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Health knowledge after swimming (what are the common knowledge of safety and health in swimming)
1. What are the common knowledge of swimming safety and hygiene?

Common sense of safety and hygiene in swimming Swimming is a popular sport.

With the continuous improvement of people's living standards, people's pursuit of healthy body and cultural entertainment is more intense, and more and more people take part in swimming activities. Swimming is an activity in the special environment of water. If you don't pay attention to safety and hygiene, you may have all kinds of injuries, damage your health and even drown.

Therefore, every swimmer and organizer of swimming teaching should attach great importance to safety and health issues, and must understand swimming safety and health knowledge, implement safety and health measures, abide by swimming safety and health rules, and prevent accidents and infectious diseases. First, establish the idea of safety first and implement safety measures. As the saying goes, "human life concerns the sky", "fire and water are ruthless" and "don't bully mountains and be afraid of water".

Swimming is a sport dealing with water. Remember safety first, don't be careless, be careful. Publicity and education on swimming safety must be repeated. Swimming teachers should emphasize in every class that safety education and safety measures should be prepared when preparing lessons. Students must abide by the safety regulations carefully.

Swimming pools (gymnasiums) must strengthen safety management, equip qualified lifeguards and life-saving equipment and facilities according to regulations, carefully formulate safety systems (regulations) and strictly implement them. Swimming activities, it is best to organize, or three or five people to go together, do not act alone, especially in natural waters can not swim alone.

When swimming, you should care about each other, go back together, and explain clearly when you leave halfway. In swimming classes or swimming activities, teachers must strictly organize and regularly check the number of people, and safety measures must be implemented (swimming class safety organization). Second, choose a safe and hygienic swimming place. The management of artificial swimming venues is relatively standardized, and the pool water is often disinfected, discharged and filtered with high clarity. Deep water and shallow water have clear signs and life-saving facilities, which should be the first choice for swimming.

If you go to natural waters or attend classes, you must make a good investigation in advance, and choose waters with good water quality, no pollution, appropriate water temperature, flat bottom, no silt, no obstacles and gentle flow. If you swim by the sea, you should know the law of tides, find out the time of high tide and low tide, and try not to stay away from the sea.

After choosing a place, make necessary arrangements, such as enclosing the place with ropes, marking the deep and shallow areas, and providing life-saving equipment such as lifebuoys and necessary medicines. Third, the physical examination before swimming. Physical examination before swimming is mainly to prevent accidents when patients swim, and also to avoid mutual infection of diseases.

Anyone suffering from heart disease, hypertension, epilepsy, active tuberculosis, infectious hepatitis, dermatosis, pinkeye, psychosis, otitis media, cold, fever and open trauma should not swim. Women should take sanitary measures when swimming during menstrual period, and it is not suitable to go into the water without taking measures.

Fourth, it is not advisable to swim after drinking, eating, hunger and fatigue. Drinking alcohol will make the central nervous system in a state of excessive excitement or inhibition, and swimming after drinking is prone to drowning accidents. Swimming after a full meal will reduce the blood supply of digestive organs, reduce the function of digestive organs and affect the digestion and absorption of food.

In addition, due to the temperature and pressure of water, the peristalsis function of gastrointestinal tract will be affected, which is easy to cause stomach spasm, abdominal pain or vomiting. Therefore, don't swim immediately after meals. It usually takes half an hour to an hour to get into the water.

It is not good to swim on an empty stomach, because the blood sugar content of the human body drops on an empty stomach, and it is easy to feel dizzy or weak limbs when swimming, and even faint. After strenuous exercise or strenuous physical labor, the body feels tired, muscle contraction and reaction are weakened, and drowning accidents occur.

Therefore, after strenuous exercise and strong physical labor, you should take a rest and swim after your physical strength returns to normal. 5. Get ready for activities before swimming. Warm-up activities can improve the excitability of nervous system, enhance the functions of cardiovascular system and respiratory system, accelerate the functions of blood circulation and respiratory system, accelerate blood circulation and metabolism, increase the strength and elasticity of muscles, correspondingly increase the range of activities of various joints of the body and improve flexibility.

These changes are beneficial for the body to adapt to the needs of swimming better and faster, and also have a positive effect on preventing cramps and strains. When preparing for swimming, you can generally do broadcast exercises, running, swimming imitation movements and various exercises to lengthen muscles and ligaments.

