Drinking coffee can enhance the excitability of the central nervous system, clear the mind, increase the pleasure of exercise, and improve a person's agility during physical activity, which is very beneficial for sports. However, it should be noted that you should not exercise immediately after drinking coffee, as it will increase the burden on the stomach and intestines; moreover, it takes 40 minutes after drinking coffee for the caffeine to be absorbed by the body. Therefore, experts suggest that the best time to exercise is 40 minutes after drinking coffee.
But this does not mean that the more coffee you drink before exercise, the better. Excessive consumption, leading to too much caffeine intake, turns coffee into a stimulant. In major international sports competitions, if an athlete drinks too much coffee, they may fail the doping test due to excessively high caffeine levels in their body and lose their eligibility to compete.
Excessive coffee consumption can also affect appetite, cause insomnia, and induce vomiting; increase urine output, harm the bladder, and subsequently lead to urinary tract infections; and lead to loss of coordination, such as shaky hands or slurred speech.
So, what is considered excessive consumption? Hu Yang says that for small packages of coffee commonly sold on the market, drinking one or two cups a day is not excessive.