When summer comes, many people like to go swimming, swimming is not only good for fitness, but also can bring a touch of coolness to people. So for people who often swim, swimming is good before or after meals?
Is it good to swim before meals
Swimming before meals is not good. Before meals, people are in a fasting state, low blood sugar, swimming at this time is easy to swim in the process of dizziness, weakness symptoms. And swimming before meals will also affect appetite and digestive function.
Is it good to swim after meals?
Swimming after meals is not good. After eating too much swimming will also affect the body's digestive function, but also easy to produce stomach cramps, and even vomiting, abdominal pain and other phenomena. So before and after meals are not suitable for swimming.
When is a good time to swim
Swimming is better during the day between meals and when you have enough energy. Daytime temperature is higher, the human body temperature and body activity is also higher, can better adapt to the pool temperature. At night, the water temperature decreases, and under the stimulation of the temperature difference, the human leg muscles are prone to spasm, and it is easy to accidental conditions.
When should not swim
After strenuous exercise and alcohol are not suitable for swimming. After strenuous exercise, the body temperature rises, into the water will make the body temperature plummet, resulting in a weakened resistance, causing colds. After drinking, the body's microvascular expansion, swimming will lead to rapid blood reflux, increasing the burden on the heart, and alcohol inhibits liver function, preventing the conversion of glucose, people will be dizzy and confused because of low blood sugar.
How long is good to swim
The optimal length of each swim is 20-45 minutes. General swimming pool water contains chlorine, this substance will evaporate from the water and absorbed by the skin, swimming within 20 minutes, inhaled chlorine will not have a great impact on the human body, but with the extension of time, it may lead to disease.
