According to the World Health Organization, about 1.28 billion adults worldwide have high blood pressure, most of which is not well controlled. One of the simple, effective and low-cost measures to support blood pressure control is to maintain the habit of drinking water right after waking up in the morning.
When you sleep, your body goes through many hours without water, leading to mild dehydration. This condition thickens the blood, increasing the resistance of blood flow in the vessels - a factor that contributes to high blood pressure.
Research shows that dehydration can reduce circulatory volume and activate the sympathetic nervous system, thereby increasing blood pressure. Drinking water in the morning helps dilute blood, improve circulation and calm the activity of the circulatory nervous system - a factor that is often over-stimulated in people with high blood pressure.
In addition, drinking 250-500 ml of water after waking up can help dilate blood vessels slightly, helping to reduce cardiopulmonary blood pressure in the early hours of the morning - the time when it is recorded to have a high rate of heart attack and stroke due to sudden increase in blood pressure.
Drinking water when waking up not only helps rehydrate the body but also plays an important role in stabilizing blood pressure. This is a healthy habit encouraged by global health organizations, especially for those living with hypertension.
