Swimming, things you don’t know! Are you knowledgeable today？
Swimming and fitness, find out!
But do you really know enough about swimming?
As a qualified swimmer, you should not only have some opinions on technical movements, but also know a thing or two about swimming.
If someone asks you: Why is the fourth lane of swimming competition called the champion lane? Are you a little embarrassed that you can’t answer?
OK, today we are going to popularize some knowledge other than swimming skills and movements to help you "practice both inside and outside".
As we all know, the standard pool is 50m, and the semi-standard pool is of course 25m.
The width is 21 meters, while the Olympic World Championships require a width of 25 meters and a water depth of more than 1.8 meters. There are 8 lanes, each with a width of 2.5 meters, and the side lanes are added with 0.5 meters.
Both the standard pool and the semi-standard pool will be used as swimming pools, and the standard pool will be used in the world competition, while the world short-course championship will be held in the semi-standard pool.
The results of short-course swimming competition are faster than those of standard pool competition, because there is a speed blessing of turning and pedaling every 50m.
A soft rope with a pennant will be hung at both ends of the standard swimming pool. Generally, there will be brand words or logo on the flag, and many people may think it is an advertising flag.
In fact, it is called the 5-meter flag, which is set at both ends of the pool 5 meters away from the edge of the pool. Its function is to help backstrokers refer to the distance to the edge.
When you see the 5-meter flag, you will know that you are coming to the edge, and you can prepare to turn around or sprint. It acts as a reference.
Most swimming pools have a long black line at the bottom, which is the lane marking line.
At the bottom of the 50-meter-long pool, the lane marking line is 46 meters, and both ends are 2 meters away from the pool wall; There is a symmetrical horizontal line at both ends, which is 1 meter long, 0.2~0.3 meters wide and perpendicular to it.
The whole standard line is I-shaped, which reminds athletes to adjust their distance and turn around and pedal the pool wall.
The swimsuits and swimming trunks of the top players in the international arena are very expensive. The fiber products made of shark skin swimsuits can effectively reduce drag, and the price started at 5 figures, and then they were banned.
Today’s big brand "technology model" competition swimsuits are also between 3K and 5K, while hundreds of ordinary competition models don’t have much technology content.
Is such an expensive swimsuit because of its good quality and durability? Not really!
On the contrary, the service life of this kind of swimsuit is very short, and it will be invalid after about 10 times. The invalidation here is not broken, but its drag reduction performance and effect are greatly reduced.
The reason why it is expensive is that it can help athletes physically reduce drag in water. Through special materials and design, the resistance can be reduced by 1%-3%. Don’t underestimate this value, which is a matter of life and death in a short-distance race with a decisive victory of 0.01 seconds.
Fans who often watch swimming competitions should find that professional athletes wear two swimming caps.
First of all, the goggles of professional players are worn inside the swimming cap, which can avoid the swimming goggles from drifting into the water when diving.
Wear an extra layer of swimming cap to completely cover the first layer of swimming cap to reduce the resistance between the head and the water.
It says that the standard pool is 50m and 25m, but it will grow a little when the pool is actually built. Because electronic timing is used in professional competitions, it is necessary to install electronic timing boards on the walls of both ends of the pool, and the timing boards are thick, so it is necessary to leave room for installation. After installation, it will be 50m or 25m.
When the goggles are used for a period of time, the anti-fog layer will fail, and many people are troubled by the fog of the goggles in the water.
It’s a waste to get a new one so quickly. Many fans will buy antifogging agents, while professional athletes rely on licking.
There is something called atrial natriuretic peptide. When you swim, your body is squeezed by water, the veins of skin epidermis contract, blood flows back to your heart, the amount of effort increases, and the atrial wall is involved, so atrial muscle cells will release natriuretic peptide.
Atrial natriuretic peptide reaches the kidney through blood circulation, which will increase the generation of urogen, reduce the reabsorption of water by the collecting tube, and finally increase urine.
Therefore, when we are swimming, we often have urgent urination. Please go to the toilet!
Animals excrete in public places!
Most people in China learn to swim from breaststroke, and the initial breaststroke is really easy to learn and get started quickly.
However, the technical requirements of breaststroke in real competitive competition are very high, and there are many doorways in every movement of the wave frog. All professional athletes will tell you that breaststroke is the most difficult to swim.
Comparing the enlightened flat frog with the wave frog, it can be said that they are two completely different systems.
When professional players train, if they swim in line, no one wants to swim first, because it will be easier to swim with the front.
There will be a vortex behind the swimmer in front, and the swimmer in the back can catch the Shun Feng wave and follow the target reference at the same time, so it is more labor-saving to swim.
It’s like a leader in track and field and a broken bike, but my friends behind me, don’t touch my feet, okay?
There is really no need for a coach to get into the water except the initial stage when beginners learn to swim.
When you can’t swim, the coach needs to get into the water to ensure your safety, and at the same time give you a sense of psychological security and take you to experience the interaction with water.
