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What happens during deep sleep

Deep sleep is when the body carries out most of its physical repair. Here is [...]

Why Poor Sleep Slows Physical Recovery

Why Sleep Improves Brain Performance

How Sleep Clears Waste From the Brain

How Sleep Supports the Immune System

How Deep Sleep Helps the Body Recover

Why Overheating Causes Night Waking

How Humidity Affects Sleep Temperature

Why Airflow Matters in Sleep Systems

How Mattresses Trap or Release Heat