People who can't swim or exercise are often in poor health and hold their breath for a short time. There is something wrong with the lung, and poor lung function will affect the patient's respiratory function. Asphyxia is an index to check lung function and health. Holding your breath for a short time is not necessarily a lung disease, so you need to do lung CT examination to determine the specific reasons.
The correct initial practice method of holding your breath is: take a deep breath first, breathe in every breath until you can't breathe any more, and then breathe until you can't breathe any more. The whole process should be calm and uniform. It takes about 5 minutes until the brain is slightly dizzy or sleepy, and then this feeling disappears completely. At this time, you start to hold your breath and look at the time. You will find that even for the first time, it is easy to hold your breath for 1.30 to 2 minutes. If you feel uncomfortable, such as holding your breath, or feeling a little dizzy, stop immediately and don't force it. Just practice several times a day, but the interval is preferably 1 hour, which will soon increase to about 3 points. But if drowsiness and dizziness increase, don't practice any more to avoid brain hypoxia. And don't force yourself to extend the time or increase the amount of training.