What are the principles of diving

In recent years, leisure diving has become more and more popular in China. It is a kind of underwater sport that completely relaxes body and mind in a state similar to weightlessness, and enjoys completely different scenery from land in the quiet seabed. Facts have proved that diving can not only increase vital capacity, strengthen the strength of major muscle groups, improve swimming skills, temper will, exercise physique, and even lose weight. Diving can not only help people learn a lot about the physics, physiology and ocean of water, but also help people master the skills of first aid and drowning rescue.

(1) Diving is a sport that emphasizes team spirit and self-discipline. Due to the difficulty of language communication, people should consciously and strictly abide by the diving rules in the process of diving. In case of danger, they must keep calm and stick to unity and mutual assistance.

(2) If two people dive together, they must go in and out together from entering the water to going ashore. They can't let their companions go ashore alone. People who swim in front of them should always look back at their companions and slow down with their physical skills. Those who swim in the rear should stay in the slanting rear of their companions.

(3) People with the following conditions can not dive: they have undergone middle ear surgery or corneal surgery; they have a history of lung injury, especially spontaneous pneumothorax; they have severe obstructive pulmonary disease; they have congenital diverticulum or pulmonary blister disease; they have a history of epilepsy or cramps; they often faint with unknown causes; they have heart and coronary artery disease; they have insulin-dependent diabetes mellitus Having a history of urination; chronic alcoholism or drug addiction.