Police, teachers and people who walk and stand for a long time are easy to cause vasodilation of lower limbs, and blood is easy to accumulate in lower limbs. If you put your feet high during sleep, you can make blood flow back to your heart, improve blood circulation, and help lower limbs recover from fatigue.
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It should be noted that the height of the cushion should be 5- 15 cm, and 10- 15 cm is the best. Too high will press the blood vessels at the root of the thigh, and the effect will be counterproductive. Especially for patients with hypertension, it is best to reduce the height appropriately, otherwise it will cause headache due to too fast blood return.
Sleeping with your feet up has many advantages, but it is not suitable for everyone. If you have cardiovascular disease, try not to sleep with your legs crossed, because most heart diseases are prone to attack at night. If you sleep in this position, it may lead to serious ischemia of the heart, and the height of lower limbs is higher than that of the heart, which will make the blood return less, increase the burden on the heart and increase the oxygen consumption of the myocardium. Therefore, patients with cardiovascular diseases should try not to sleep like this. It is safer to sleep with your head high and your feet low.
References:
/www.chinanews.com/hr/hr-xywy/news/2009/1-27/1988661.shtml "target =" _ blank "title =" China News. China News Network-Don't put your feet up when you sleep.