of cortisol like a dimmer switch. In balance, it glows softly to guide you into the morning. But when stress builds up, the switch gets slammed to maximum power in the middle of the night.
Why Your Sleep Cycles Matter More Than You Think
Each night, your brain moves through 90–120 minute sleep cycles. Early in the night, you get more deep sleep, which helps your body repair itself. Later in the night, you get longer stretches of REM sleep — the dream stage when your brain processes emotions and stores
