can somebody explain to me how this shit is even a thing with a 6 hour halflife? a big cup of coffee has up to 400mg of caffeine in it which means you will still have 100mg in your system when you go to sleep. it absolutely nukes your rem sleep and deep sleep phases. this shit is literally worse than cocaine which lets you sleep after moderate use because of 1 hour halflife.

>Withdrawal occurs at dosages as low as 100 mg/day. That’s just one typical cup of coffee. One study (Field et al., 2003) even found that abstaining from just 41 mg/day for 30 hours decreased blood flow to some parts of the brain by 19-32%. The most common withdrawal symptoms are headache, fatigue, decreased energy/activeness, decreased alertness, drowsiness, decreased contentedness, depressed mood, difficulty concentrating, irritability, and foggy/not clearheaded-ness. Withdrawal is much, much more common than most people think. Many people just assume legal drugs are perfectly safe and only associate withdrawal with illegal drugs, even though there is practically no relation between the toxicity and addictiveness of drugs and their legal status, but caffeine withdrawal is extremely common. In fact, many studies overestimated the positive effects of caffeine, because they didn’t exclude habitual caffeine consumers. This causes participants to be in withdrawal during the study and the so called positive effects of caffeine are then merely withdrawal reversal. If your training sessions are notably poorer without stimulants, you may very well be in withdrawal. Withdrawal also causes muscle stiffness and weakness (Juliano & Griffiths, 2004).