Coffee is healthy and exercise is best after drinking coffee for 40 minutes.

Excessive consumption of coffee can also affect appetite, insomnia and vomiting; increase urine output, harm the bladder, and then cause urethral infection; lead to dyskinesia, shaking hands or unclear speech.

Drinking coffee can improve the excitability of the central nervous system, clear the mind, increase the sense of pleasure during exercise, and improve people's agility during exercise, which is very beneficial to exercise. However, it should be noted that do not exercise immediately after drinking coffee, otherwise it will increase the burden on the stomach; moreover, caffeine will not be absorbed by the body until 40 minutes after drinking coffee. Therefore, it is best to exercise 40 minutes after drinking coffee.

But this is not to say that drinking as much coffee as possible before exercise is better. If you take too much caffeine, coffee becomes a stimulant. In large-scale international sports competitions, athletes who drink too much coffee may be disqualified because their caffeine content is too high to pass the illegal drug test.

Excessive consumption of coffee can also affect appetite, insomnia and vomiting; increase urine output, harm the bladder, and then cause urethral infection; lead to dyskinesia, shaking hands or unclear speech.

So what is an overdose? Like the small packaged coffee sold in the general market, it is not excessive to drink one or two cups a day.