In particular, it is necessary to move the joints of the neck, shoulders, waist, buttocks, knees and wrists. Have a rest after preparing for activities, and then take a bath.

This is not only a measure to keep the water quality of the swimming pool clean, but also to make swimmers adapt to cold water before launching, so as to avoid accidents when suddenly launching. 6. When swimming, do what you can. When swimming in the water, beginners should be active in shallow water.

Swimmers who can already swim should also do what they can and arrange their exercise reasonably. When they feel abnormal body reactions, such as dizziness, headache, stomachache, nausea or vomiting, they should immediately go ashore, dry their bodies and rest until they recover before entering the water. If you overestimate your physical strength and skills, you will travel far away and cannot return, which will easily lead to drowning accidents.

Avoid all dangerous actions when swimming, such as diving in shallow water, fighting with each other, holding your breath for a long time, running and chasing by the slippery pool, etc. Seven, when you are calm and self-help and breathing and swimming, if you have cramps and other accidents, you should stay calm, don't panic, you should immediately go ashore or relieve cramps in the water, and you can also call for help, so that people around you can come to help in time.

If you find someone cramping or drowning, you should quickly go to the ambulance and call for help at the same time, so that people around you can come and rescue with you. Eight, pay attention to personal and public * * * hygiene, civilized swimming should be civilized, clean and opaque swimming trunks should be worn, how to deal with swimming pool rules and maintain public * * * hygiene consciously, take a bath before launching, and rinse it from head to toe.

No spitting, blowing your nose, defecating or throwing away sundries are allowed in the swimming pool, so as not to pollute the water quality and damage the health of yourself and others. After swimming out of the water, wash your body in time, then dry it and put on clothes to prevent colds.

Nine, prevent eye and ear diseases Because there are impurities and bacteria in the water, swimmers are prone to eye and ear diseases. To prevent eye diseases, we should not only choose clean swimming places for swimming, but also pay attention to maintaining public hygiene and cleaning the swimming pool regularly.

2. Common sense of swimming hygiene

First, be prepared for exercise. Exercise properly before swimming to ensure good health. Suffering from heart disease, hypertension, otitis media, etc. is not suitable for swimming. It is not suitable for swimming after strenuous activity. 1. Please don't run or chase by the pool to avoid slipping and injury.

2. Don't push people into the water at will by the pool, so as not to bump into others or hit the pool and get injured.

3. It is forbidden to dive by the pool, often because the water is shallow, which leads to cervical spine injury and lifelong paralysis.

4. When playing in the water, don't push others into the water to avoid choking.

When you are active in the water, when you feel cold, or when you are going to cramp, you should go ashore and have a rest.

6. If someone is found drowning, call for help immediately or call 1 10 for support. If you haven't learned to save people on water, don't jump into the water to save people.

7. If you find that you are not strong enough to swim back to the pool, you should immediately raise your hand for help, or shout "Help" and wait for help. Second, drowning self-help and mutual rescue 1, students should not take a bath in the pond without permission to avoid drowning accidents. Don't panic if you can't swim when you are drowning. Lift your back, head and mouth up, take a deep breath as much as possible and exhale shallowly, which can increase buoyancy and keep your body floating. If there are floating objects or climbers, catch them in time and wait for rescue. Swimmers, due to physical strength or other reasons, should call for help in time, calmly choose floating objects or climbing objects to approach quickly. If the calf gastrocnemius muscle spasms, you can use supine position to float on the water and straighten your big toe hard until it is relieved. If they find a whirlpool, they should try to avoid it. 3. After a person is rescued from the water, he should lie on his stomach, face down, open his mouth, let the accumulated water in the respiratory tract flow out naturally, remove foreign bodies from his mouth, keep his breathing unobstructed, and then send him to the hospital for treatment as soon as possible. (1) Be sure to warm up before swimming.

(2) Consider your physical condition before swimming. If you are too full, hungry or tired, don't swim.

(3) Before swimming, water your limbs before launching. Don't get into the water at once. (4) If you have chest pain while swimming, you can press your chest hard and wait until it is better. (5) When going ashore with abdominal pain, it is best to drink hot drinks or hot soup to keep your body warm.

3. Common sense of swimming hygiene

First, be prepared for exercise. Exercise properly before swimming to ensure good health. Suffering from heart disease, hypertension, otitis media, etc. is not suitable for swimming. It is not suitable for swimming after strenuous activity.

