A good sleep will refresh you. During sleep you can pass through 4 phases: 1, 2, 3, and REM (Rapid Eye Movement). These stages can pass regularly from stage 1 through to REM, and begin at stage 1 again. This complete cycle lasts roughly 90 to 110 minutes. Stage One In this stage, you drift
You are wrong if you think sleep is a passive. In fact, sleep is a very active state. Two Main Types of Sleep Types Features Non-Rapid Eye Movement (NREM) Sleep It occurs during the first 90 minutes. It restores the physical body. It releases growth hormones. It stimulates the immune system to defend against infections.