75% of the earth's surface is covered by sea water, while people living in reinforced concrete are full of fear and longing for the mysterious underwater world, and they have been eager to uncover its mysterious veil for thousands of years. In these long years, diving has developed slowly. Nowadays, diving is a very popular leisure sport in foreign countries.
Diving is a kind of physical activity under high pressure. It is different from ordinary swimming, but a kind of skill exercise. The advantage of diving is not only that the strange world in the water brings great enjoyment to people's spirit, but also that it can make people broad-minded and open-minded. Regular diving can develop the muscles of all parts of the body, improve strength, speed, endurance, flexibility and other physical qualities, at the same time, it can also cultivate people's courage, tenacity, cooperation and prudence.
"Half the work with double results"
The environment of water area is very different from that of land. The research shows that the resistance of human activities in water is 883 times of that in air. The huge resistance brought by water will increase the difficulty and total amount of exercise, making you use more than 6 times the strength to complete a certain action, so as to achieve the fitness effect of twice the result with half the effort.
In addition, the heat transfer capacity of water environment is 28 times that of air, and even staying still in water will consume a lot of energy. Like a hot egg, it's much faster to cool it in water than in air. Therefore, a person's energy consumption of 20 minutes of exercise in water is equivalent to more than one hour of exercise at the same intensity on the ground. Exercise in water for 40 minutes can consume 400 calories, easily achieve the purpose of exercising the whole body, and will not cause muscle pain.
"Not easy to get hurt"
Exercise on land, due to the role of gravity, joints and joints pull tight friction, easy to cause sports damage. In the water, the buoyancy can reach 85% - 90% of the body weight, greatly reducing the gravity, reducing the pressure on joints, bones and muscles, making them less vulnerable to injury, and reducing the pain of movement.
The buoyancy of water can also improve flexibility, making the movement of all joints of the body more flexible and free. Sports that can't be done on land, including muscles that can't be practiced, can be easily taken down in water. By imitating the swimming posture of fish, we can stretch every part of the body evenly, which has excellent fitness effect. Body building, diving is definitely the best choice.
"Have a beautiful skin"
More and more women like new challenges. In fact, diving has a unique beauty massage effect on women. People do not sweat when they exercise in water, which reduces the stimulation of salt in sweat to skin. At the same time, the skin becomes red and hot after the beating of water and waves, which makes the capillary expand, can improve the circulation function of subcutaneous blood vessels, has a special massage effect, can reduce the relaxation and aging of the skin, and make the skin bright, smooth and elastic.
Leisure divers use pure air compressed into the bottle after multi-level purification, which is equivalent to "washing" the lung for urban people suffering from air pollution. Diving has been very popular in mm in Japan, because the deeper you dive, the purer the oxygen you breathe from the bottle. High purity oxygen can restore fatigue and reduce skin wrinkles. The beauty effect is obvious!
"Decompression and anticancer"
