2. After finishing the warm-up exercise, you should pour some swimming pool water on your body first, so that your body can get used to it before entering the water, otherwise it will easily lead to cramps.
3. The swimming time should not be too long, and it is better to swim within two hours.
Wash your eyes with clean water every time you finish swimming. If there is water in the ear canal, it must be cleaned up and then bathed to reduce the chance of contracting infectious diseases, such as conjunctivitis, otitis media and dermatitis.
5, don't swim on an empty stomach and a full stomach, swimming on an empty stomach is easy to make people collapse, and swimming on a full stomach will produce bad symptoms of the digestive tract.