Diving into the water without an oxygen tank is called ‘free-diving.’ It is a form of apnea diving in which divers must hold their breath for an extended period while diving deep into the water with just one breath of oxygen. The difficulty in holding the diver’s breath during this time is not due to a lack of oxygen but rather an increase in carbon dioxide concentration. In other words, if you keep your heart rate low and your metabolism slow, you produce less carbon dioxide, which allows you to dive for a longer duration. The only way to maintain a low heart rate is to remain as calm as possible. Maintaining calmness has numerous benefits in life. - Joseph’s “just my thoughts”
Famous for his book "The Gun, the Germs and Steel," the great scholar "Jared Diamond" speaks 13 foreign languages. Once he made the wrong decision to change his job. He wanted to leave the field of science behind and become a "simultaneous interpreter." In the United States, however, speaking 13 languages seemed competitive, but being able to speak many languages in other parts of the world could not be competitive. Before doing a preferred occupation or doing something better than others, you should calmly be able to figure out your field of action first. - Joseph’s "just my thoughts"