One of the major causes is too much intake of salt so that a lot of people try to reduce the intake of salt.
But it has turned out that people who have high blood pressure because they can’t discharge the salt from the body are increasing.
High blood pressure is the condition that the pressure against the wall of blood vessels is high.
At present, if the top number is more than 140 mmHg or the bottom number is more than 90 mmHg, it is considered high blood pressure. If the condition of high blood pressure continues for a long time, the blood vessel which was soft becomes hard and fragile, which is hardening of the artery. In near future, it can cause heart attack or stroke.
The high blood pressure preventative measures recommended conventionally are (1) reducing salt and (2) doing moderate exercises.
(1) Reducing salt
When you eat salty food, the amount of salt in the blood increases, water is absorbed and the amount of the blood increases. As a result of that, the pressure against the wall of the blood vessel goes up. On the contrary, if you don’t take salt, the blood flow becomes calm and the pressure against the wall of the blood vessel lowers down.
(2) Doing moderate exercises
When you do moderate exercises, your body tries to deliver more oxygen to the muscle and the blood vessel becomes wider. That makes the blood flow calmer, resulting in the pressure against the wall of the blood vessel lower down.
But there are people whose effort to carry out the above preventative measures comes to nothing.
People who can’t improve their blood pressure with reducing salt and exercises are difficult to discharge salt from their body. Even if the intake of salt is small, their blood pressure goes up because salt remains in their body.
If you can’t discharge 80 % of salt through urine excluding sweat, you are considered that you can’t discharge salt properly.
The difference between people who can discharge salt and people who can’t is how to sleep at night.
What kind of sleep leads to storing salt in the body?
If you can sleep well, you can discharge salt, but if you can’t sleep well, you can’t discharge salt.
If you can sleep well, you don’t have stress, but if you can’t sleep well, you have stress.
The key to cause high blood pressure is hidden in the saliva secreted while sleeping.
The saliva of people who can’t sleep well with high blood pressure contains cortisol a lot. People who secrete cortisol in the middle of night try to raise the blood pressure using salt so that they can’t discharge salt and salt is stored in their body.
How to improve sleeping quality to promote discharging salt in the middle of night
The method is one nostril breathing method.
Basically, when we breathe slowly, we can expand alveoli in the lung and activate the parasympathetic nerve. Breathing through one nostril makes breathing deeper and activates the parasympathetic nerve more.
One nostril breathing method:
(1) Hold one nostril with your finger and breathe in from another nostril for about 10 seconds (Fig. 1).
(2) Breathe out slowly from the same nostril.
(3) Repeat this breathing method alternatively (right, left, right…) for 10 minutes before sleeping.
3 persons whose salt discharge had been less than 80 % and quality of sleep had been not good continued the above breathing method before their sleep for 3 days, and their salt discharge ratios were improved by more than 20 % and they became able to sleep well through the night.