Sometimes speaking is normal and the voice is not loud. Why do you feel dizzy when you say too much?

Our brain needs enough water, nutrition and oxygen to function normally, so dizziness is indispensable to these three conditions.

If we want to make a sound normally, we have to produce gas through the lungs, make our vocal cords vibrate, and then make a sound. Even if the sound is not loud, it needs normal gas to blow, and then there will be problems with the oxygen supply to the brain, because the nutrients that our lungs can absorb are limited. When we breathe, the oxygen we can inhale is limited, and then when we speak, we absorb some gases. Or use some gas, our brain can receive less oxygen, which has no effect in a short time, but if we talk for more than half an hour for a long time, our brain will have insufficient blood supply, and then we will feel dizzy, which will not have a great impact on our body. Pay attention to rest, ensure adequate oxygen supply to the brain, and give him a certain rest time, and he will naturally recover.

You can improve your vital capacity by some means the day after tomorrow. Since we need lung qi to speak and oxygen to supply blood to the brain, we can find ways to expand our lung capacity, for example, through long-distance running, for example, through exercise, so that our lung capacity becomes larger, we can bear more oxygen and carbon dioxide discharge, and let the brain absorb more oxygen relatively, so that we can talk for a longer time without dizziness.

Eating more vegetables at ordinary times, then ensuring adequate nutrition intake, paying attention to lunch break at noon, keeping enough sleep at night and maintaining a stable emotional state are all conducive to keeping our brains awake. Emotion, body and sleep state will all affect our brain state.