People love to swim in the summer, swimming, although the benefits of many, but there are also many matters needing attention. So let's take a look at the following swimming should pay attention to what matters?
Do not swim on an empty stomach
People are in a fasting state before meals, fasting when people's blood glucose value is low, and swimming needs to consume a lot of glucose, glucose supply is insufficient to make people in the swimming process, dizziness, weakness and other symptoms. And swimming before meals will also affect appetite and digestive capacity.
Do not swim after meals
Swimming is also not advisable when you have eaten too much after a meal. Swimming after meals will affect the body's digestive function, but also easy to produce stomach cramps, and even vomiting, abdominal pain and other phenomena.
Do not swim after strenuous exercise
After strenuous exercise, human heart rate and blood flow rate are relatively fast, this time swimming will increase the burden on the heart. And just play sports, the person's body temperature, directly into the water will make the body temperature plummet, resulting in a weakened resistance, causing symptoms such as colds.
Do not swim after drinking
The microvascular expansion of the human body surface after drinking, swimming will lead to rapid blood reflux, so that the heart burden suddenly increased; and alcohol inhibits the normal physiological function of the liver, preventing the conversion of glucose and reserves, when the supply of glucose is insufficient, people will appear dizzy and fuzzy because of hypoglycemia.
Swimming time should not be too long
People in the water is easy to dissipate heat, swimming too long will make the thermoregulatory function is damaged, so that the skin in the artery contraction, small vein expansion, so that blood stagnation in the subcutaneous veins, resulting in skin bruising, lips black, body "goose bumps. The skin is bruised, the lips are black, and the body has "goose bumps". The spasm even occurs. In addition, the water contains chlorine, swimming for too long will also lead to the body by the chlorine attack caused by disease.
Do preparatory activities before swimming
It is very dangerous not to do preparatory activities before swimming. Because the water temperature is usually lower than the body temperature, sudden entry into the water will lead to body spasms under the stimulation of the temperature difference, it is easy to drowning events. Therefore, before entering the water must do preparatory activities, and then wet the body with water, and then slowly into the water.
