Reasons for swimming for example, if you move your hands and feet at the same time in breaststroke

I'm tired after swimming for a while. What's the matter
You are too poor for exercise. The swimming posture is wrong. For example, if you move your hands and feet at the same time in breaststroke, the forces generated by your hands and feet will offset. You can't swim far and are tired. Breaststroke should be a very leisurely swimming posture, with hands and feet motionless, hands straight and legs kicking. People here move forward like a submarine in the water
About swimming
When did this sport become popular in China because of its large (small) scale? Did it cost more or less? Why? How much is it about? Which province is best at this sport? Why? List the historical background of the most famous athletes in each sport (including their best results). Thank you. But I don't want to learn swimming, I doWhy can a newborn child swim
The reason why a newborn child can swim is that the fetus is surrounded by amniotic fluid in the mother, that is to say, the baby has always lived in the water before birth, so the baby has a very good sense of water. At the same time, this sense of water will weaken with age. This is also the reason why it is easier for children to learn swimming than adultsWhy fish swim
The reason why a fish can swim is related to its physiological structure. First, the swim bladder. The fish can float up and down by adjusting the air capacity in the swim bladder. Second, the tail. The fish tail is used to control the swimming direction. Third, the fin provides power. Fourth, the fish gill is used to breathe oxygen in the waterWhy do people like swimming
The benefits of swimming to human health swimming, like many sports, not only has a certain therapeutic effect on a variety of chronic diseases, but also has its unique therapeutic value. The main reasons are as follows: (1) swimming is in the sunWhy swimming in the sea is better than swimming in a public swimming pool
There is less pollution in the sea. The sea is rich in minerals, and there are sunny beaches. You will feel happy physically and mentally. The public swimming pool has a large flow of people and poor sanitation. Once the chlorine containing disinfectant in the pool water meets the organic matter brought by the human body, it will react to form chloramines, which will volatilize and disperse in the air (trichloroamine is the most volatile)The reason why people keep swimming for 20000 miles under the sea
The reason why people kept swimming for 20000 miles under the sea was that they were thrown into the sea, and another object they were chasing was an island. From the seventh chapter of twenty thousand miles under the sea, after being thrown into the sea, alonas and others struggled to swim and finally reached a floating " Island " The island was the object of their pursuitWhat equipment does a regular swimming pool need
 A swimming pool is a place for swimming. You can play or compete in it. Most swimming pools are built on the ground. According to the water temperature, they can be divided into general swimming pools and warm water swimming pools. Standard swimming pool equipment includes: swimming pool filtration and circulation equipment, swimming pool water disinfection equipment, swimming pool water dosing disinfection and sterilization system (coagulation and chlorination), swimming pool ozone disinfection equipment, swimming pool water quality monitoring system, swimming pool water heating constant temperature system (automatic control and safety protection), swimming pool underwater lighting system, swimming pool water distribution system, swimming pool body cleaning system Swimming pool escalator grille system, machine room and pool body pipeline system and other swimming supporting equipment (010-84637763 consult Bokai Engineering Department) are 50 meters long and 21 meters wide. The Olympic World Championships require a width of 25 meters. In addition, there is a swimming pool that is only half the length, that is, 25 meters, called a short pool. Water
... Sports but drowning tragedies happen from time to time. Do you know the reasons for this
Swimming is really a good sport, but there are several reasons for drowning. First, without better rest and diet, the body suddenly has hypoglycemia. Second, heart discomfort will lead to insufficient blood supply to the heart and brain. Third, the leg is cold and cramped, and the movement is blocked for a while. In short, do not swim if you are in poor health. It will be dangerousWhy do children have to learn to swim
Swimming is a basic survival skill. Recently, more than 100 children in a swimming class in Hangzhou experienced fever after swimming training. The health department confirmed that this event was an epidemic of pharyngeal conjunctival fever caused by adenovirus infection. The virus spread through close contact, respiratory tract and swimming pool water, resulting in cross infection among children. After the eventWhy does swimming drown
Main reasons: lack of safety awareness and poor swimming skills: This is the case of more drowning. As the saying goes, "those who drown will drown", it is this situation. Being able to swim does not mean not being able to drown. Many people have just learned to swim. They don't know much about the nature of water and can't tread on water