1. Please don't run or chase by the pool to avoid slipping and injury. 2. Don't push people into the water at will by the pool, so as not to bump into others or hit the pool and get injured.

3. It is forbidden to dive by the pool, often because the water is shallow, which leads to cervical spine injury and lifelong paralysis. 4. When playing in the water, don't push others into the water to avoid choking.

When you are active in the water, when you feel cold, or when you are going to cramp, you should go ashore and have a rest. 6. If someone is found drowning, call for help immediately or call 1 10 for support. If you haven't learned to save people on water, don't jump into the water to save people.

7. If you find that you are not strong enough to swim back to the pool, you should immediately raise your hand for help, or shout "Help" and wait for help. Second, drowning self-help and mutual rescue 1, students should not take a bath in the pond without permission to avoid drowning accidents.

Don't panic if you can't swim when you are drowning. Lift your back, head and mouth up, take a deep breath as much as possible and exhale shallowly, which can increase buoyancy and keep your body floating. If there are floating objects or climbers, catch them in time and wait for rescue. Swimmers, due to physical strength or other reasons, should call for help in time, calmly choose floating objects or climbing objects to approach quickly. If the calf gastrocnemius muscle spasms, you can use supine position to float on the water and straighten your big toe hard until it is relieved. If they find a whirlpool, they should try to avoid it.

3. After a person is rescued from the water, he should lie on his stomach, face down, open his mouth, let the accumulated water in the respiratory tract flow out naturally, remove foreign bodies from his mouth, keep his breathing unobstructed, and then send him to the hospital for treatment as soon as possible. (1) Be sure to warm up before swimming.

(2) Consider your physical condition before swimming. If you are too full, hungry or tired, don't swim. (3) Before swimming, water your limbs before launching. Don't get into the water at once.

(4) If you have chest pain while swimming, you can press your chest hard and wait until it is better. (5) When going ashore with abdominal pain, it is best to drink hot drinks or hot soup to keep your body warm.

4. What are the common sense of swimming safety and hygiene?

Common sense of safety and hygiene in swimming Swimming is a popular sport.

With the continuous improvement of people's living standards, people's pursuit of healthy body and cultural entertainment is more intense, and more and more people take part in swimming activities. Swimming is an activity in the special environment of water. If you don't pay attention to safety and hygiene, you may have all kinds of injuries, damage your health and even drown.

Therefore, every swimmer and organizer of swimming teaching should attach great importance to safety and health issues, and must understand swimming safety and health knowledge, implement safety and health measures, abide by swimming safety and health rules, and prevent accidents and infectious diseases. First, establish the idea of safety first and implement safety measures. As the saying goes, "human life concerns the sky", "fire and water are ruthless" and "don't bully mountains and be afraid of water".

Swimming is a sport dealing with water. Remember safety first, don't be careless, be careful. Publicity and education on swimming safety must be repeated. Swimming teachers should emphasize in every class that safety education and safety measures should be prepared when preparing lessons. Students must abide by the safety regulations carefully.

Swimming pools (gymnasiums) must strengthen safety management, equip qualified lifeguards and life-saving equipment and facilities according to regulations, carefully formulate safety systems (regulations) and strictly implement them. Swimming activities, it is best to organize, or three or five people to go together, do not act alone, especially in natural waters can not swim alone.

When swimming, you should care about each other, go back together, and explain clearly when you leave halfway. In swimming classes or swimming activities, teachers must strictly organize and regularly check the number of people, and safety measures must be implemented (swimming class safety organization). Second, choose a safe and hygienic swimming place. The management of artificial swimming venues is relatively standardized, and the pool water is often disinfected, discharged and filtered with high clarity. Deep water and shallow water have clear signs and life-saving facilities, which should be the first choice for swimming.

If you go to natural waters or attend classes, you must make a good investigation in advance, and choose waters with good water quality, no pollution, appropriate water temperature, flat bottom, no silt, no obstacles and gentle flow. If you swim by the sea, you should know the law of tides, find out the time of high tide and low tide, and try not to stay away from the sea.

After choosing a place, make necessary arrangements, such as enclosing the place with ropes, marking the deep and shallow areas, and providing life-saving equipment such as lifebuoys and necessary medicines. Third, the physical examination before swimming. Physical examination before swimming is mainly to prevent accidents when patients swim, and also to avoid mutual infection of diseases.

