How many of us can swim? You don't think it's very important? Well, yes, we know how to walk and okay. But we are born with this skill - the ability to swim, only then we forget about it with lifeguard certification near me.

In the summer, in the heat of the people drawn to the water. And it is advisable to enter the water, knowing how to swim. The ability to stay in the water, I think, is a necessary life skill. Imagine this situation - you are in a boat at pleasure, and you suddenly fall into the water or a drowning ship occurs. Say - maybe? Yes, but even a small percentage of the probability of such or a similar situation could cost a lifetime.

Almost all representatives of the animal kingdom can swim, including such as the hedgehog, cow and even the mole. Many animals dive in search of food or hide from enemies.



How do people swim?

People have several different ways to swim fast. Four of them are used in sports. When swimming with breaststroke, movement is mainly caused by the action of the legs. A person swimming in a crawl (or freestyle) is on the water and moving due to the action of both arms and legs. This is the fastest style. When swimming in the back, a person alternately throws his hands behind his head and spreads water on them. The bitterer style is only used in competitions. That is, of course, you can swim like anywhere, but for this you need to have strong hands, when swimming this way, the arms are thrown above the water with American lifeguard association.

Self -swimming is also a great type of physical exercise, as almost all the muscles of the body are involved in swimming, and the body itself is partially adhered to water. At the same time, the foot has less load, and the muscles and joints train properly. When swimming, the heart and lungs are strengthened.

How do animals swim?

Aquatic animals often have membranes that cover part of the foot, which increases contact with water and the strength of the shock when swimming. With this type of person comes the slippers. Swimming in them is easier, and when you dive, you can dive a bit deeper. Many aquatic birds (ducks, gulls, gannets) and mammals (e.g., otters and sea otters) have webbed feet.

The limbs of turtles and seals changed into fins; dolphins and whales have strong fins located on the tail. Fish also move with the help of fins. Tiny shrimp and many water insects on their “legs” grow bundles of tough hair that serve as fins and membranes. Some animals, such as jellyfish and squid, use the principle of being active when moving. They collect water in the body cavity, and then forcefully throw it away, receiving a strong thrust that propels them forward.


Dive methods.

Many waterfowl and aquatic animals get food, diving after it into great depths. For animals with gills, this does not cause inconvenience, as they breathe oxygen dissolved in water.

Mammals take in oxygen from the air in the atmosphere, and they need to develop protective devices that prevent the harmful entry of gas into the bloodstream. Up to this point, they took a deep breath before diving. At this time, the saturated oxygen compresses the muscles that will be needed in the future, and the air content in the lungs decreases. Decreased air volume in the lungs leads to decreased pleasure in animals, and immersion is easier. All of them can hold their breath for a long time.