Ideal exercise is an excellent way to get overall health. It is more effective for people who lose weight than other sports, and it is also of great help to the heart and lungs. Swimming is also often used as a treatment for stroke or muscle problems. Swimming skills are rich and varied, and even people who don't like to take part in sports at ordinary times can get great pleasure from swimming.
Swimmers often have enviable bodies, well-proportioned bodies and beautiful curves. This is because the resistance of water is 800 times greater than that of air when swimming. Moreover, when people swim in the water, they paddle with their arms and kick the water with their legs at the same time, and all the muscles of the whole body participate in the activities. The faster the swimming speed, the greater the resistance, which can reflexively cause the cerebral cortex to mobilize more muscle fibers to participate in sports, and promote the whole body muscles to get good exercise, especially the pectoralis major, deltoid muscle, triceps muscle and upper body back related to upper limb swing stroke. During swimming, periodic paddling and paddling are alternately tense and relaxed, and long-term exercise will make muscles soft and elastic.
In addition, when swimming, people's mouths inhale on the water surface, and the humidity of the water surface is as high as 90%, which can clean and soften the respiratory tract and alveoli, so it is very beneficial to the human body, especially smokers.
Swimming has moderate strength and intensity, good flexibility, high coordination, strong sense of rhythm and wide range of joint activities, which is more conducive to the longitudinal growth and development of bones, muscles and ligaments and meets the needs of children's growth.
Swimming and paddling have obvious effect on scapulohumeral periarthritis. When swimming, water plays a hydrotherapy role in massaging human muscles. It has good therapeutic effect on contusion and arthritis.
Sticking to swimming exercise can not only improve the functions of respiratory system and blood circulation system, but also improve the strength, speed, endurance and flexibility of muscles in all joints of the whole body. Thereby effectively enhancing physical fitness.
As the saying goes, "too much is too late", there must be a limit to everything, and swimming is the same. Although swimming can play a good role in fitness, you can't stay in the water all the time. Swimming in the water for a long time, especially in very cold water, can easily cause harm to the body.
This is because water transfers heat quickly, and the human body is easy to dissipate heat in water. In order to avoid excessive heat loss, skin blood vessels will produce protective reflex, which will make skin blood vessels contract. Skin generally has three reaction periods to cold stimulation. The first stage: after entering the water, stimulated by cold, the skin blood vessels contract and the skin color is pale. The second stage: after staying in the water for a certain period of time, the blood flow on the body surface is enlarged, the blood circulation is accelerated, the heat is increased, the skin turns from pale to reddish, and the skin turns from cold to warm, so that people can maintain activities in the water for a period of time. The third stage: the residence time is too long, the heat generated by the body is lower than the heat dissipation of the human body in the water, and the body temperature regulation function is destroyed. At this point, the arteries in the skin will contract and the venules will expand, so that the blood will stagnate in the subcutaneous veins, resulting in blue skin, black lips, goose bumps and chills. In this case, you must go ashore immediately, dry the water on your body, bask in the sun, and get dressed as soon as possible after the weather is warm to prevent colds, tachycardia, muscle strain and other diseases. And long-term exposure to swimming can also cause sunburn, or cause acute dermatitis, also known as sunburn. In order to prevent sunburn, it is best to use an umbrella to shade the sun after landing, or rest in a cool place, or use a bath towel to protect the skin, or apply sunscreen to exposed parts of the body.
Experts suggest that the bad habit of swimming for a long time must be changed, and the swimming time should generally not exceed 1.5-2 hours. Only by swimming correctly can you swim out of health and vitality!
Tips on healthy habits:
Swimming and fitness have some advantages:
1. Enhance the ability to adapt to temperature changes and resist cold;
2. Enhance cardiopulmonary function. People who swim for a long time have better cardiopulmonary function than ordinary people;
3. Plastic body with beautiful appearance;
4. Calcium supplementation and skin care.