Anyone suffering from heart disease, hypertension, epilepsy, active tuberculosis, infectious hepatitis, dermatosis, pinkeye, psychosis, otitis media, cold, fever and open trauma should not swim. Women should take sanitary measures when swimming during menstrual period, and it is not suitable to go into the water without taking measures.

Fourth, it is not advisable to swim after drinking, when you are full, hungry and tired. Drinking alcohol will make the central nervous system in a state of excessive excitement or inhibition, and swimming after drinking is prone to drowning accidents. Swimming after a full meal will reduce the blood supply of digestive organs, reduce the function of digestive organs and affect the digestion and absorption of food.

In addition, due to the temperature and pressure of water, the peristalsis function of gastrointestinal tract will be affected, which is easy to cause stomach spasm, abdominal pain or vomiting. Therefore, don't swim immediately after meals. It usually takes half an hour to an hour to get into the water.

It is not good to swim on an empty stomach, because the blood sugar content of the human body drops on an empty stomach, and it is easy to feel dizzy or weak limbs when swimming, and even faint. After strenuous exercise or strenuous physical labor, the body feels tired, muscle contraction and reaction are weakened, and drowning accidents occur.

Therefore, after strenuous exercise and strong physical labor, you should take a rest and swim after your physical strength returns to normal. 5. Get ready for activities before swimming. Warm-up activities can improve the excitability of nervous system, enhance the functions of cardiovascular system and respiratory system, accelerate the functions of blood circulation and respiratory system, accelerate blood circulation and metabolism, increase the strength and elasticity of muscles, correspondingly increase the range of activities of various joints of the body and improve flexibility.

These changes are beneficial for the body to adapt to the needs of swimming better and faster, and also have a positive effect on preventing cramps and strains. When preparing for swimming, you can generally do broadcast exercises, running, swimming imitation movements and various exercises to lengthen muscles and ligaments.

In particular, it is necessary to move the joints of the neck, shoulders, waist, buttocks, knees and wrists. Have a rest after preparing for activities, and then take a bath.

This is not only a measure to keep the water quality of the swimming pool clean, but also to make swimmers adapt to cold water before launching, so as to avoid accidents when suddenly launching. 6. When swimming, do what you can. When swimming in the water, beginners should be active in shallow water.

Swimmers who can already swim should also do what they can and arrange their exercise reasonably. When they feel abnormal body reactions, such as dizziness, headache, stomachache, nausea or vomiting, they should immediately go ashore, dry their bodies and rest until they recover before entering the water. If you overestimate your physical strength and skills, you will travel far away and cannot return, which will easily lead to drowning accidents.

Avoid all dangerous actions when swimming, such as diving in shallow water, fighting with each other, holding your breath for a long time, running and chasing by the slippery pool, etc. Seven, when you are calm and self-help and breathing and swimming, if you have cramps and other accidents, you should stay calm, don't panic, you should immediately go ashore or relieve cramps in the water, and you can also call for help, so that people around you can come to help in time.

If you find someone cramping or drowning, you should quickly go to the ambulance and call for help at the same time, so that people around you can come and rescue with you. Eight, pay attention to personal and public * * * hygiene, civilized swimming should be civilized, clean and opaque swimming trunks should be worn, how to deal with swimming pool rules and maintain public * * * hygiene consciously, take a bath before launching, and rinse it from head to toe.

No spitting, blowing your nose, defecating or throwing away sundries are allowed in the swimming pool, so as not to pollute the water quality and damage the health of yourself and others. After swimming out of the water, wash your body in time, then dry it and put on clothes to prevent colds.

Nine, prevent eye and ear diseases Because there are impurities and bacteria in the water, swimmers are prone to eye and ear diseases. To prevent eye diseases, we should not only choose clean swimming places for swimming, but also pay attention to maintaining public hygiene, and often carry out water purification treatment and water quality inspection in swimming pools.

5. What are the five details of hygiene after swimming in the swimming pool?

Swimming is an aerobic and whole-body exercise. Swimming in summer can not only relieve summer heat, but also reduce weight and whiten skin, which is the first choice for many women.

However, it is difficult to ensure the water quality of swimming venues, and bacteria such as coliforms are easy to multiply. When people swim, it is inevitable that impurities such as skin excrement, shed hair, runny nose, sweat and even urine will be brought into the water. Therefore, cleaning and maintenance after swimming is particularly important.

