exercise, a large amount of water is lost from the skin and respiratory tract, and a large amount of salt is also excreted in sweat. At this time, the amount of urine is reduced.
The kidneys have a regulatory function. When there is too much of certain substances in the body (such as water), the amount of urine increases, but when it is insufficient, it will be reabsorbed and excreted less. This auto-regulation function of the kidney, it is this filtering, reabsorption, and excretion activity that enhances renal function. Physical exercise enhances the function of the kidneys to maintain the acid-base balance and fluid balance in the body, and is of great significance for expelling a large amount of waste generated during metabolism.
7. The influence of fitness exercise on psychology and sleep
Through long-term aerobic exercise research, it has been found that exercise can effectively improve the sleep quality of the human body, increase people's social communication ability, enhance the sense of adaptability, confidence, happiness and moral cultivation to life; eliminate and alleviate depression.
Emotional disorders such as tension, anxiety, irritability, hostility, etc., make athletes full of self-confidence and fun in life, thereby improving the physical and mental health and quality of life of the human body.
Emotional disorders such as tension, anxiety, irritability, hostility, etc., make athletes full of self-confidence and fun in life, thereby improving the physical and mental health and quality of life of the human body.
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