There used to be a saying that drinking a cup of coffee before exercise can enhance endurance and help to lose weight. Experiments show that drinking coffee before exercise can really enhance endurance and lose weight. Research shows that athletes who consume a small amount of caffeine can spend 30% more training time and 36% more results than ordinary athletes. Jane, sports nutritionist and consultant of British Olympic sports delegation? Griffin once said: "A cup of coffee or coke can quickly promote the dissolution of fat into the blood after being absorbed by the human body, so that the human body can use fat as the main energy source before converting the limited carbohydrate reserves into energy." In addition, caffeine can affect the part of the brain and spinal cord that deals with pain. Drinking coffee before exercise can alleviate the pain caused by exercise. Drinking coffee can improve the excitability of the central nervous system, make the mind clear, increase the sense of pleasure during exercise and improve the agility of people during exercise, which is very beneficial to exercise.

Although drinking coffee before exercise is beneficial to exercise, it should be noted that you should not exercise immediately after drinking coffee, otherwise it will increase the burden on your stomach. Caffeine will only be completely absorbed by the human body after drinking coffee for 40 minutes, so exercising after drinking coffee for 40 minutes can better exert the effect of drinking coffee. You should also pay attention to the amount of coffee you drink before exercise, not the more the better. Drinking a small amount of coffee 40 ~ 60 minutes before exercise really helps exercise.

But recently, Swiss researchers found that drinking coffee before exercise may have a bad effect on the heart, because caffeine will reduce the blood flow of myocardium during exercise. The reason is that caffeine will hinder the specific receptors in the blood vessel wall, and exercise may hinder the normal information transmission of dilating blood vessels, thus reducing the congestion of heart blood and affecting the oxygenation of human body.

Generally speaking, coffee can stimulate the brain, and drinking coffee can improve physical fitness, and it is even regarded as one of the drinks that can help athletes seek better results. However, because coffee will have a bad effect on the heart, if it is only for fitness exercise, there is no need to drink coffee often before exercise.