1, eye care It is best to wear goggles when swimming. Eyes are very fragile and vulnerable parts of human body, and pathogenic microorganisms in pool water can easily invade them, and disinfectants in pool water can also cause conjunctivitis.

If your eyes are sore or uncomfortable after swimming, you can use chloramphenicol eye drops appropriately to prevent eye infection. When water enters your eyes, don't rub it with your hands, but rinse it with pure water.

2. Preventing Rhinitis The water quality of the swimming pool contains a large number of allergens that induce rhinitis. If you are allergic, you can take corresponding anti-allergic drugs before and after swimming to take some preventive measures, and you can also wear protective equipment to prevent water from entering the nasal cavity.

Don't blow your nose hard when choking, otherwise the eustachian tube will expand and dirty things will enter the middle ear through the eustachian tube and cause otitis media. You need to blow your nose several times after swimming.

You can also wash your nose with salt water after swimming to reduce the * * * effect of disinfectant in the swimming pool on nasal mucosa. 3. Bacteria in oral care water enter the respiratory tract and digestive tract through the oral cavity, and then infection occurs.

Especially when the human body's resistance drops and the oral mucosa has a wound or inflammation, it is more prone to infection, gingival swelling and even oral ulcers. You can disinfect with mouthwash if possible.

4, private parts cleaning can use water and lotion to help improve the acid-base environment of private parts, it is best to use professional weak acid private parts lotion to inhibit bacteria, pure water, can not completely wash away the attached bacteria. In turn, it may cause serious consequences such as infection and inflammation of private parts.

5. Cleaning hair is also the focus of cleaning. All kinds of impurities and bacteria in the water are easy to attach, and chlorine preparations in the pool water will directly damage the hair, resulting in yellow and dry hair. Therefore, before swimming, soak the hair with clear water, and it is best to apply a layer of conditioner or hair mask to strengthen protection.

6. How to pay attention to safety and hygiene when swimming?

I started swimming in the middle class of kindergarten.

1. Wash the bathing suit and let it dry in the sun. Then you can't wash it with hot water, use cold water, or the rubber band will break easily.

2. Before swimming, prepare to exercise for 5 minutes (at least 5 minutes) to prevent cramps. You can also eat more bananas.

3. When entering the water, move first to balance the body temperature. And you can hold your breath properly.

Buy a floating board if you can't swim. The floating board is made of foamed plastic. It is recommended not to use swimming rings, you can't learn.

5. Wash thoroughly after swimming to avoid cross infection.

6. Dry your head after swimming, or you will catch a cold.

7. Don't eat in a hurry. Drink mineral water first and eat in half an hour.

8. Pay attention to sleep at night

7. Swimming safety tips

-swimming precautions

Swimming is a good way to temper people's will and exercise, but swimming also has taboos.

First, avoid swimming before and after meals: swimming on an empty stomach will affect appetite and digestive function, and dizziness will occur when swimming.

Accidents such as fatigue; Swimming with a full stomach will also affect the digestive function, and it will also cause stomach cramps and even vomiting and abdominal pain.

Pain phenomenon.

Second, avoid swimming after strenuous exercise: swimming immediately after strenuous exercise will increase the burden on the heart; A sharp rise in body temperature

Declining will weaken resistance and cause colds, pharyngitis and so on.

Third, avoid swimming during menstruation: swimming during menstruation, germs easily enter the uterus, fallopian tubes and other places, causing infection.

Lead to irregular menstruation, menorrhagia and prolonged menstruation.

Avoid swimming in unfamiliar waters: When swimming in natural waters, avoid rushing into the water. Surrounding waters

The underwater situation is complicated, so it is not suitable to swim in order to avoid accidents.

5. Avoid long-term exposure to swimming: Long-term exposure can cause sunburn or acute dermatitis, also known as sunburn.

Hurt. In order to prevent sunburn, it is best to use an umbrella to shade the sun after landing, or to rest or bathe in the shade.

Put a towel on your body to protect your skin, or put sunscreen on your body.

6. Avoid swimming without warm-up activities: the water temperature is usually lower than the body temperature, and warm-up work must be done before entering the water.

Move, otherwise it will easily lead to physical discomfort.

7. Avoid eating immediately after swimming: It is advisable to take a break before eating after swimming, otherwise it will suddenly increase the burden on the gastrointestinal tract.

