2. Take the goggles directly into the swimming pool and walk on the ladder.
3. Inhale with your mouth before entering the water, and keep it.
4, head into the water, hold your breath and slowly exhaust with your nose, and your ears hear snoring. Be careful not to open your mouth.
When the gas is almost exhausted, slowly lift your head out of the water. Keep your mouth shut.
6. Lift your head out of the water, then open your mouth and inhale, and practice repeatedly to form a habit.
Extended data:
Matters needing attention
1. You must swim under the guidance of your parents (guardians). Swimming alone is the most prone to problems. If your companion is not a parent (adult), it is difficult to guarantee that you can get proper help when you are in danger. (taboo for children)
People who are sick should not go swimming. Patients with chronic diseases such as otitis media, heart disease, dermatosis, liver and kidney diseases, hypertension, epilepsy and pinkeye, as well as those with colds, fever, mental fatigue and physical weakness, should not go swimming, because these patients are not only prone to aggravate their illness, but also prone to cramps, accidental coma and life-threatening.
3. After taking part in strong physical labor or strenuous exercise, you can't jump into the water to swim immediately, especially when you are sweating or fever. Otherwise, it is easy to cause cramps and colds.
Baidu encyclopedia-swimming