1. Drinking coffee often can make your body adapt. After the central nervous system is excited for a long time, drink coffee, tea, etc. It is easy to have no effect, and in fact, instant coffee is not refreshing, but helpful to sleep, but its bitter taste will stimulate nerves and produce temporary excitement. And the sugar content of instant coffee is too high. It is recommended to drink ground coffee and cook it yourself. Another reason may be that you are too tired and have time to rest. Drinking these things may not be effective even when you are particularly sleepy. _ And drinking more coffee when you are tired will cause trouble to your health. Caffeine in coffee is difficult to dissolve in cold water, but easy to dissolve in hot water. Coffee contains caffeine, which will excite sympathetic nerves after entering the body, thus eliminating drowsiness, improving blood circulation and making the body feel warmer without fatigue, so it has a "refreshing" effect. A drink after getting up in the morning is for refreshing, and a drink at work during the day can refresh you. Coffee can be a little stronger at this time. It is best to drink coffee after meals or in the evening. Coffee or tea has a refreshing effect, but it should not be used with meals and should be drunk after meals. Caffeine can stimulate cerebral cortex, eliminate drowsiness, increase feelings and thinking, and can be used as a cardiotonic agent to regulate heart function. It also has the functions of dilating renal blood vessels and diuresis. However, it is not only coffee that contains caffeine. Usually a cup of coffee contains 60-65 milligrams of caffeine. However, if you consume too much caffeine, you are prone to tinnitus and myocardial hyperfunction (the heart beats faster and the pulse frequency increases). And the pulse is uneven, so be sure to drink coffee in moderation. A few points don't quite fit your question. Just a reminder, drinking too much coffee is really bad! Healthy refreshing method: 1. You can often massage Hegu point. Hegu point is located at the front midpoint of the junction of thumb and metacarpal bone of forefinger, and it is an important point of the large intestine meridian of hand Yangming. Acupoint selection is to align the horizontal bar before the first pass of one hand's thumb with the edge of the tiger's mouth of the other hand, and then press it with the thumb. At this time, the place pointed by the fingertips is Hegu point. First make the left hand: hold the left hand with the right hand, and press the thumb of the right hand vertically 90 degrees on the left hand Hegu point. Press it tightly and loosen it: let go, once every 2 seconds, 30 times per minute. It is advisable to press vigorously, so that the feeling of numbness will soon appear under the acupoint, and even this feeling will spread to the fingertips of the index finger and above the arm. These feelings will show "qi" and the effect is particularly good. If you want to do it properly, besides pressing, you can also massage the acupoints at the same time. According to Hegu point, the stimulation is concentrated in the part along the large intestine meridian (from Xiang Ying point (i.e. nostril side) to the fingertips), so it is particularly beneficial to the head and face, oral teeth and upper limbs, especially for oral diseases, dental diseases, headache, fever, dry mouth, nosebleeds, arthritis, cervical spondylosis, scapulohumeral periarthritis, tennis elbow, etc. 2. Tea has always been considered as the first choice for refreshing. Maybe you are limited to simple green tea, black tea or ordinary tea. In fact, many fashionable and delicious herbal teas are also our good companions to refresh our minds. Drinking mint tea is the most admirable way to refresh oneself, and it has recently been recommended as a healthy drink by American fitness magazines. It tastes spicy and cool, and mainly contains volatile oil. The main components of the oil are menthol, menthol, menthone, menthyl ester, terpene, limonene and so on. It has the effects of expelling wind and cold, removing filth and detoxifying.

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