First of all, fitness exercises promote health in an all-round way.
The human body is moving as an organic whole. Cardiovascular, respiratory, vascular, endocrine, digestive, urinary and sensory organs coordinate with each other under the unified command of the nervous system, which promotes the corresponding skills of various organs of the human body to adapt to changes and the horizontal coordination between the functions of various organs, thus producing good health care effects.
(1) Fitness exercise improves the function of cardiovascular system: Regular exercise may make the shape, function and adjustment ability of human cardiovascular system have good adaptability.
Quiet heart rate drop: Adult quiet heart rate is generally 75 beats/min. After long-term physical exercise, the heart rate drops to < 60 beats/min, which is a good physiological change.
Exercise-induced myocardial hypertrophy: Exercise can cause myocardial cell hypertrophy, cardiac wall thickening, myocardial contractility enhancement and stroke output increase.
Improvement of cardiovascular regulation function: doing quantitative load exercise means that the heart mobilizes quickly, responds little and recovers quickly. When doing maximum load exercise, the heart mobilizes quickly, with a large range and recovers quickly.
(B) physical exercise to improve respiratory function
Aerobics promotes the development of respiratory muscles: the main manifestations are the hypertrophy of ventilator, the increase of vital capacity and vital capacity, and the obvious decrease of residual gas in alveoli after each exhalation.
Fitness exercise improves the gas exchange efficiency of alveoli: Fitness exercise refers to the increase of breathing depth and frequency, and the gas exchange pressure difference between alveolar wall and capillary blood around alveoli increases, thus improving the gas exchange efficiency.
The mechanism of body-building exercise deepening and accelerating breathing: ① Exercise stimulates proprioceptors, which deepens and accelerates blood reflexivity. ② The increase of metabolites during exercise can stimulate the central and peripheral chemoreceptors, causing further increase of respiration. ③ Exercise leads to the increase of body temperature, and the thermoregulation mechanism regulates body temperature by increasing gas exchange.
(3) Body-building exercises improve blood transport capacity: During body-building exercises, the whole body blood circulation is accelerated; Long-term scientific and systematic physical exercise will improve the ability of blood to transport oxygen, carbon dioxide and nutrients, thus promoting human health.
Physical exercise increases the number of red blood cells.
Physical exercise can increase the concentration of hemoglobin.
(4) Physical exercise maintains the steady state of immune system: Physical exercise is of great significance to the functional steady state of cellular immunity and humoral immunity. Moderate exercise intensity and load can improve immune function and reduce the risk of infection. However, long-term intensive exercise training can inhibit immune function. Therefore, the intensity and load of fitness exercise is the key to determine whether exercise promotes health.
Fitness exercise to improve the function of motor organs.
The diaphysis becomes thicker, the bone density increases, and the trabeculae are arranged closely and orderly, which enhances the anti-fracture ability of bones.
The selectivity of muscle cells increases, and the protein in muscle increases, which is manifested by the increase of muscle volume and muscle strength.
Connective tissue between cells thickens and capillary density between muscle cells increases.
(6) Physical exercise can improve glucose and lipid metabolism and reduce the risk and severity of obesity-related diseases.
Physical exercise can reduce the risk of obesity and atherosclerosis.
Physical exercise can reduce the risk and severity of fatty liver.
Physical exercise can reduce the risk and severity of diabetes.
(7) Body-building exercises can delay aging by regulating the function of nerve-endocrine-immune system.
Fitness exercise can delay aging (androgen and estrogen) by affecting the level of sex hormones.
Fitness exercise can delay aging by improving immune function.
(8) Fitness exercises promote the function of digestive system: As the saying goes, "You can live ninety-nine if you take a hundred steps after a meal." There is no shortage of science. Walking or doing some slight activities after meals can strengthen gastrointestinal peristalsis and promote its mechanical digestion; Can enhance the secretion of digestive juice and the activity of digestive enzymes; It can also accelerate the local blood circulation of gastrointestinal tract, take away absorbed nutrients, and avoid affecting gastrointestinal digestion and absorption due to accumulation of nutrients.
(9) Physical exercise improves mental state.
Fitness exercise can improve people's emotional state, directly bring people pleasure and joy, and reduce tension and anxiety; Can enhance people's psychological stress ability; Fitness exercise can also coordinate interpersonal relationships, expand social interaction and improve social adaptability.
To sum up, long-term scientific fitness exercise will comprehensively improve the functions of various organs and systems of the human body, improve the adaptability of the human body to environmental changes, and improve emotions, thus promoting health, delaying aging, and preventing and treating obesity, hypertension, fatty liver, atherosclerosis and other related diseases.
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