If I were to drink an espresso at 5:30pm and then go for a 2h run, would the caffeine still affect my sleep at say 9:30pm? I understand that the half life of caffeine is around 4-6hours, so my question is, would this reduce after burning extra energy?
In: Biology
Not really. Drugs are not caloric so you don’t burn through them faster by consuming more energy. Drugs have a half life because they literally lose their chemical structure while inside of your body. There may be some fluctuations in this depending on a number of factors but in general no. Your body isn’t burning caffeine. The caffeine is simply decomposing.
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