Hot and cold alternately stimulate the heart.
Dr. Liu Yang from the Sub-health Department of Oriental Hospital affiliated to Beijing University of Chinese Medicine told the reporter that hot springs can be divided into five types according to temperature: cold springs (water temperature below 25 degrees Celsius), micro-hot springs (water temperature around 26 to 33 degrees Celsius), hot springs (water temperature around 34 to 37 and 38 degrees Celsius), hot springs (water temperature around 38 to 42 degrees Celsius) and hot springs (water temperature above 43 degrees Celsius).
Many people feel very hot after soaking in hot springs, so they walk around in swimsuits, or move directly from hot springs to hot springs with lower water temperature. Liu Yang warned that these practices were unhealthy. When a person soaks in a hot spring, the sweat pores of the whole body are open. If he moves between hot springs with obvious temperature difference soon, or walks in the open air without paying attention to keeping warm after soaking in hot springs, he will easily catch a cold after being stimulated by cold, and his heart will also bear greater pressure under the stimulation of alternating hot and cold.
Experts also said that if there is skin trauma, or skin allergy or dermatitis, you can't soak in hot springs, otherwise it will accelerate the evaporation of skin moisture, destroy the skin protective layer and further aggravate the symptoms. People with fever and acute inflammation (such as colds and sore throats) are also not suitable for hot springs.
In addition, be careful not to soak in hot springs on an empty stomach, but don't eat too much before soaking in hot springs, otherwise symptoms such as dizziness, nausea and fatigue may occur. If you feel tired, too excited or angry after staying up late, don't soak in hot springs. Hot spring bathing is pleasant, but it should not be too frequent. Generally speaking, it takes 3 to 7 days between times.
Choose your posture according to your physique.
It's not just that simple to soak in hot springs. What's important is that different people choose different postures. Generally speaking, it is divided into recumbent, sitz bath and foot bath.
According to experts, horizontal immersion bath means that people who soak in hot springs lie on their backs in the water, their heads and necks are exposed to the water, and their bodies are submerged below the nipple line. This can reduce the pressure on the chest during immersion bath and reduce the cardiopulmonary load, which is suitable for people with weak physique.
Taking a dip bath means that people who soak in hot springs sit in the water, and only the lower waist, buttocks, thigh roots and genitals are immersed in hot water, which can improve the blood circulation of pelvic cavity and genitals, produce anti-inflammatory and analgesic effects, and have sedative and hypnotic effects. It is suitable for people with chronic pelvic inflammatory disease, prostatitis, constipation, hemorrhoids, proctoptosis, irregular menstruation of women, dysmenorrhea, rheumatic joint pain of lower limbs, etc.
Foot bath only needs to immerse feet and ankles in warm water, which has the function of "drawing blood downward" and can relieve the phenomenon of brain congestion in patients with hypertension, and is suitable for people with hypertension, insomnia, oligomenorrhea and foot rheumatism pain.
Hot springs for chronic diseases should be "limited"
Although soaking in hot springs has many benefits to the body, experts remind that soaking in hot springs should also have a "degree".
Chen Dongning, chief physician of the Department of Respiratory Medicine of Beijing Tongren Hospital, reminded people and the elderly who suffer from chronic diseases such as diabetes, hypertension and coronary heart disease to take it easy to soak in hot springs. It is best to choose only hot springs with a water temperature of about 34 to 37 degrees Celsius. The time spent in hot springs should not exceed 15 minutes, and the total time should not exceed 30 minutes. Otherwise, it may be harmful to the body because of the rapid heartbeat, high blood pressure and increased heart load when soaking in hot springs.
In addition, you should always observe your physical condition when soaking in hot springs. Once your heart beats faster (such as more than 0/40 beats per minute), or you feel dizzy or flustered, you'd better get out of the hot spring quickly. In fact, the best way to soak in hot springs is to sweat slightly. If you sweat a lot, or even sweat profusely, it means that the soaking is "over the top".
Tips for soaking in hot springs
1. Old people with dry skin should not soak in hot springs for too long.
2. Before entering the water, adapt to the water temperature, gradually transition from low water temperature to high water temperature, and gradually expand the time for blood vessels.
3. Drink water to replenish water after soaking in hot springs.
4. Don't soak too deeply for a long time, and let your body surface or rest in water in time.
5. When soaking in hot springs, you can wipe your face with a cold towel in time.
6. Some people think that leaving the ingredients in hot springs on the skin is good for your health, but it is not. In hot springs with high concentration of sulfur or alkali, if they are not washed or dried, the concentration left on the skin after water evaporation may increase by dozens of times, which is very irritating to the skin, so it is necessary to wash the water again after soaking in the hot springs.