Is your body immune to coffee already? Try this: sip your cup of joe and then take a short nap right after.
Scientists have found a way to maximize the efficacy of both sleep and caffeine by recommending so-called "coffee naps." Since it takes a while for the caffeine to reach your brain, falling asleep for 20 minutes right after your coffee intake won't be a problem.
Here's how it works: when you drink coffee, the caffeine is absorbed through the small intestine and passes into the bloodstream and into the brain. Once there, it fits into receptors normally filled by a molecule called adenosine. Adenosine is a byproduct of brain activity, and makes you feel tired when it gets plugged into the receptors. That's when the caffeine helps: it blocks the receptors, so adenosine can't get through.
But for this to happen, your brain must be free of adenosine first. Napping clears it out, leaving those receptors open for the caffeine.
It's worth a shot, don't you think? Let us know if it works for you by commenting below!