What is actually keeping you awake
The dominant brainwave in waking alertness is Beta (14–30 Hz). Sleep onset requires the brain to drop into Alpha (8–14 Hz), then Theta (4–8 Hz), then Delta (0.5–4 Hz). Stress, screen time, late caffeine and ambient noise keep the brain anchored at Beta long after the body would like to be asleep. Cortisol rises again at 3am, the brain wakes, and the cycle repeats. This is a measurable physiological problem, not a willpower problem.

