😴 You spend about a third of your life sleeping, but sleep is far more complex than simply spending hours in bed. Understanding the different stages of sleep can help explain why some mornings you wake up feeling refreshed — and others, like you barely slept at all. 👉 Keep swiping to learn what happens during each stage of sleep, and comment SLEEP for tips on improving your sleep quality. #sleepcycle #sleepstages #sleephealth #healthyhabits #bettersleep Before you read it, we reviewed it. Article Medically Reviewed By: Thomas Johnson, PA-C Article Review Date: 1/22/2026 Source: Lockett, E. (January 22, 2026). Everything to Know About the Stages of Sleep. Healthline. healthline.com/health/healthy-sleep/stages-of-sleep Stage N1 is the transition from wakefulness to sleep. If you’re woken up during this stage, you often won’t even realize you’d fallen asleep. N2 sleep makes up the largest percentage of your total sleep time. You can still be woken relatively easily. This is the s...