How to learn to float? Ways of movement in water.
As will learn to float? The ideal option - studies in the pool, it is desirable at early age and under the leadership of the skilled instructor. There are extreme ways.
Me, for example, the father on small (but for me sufficient) depth left one at a certain (safe) distance from himself. I during that time was only 5 years old, but I had passionate desire to learn to float, and I absolutely had no fear of water. It is necessary to add that business was at the sea, and salty water, as we know, has density big, than fresh. Generally, I learned to swim without any special receptions, out of self-preservation. The daughter learned to float already on fresh water, and this process was dragged out for 2 summers.
How people swim?
People thought up several different ways of fast swimming. Four of them are applied in sport. At swimming by a breast stroke the movement is carried out generally due to action of legs. Floating a crawl (or freestyle) the person lies on a water surface and moves due to action and hands, and legs. It is the most high-speed style. When swimming on a back of people serially throws out for the head of a hand and gets them water. Style butterfly stroke is applied only at competitions. That is, of course, it is possible to float so anywhere, but for this purpose it is necessary to have strong hands, when swimming this way of a hand are thrown out over water forward, and legs make blows to water up and down.
Swimming it in itself also the good type of physical exercises as when swimming almost all muscles of a body are involved, and a body partially adheres water. At the same time the minimum loading is the share of extremities, and muscles and joints well train. When swimming heart and lungs become stronger.
How animals float?
Water animals often have the membranes covering part of an extremity which increase contact with water and push force when swimming. On this type of people thought up flippers. It is much easier to float in them, and when diving it is possible to plunge on rather deep water. Many water birds have webby paws (ducks, a tea, olush) and mammals (for example, otters and kalan).
Extremities of turtles and seals changed in fins; at dolphins, whales powerful fins are located on a tail. Fishes move by means of fins too. At small shrimps and many water insects on “legs“ bunches of rigid hairs which carry out a role of fins and membranes grow. Some animals, for example, jellyfishes and squids, at the movement use the principle of reactivity. They gather water in a body cavity, and then with a force throw out it outside, receiving a powerful push which pushes them forward.
Ways of diving.
Many waterfowl and water animals get food, diving behind it deeply. It does not give to the animals having gills an inconvenience as they breathe the oxygen dissolved in water.
Mammals extract oxygen from atmospheric air, and they should develop defensors which prevent dangerous intake of gaseous nitrogen in blood. For this purpose they deeply breathe before diving. At this time oxygen sates muscles to which it is required further, and the content of air in lungs decreases. Reduction of volume of air in lungs leads to the fact that at animals buoyancy decreases, and process of immersion is considerably facilitated. All of them are capable to hold the breath for a long time.
People can there is under water so much time, on how many they can hold the breath, - about 3 - x minutes. The aqualung supplies an organism of the diver with oxygen. Invented it at the beginning of 1940 - x years the French researcher of the underwater world Jacques Yves Cousteau.
Once again we will note that to be able to float it is necessary for the person, can be even as well as to breathe. It is absolutely simple to learn it. There would be a desire.