How long does the caffeine effect last off one regular coffee?

How long does the caffeine effect last off one regular coffee?

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  1. Some of the effects of coffee are long term. I’ve been told that cyclists who regularly drink coffee outperform those who don’t, even on days when they don’t have coffee. I suspect this is especially true if you tell them the coffee is on the other end of the ride.

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  2. That depends a lot. I used to be a heavy drinker of coffee; over the years, the quantity I needed rose and rose, I prepared a cup every half hour. To get over the “after-lunch-coma”, I drank “coffee-power-shots”, that is, a tablespoon of coffee plus the same quantity of sugar, stir in a little cold water and pour down. That worked for some weeks, but suddenly, my head started spinning, and I could do not much more than trudge into my bed. On the next day, my blood pressure was still extremely high, even though I felt sort of normal by then. I stopped drinking any coffee (or tea) at all for two years. Fortunately, my job schedule allowed having a nap after lunch at the time, and I didn’t have to work long hours very often. I was surprised how well I could get along without coffee.
    After that, I slowly started again, and a single cup of espresso could keep me awake for a full afternoon. That was a year ago.
    The quantity I need now slowly rose, but I am trying to keep it down. Usually, a cup of Greek/Turkish coffee in the morning and another one after lunch is enough for me, lasting like three hours each – the rest of the time has to work without.

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  3. The maximum blood plasma levels of caffeine after consumption seem to vary widely by individual, ranging from 15 minutes to two hours while half-life (the time to then fall to half that concentration) is about five to six hours. (The actual range is three to seven hours, dependent on many individual factors such as age, activity, enzyme levels, smoking, etc.)
    You may find this article from the Institute for Scientific Information on Coffee to be helpful: Overview .

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