Sleep and Rest

How to Improve Sleep Depth: A Diagnostic Guide for Deeper, More Restorative Sleep

Deep Sleep Is Not a Luxury. It Is a Biological Necessity. Deep sleep, or slow-wave sleep (Stage N3), is the phase where your body physically repairs tissue, clears metabolic waste from the brain, and consolidates declarative memories. If you are waking up feeling unrefreshed despite logging eight hours, the likely culprit is not sleep duration …