When you start to control in the water, the coach will do the opposite.
Because you can’t observe all the movements of your body in the water, it is not conducive to helping correct mistakes.
At the same time, the coach’s demonstration underwater is not as accurate and clear as that on the shore, and the demonstration on the shore can also let you see clearly what part of yourself is wrong.
So, don’t complain about your coach’s lack of professionalism or professionalism because he doesn’t go into the water. You invited a coach, not an escort.
A few days ago, a fan said very ostentatiously: We change water in the swimming pool every week!
I just laughed and didn’t talk.
Change the water every week, and the boss is afraid to pay for it!
Nowadays, swimming pools have a circulation system, which filters the water outlet, discharges it at the water inlet, and circulates all the time to purify the water quality.
At the same time, regular drug precipitation, bottom absorption, and removal of impurities in water.
When it comes to changing water, it’s good to change it every six months, but it won’t all be changed, half of it will be taken away and half will be changed.
All water changes basically occur in the overhaul of swimming pools or seasonal closure.
Professional swimmers are basically five or five bodies, with long upper body and short lower body.
The basic requirement is that the arm span exceeds the height. The arm is like a boat’s sculls. The longer the arm, the longer the stroke distance, and the better the effectiveness.
Short legs (of course, not really short) can reduce the gravity of lower limbs and make the body better in the water.
Web swimming is a kind of swimming style in which you can kick the butterfly leg underwater without breathing.
A formal Asian Games event, but flipper swimmers didn’t practice flipper swimming from the beginning, and basically swimmers switched to other events to practice.
There are many options for swimmers to change events, such as triathlon, modern pentathlon, fin swimming, water polo and kayaking.
Many fans always complain that the temperature of the heated swimming pool is too low in winter, and they wish it could be more than 30 degrees.
The most suitable temperature of the fitness constant temperature pool is between 24 and 28 degrees. If the water temperature is too high, the body will collapse and the heart burden will increase during exercise, which is not conducive to health.
The water temperature in the swimming pool where professional athletes train will be lower because the exercise intensity is greater.
If you feel cold, don’t stand and chat, and this is not the place to take a bath.
The strength training of swimmers is very important, but it is seldom done.
The types of muscles developed by iron are not the same as those developed by swimming. Simply put, iron for body-building and bodybuilding produces massive hard muscles with great strength, while swimming needs strip soft muscles with better elasticity.
This point can be clearly found when we observe swimmers. They don’t have the big muscles of weightlifters, but they are all strip muscles with better lines.
Swimmers’ strength training is more of a resistance type, such as pulling confrontation exercises such as tensioners.
It is true that practicing swimming in adolescence can increase your height.
During the development of bones, the technical movements of swimming have been lengthening your body, such as the forward extension of freestyle and the forward slide of breaststroke.
Bones promote growth in repeated stretching movements. Similarly, basketball is the same, jumping and stretching.
But the weight loss effect of swimming is very general, and our article also talked about it separately before:
Although you don’t lose weight, the shaping effect is leverage!
For swimming, physical fitness accounts for 20%, and technology accounts for 80%.
Therefore, to learn swimming, we should first practice the technical movements, and then swim faster and faster by improving our physical fitness.
If you only pay attention to the growth of physical fitness and ignore the most fundamental technical movements, then your stage will be very small, your physical fitness will be limited and your skills will be infinite.
Physical fitness can be improved through silly practice, but technical movements can’t be done by swimming all the time.
The common waterline in swimming pools is not only used to separate swimming lanes, but also a designed wave breaker.
The function is to prevent water waves from forming bubbles and turn the swimming pool into a bubble pool.
Swimmers shave their hair, not just under their armpits, but all over.
This is to reduce the resistance in the water, which is said to be 2%. Professional athletes have done their best to reduce the resistance!
Why is the fourth lane the champion lane?
The final lane arrangement of swimming competition is set according to the preliminary or semi-final ranking.
Preliminary ranking: 1 2 3 4 5 6 7 8 corresponding
Lane arrangement: 4 5 3 6 2 7 1 8 lanes
The first place in the preliminaries will compete in lane 4, and the chances of winning the championship are higher, so it is called the championship lane.
1 and 8 are side roads, which will be affected by water waves bouncing back to the pool wall.
The individual medley, whether it is 200m or 400m, is ranked by butterfly and frog.
However, the four events of medley relay are ranked as the butterfly from the frog.
Because you need to consider starting in the water of backstroke.
In competitive swimming competition, triathlon recognized by professional athletes is: 200m butterfly, 400m medley and 1500m freestyle.
The physical energy consumption of these three competitions is very large, which is a limit test for athletes’ physical energy.
The training of these three major athletes is very hard. Here, we applaud veteran Sun Yang!
I tried my best to sum up the above knowledge about swimming for everyone. Maybe you know it, but there are definitely things you don’t know. Knowing more is also convenient for you to pretend … Sorry, it can also make you a more qualified and comprehensive swimmer!
Are you knowledgeable today?
