1, when preparing for work, you need to do some warm-up exercises to avoid sudden discomfort after falling into the water.

2. You need to check your glasses before diving, and the swimming eyepiece needs to be fixed. Falling into the water at high altitude is harmful to the eyes.

3. When taking off, whether you want to use fancy movements or not, the last one is to enter the water with the least resistance, otherwise it is easy to get hurt.

After diving, you usually need a rest to continue diving.

5, diving intermittent rest time need to do warm measures.