It is easy to cause gastrointestinal diseases after a long time.

Eight, avoid swimming for too long: the skin generally has three reaction periods to cold. The first stage: after entering the water, it is cold.

* * *, skin vasoconstriction, pale complexion. The second stage: after staying in the water for a certain period of time, the blood flow on the body surface

Swelling, the skin changes from pale to reddish, and the skin changes from cold to warm. The third stage: if the stay time is too long, the body temperature will dissipate greatly.

When you have a fever, your skin will get goose bumps and chills. This is a taboo period for summer outing, so leave the water in time. swim

Generally, the duration should not exceed 1.5-2 hours.

Nine, avoid swimming with a history of epilepsy: whether it is a big attack or a small attack, there is a moment of loss of consciousness during the attack.

If it is suddenly induced in swimming, it will be "catastrophic".

Ten, hypertensive patients avoid swimming: especially intractable hypertension, drugs are difficult to control, swimming is induced.

The potential danger of wind should be absolutely avoided.

Eleven, avoid swimming heart disease: such as congenital heart disease, severe coronary heart disease, rheumatic heart valve disease, more serious.

Patients with arrhythmia should "stay away from swimming".

Twelve, otitis media avoid swimming: whether it is chronic or acute otitis media, because water enters the inflamed middle ear.

It is necessary to "add insult to injury", worsen the condition and even cause intracranial infection.

Avoid swimming with acute conjunctivitis: the virus of this disease, especially in swimming pools, spreads quickly and quickly.

The width of the fence is surprising. Even healthy people should avoid swimming in the swimming pool in the popular season.

Fourteen, avoid some skin diseases swimming: such as all kinds of ringworm, allergic skin diseases and so on. , not only induce nettles.

Rash, contact dermatitis, and easy to aggravate the condition.

Fifteen, avoid swimming after drinking: after drinking, a large amount of glucose stored in the swimming body is consumed, and hypoglycemia will occur. Besides,

Alcohol can inhibit the normal physiological function of the liver and hinder the transformation and storage of glucose in the body, thus causing accidents.

16. Avoid neglecting post-swim hygiene: after swimming, wipe off the scale on your body with a soft dry towel and drop chloramphenicol or boric acid.

Eye drops for removing nasal secretions. If there is water in your ears, you can use "jumping on the same side" to discharge the water. After that,

Do some relaxation gymnastics and body * * * or take a nap in the sun 15-20 minutes to avoid muscle stiffness and fatigue.

8. Swimming safety tips

Original publisher: the big head of picking mushrooms

Swimming safety tips to prevent drowning safety knowledge Swimming is a good exercise, but also a risky way of exercise. If you are not careful, you may have a drowning accident. Therefore, we must attach great importance to swimming safety. First, swimming safety points 1. Don't go swimming alone, don't go swimming in places that are unfamiliar with water conditions or dangerous and suitable for drowning accidents, and don't go swimming in rivers, lakes, reservoirs and other places without permission. Choose a good swimming place and have a clear understanding of the environment of the place. You can't swim here if there is a danger warning. Pay attention to your health. People who are prone to cramps in their limbs at ordinary times should not take part in swimming or swim in deep water. Don't be too hungry and full when swimming. Don't go into the water for an hour after a meal to avoid cramps. 4. Be prepared before going into the water, and exercise first. If the water temperature is too low, wash your body with shallow water first, and then swim in the water after getting used to the water temperature. Students with dentures should take them off to prevent them from falling into the esophagus or trachea when choking. 5. Be self-aware of your own water quality, don't try to be brave after entering the water, don't dive and snorkel rashly, and don't fight with each other to avoid drowning. Don't swim in rapids and whirlpools, let alone drink and swim. 6. If you suddenly feel unwell during swimming, such as dizziness, nausea, palpitation, shortness of breath, etc. , should immediately go ashore to rest or call for help. 7. Before diving, make sure that the water depth here is at least 3 meters, and there are no weeds, rocks or other obstacles underwater. It is safer to enter the water with your feet first. Second, how to prevent lower limb cramps when swimming 1. You must warm up before swimming. 2. Consider your physical condition before swimming, and don't swim if you are too full, too hungry or too tired. 3. Dip some water in your limbs before swimming, and then jump into the water. Don't jump into the water at once. 4. If you have chest pain while swimming, you can press your chest hard and wait until you get better before going ashore.