Coffee basic knowledge drinking coffee before exercise is bad for the heart
Drinking coffee before exercise may have an adverse effect on the heart, Swiss researchers have found. This is because caffeine limits the blood flow to the heart muscle during exercise. The researchers studied 18 healthy young people and found that caffeine did not affect myocardial blood flow when not exercising, but exercise immediately after taking caffeine tablets reduced myocardial blood flow by 22% at normal pressure. The reason is that caffeine blocks specific receptors in the walls of blood vessels, which may hinder the transmission of dilated vascular signals, thereby reducing myocardial blood flow and affecting oxygenation in the body.
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Experts remind: you should not drink coffee after drinking.
In daily life, some people are used to drinking a cup of coffee after drinking, thinking that good wine and coffee can sober up. In fact, it is not suitable to drink coffee after drinking. Chongqing nutrition experts say that after drinking alcohol, alcohol is quickly absorbed by the digestive system, then enters the blood circulation system, and then affects the gastrointestinal tract, heart, liver and kidney, brain and endocrine system, among which the brain suffers the most directly and seriously.
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Coffee healthy drinking coffee may lead to calcium loss
According to a report by Hong Kong's Ming Pao, laboratory tests show that there are 150 to 200 milligrams of caffeine in an ordinary cup of instant coffee on the market, of which Starbucks has the highest caffeine concentration. Office workers are refreshed by three cups in the morning, afternoon and evening, which has exceeded twice the recommended maximum intake of 300 mg for adults. In addition to drinking too much coffee may cause nervousness, irritability, anxiety, handshakes and insomnia.
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