What Is Core Sleep?

Core sleep refers to the essential portion of sleep that is most critical for physical and mental restoration. It usually comprises the first several hours of sleep, during which the body cycles through deep non-REM (rapid eye movement) sleep and REM sleep stages. These stages are crucial for memory consolidation, tissue repair, immune function and overall health.

Why Is Core Sleep Important?

During core sleep, the body undertakes vital processes such as muscle recovery, hormone regulation and brain detoxification. This period helps solidify learning and memories while promoting emotional regulation. Without adequate core sleep, people may experience cognitive impairments, weakened immunity and mood disturbances.

How Much Core Sleep Do You Need?

Typically, adults need about 4 to 5 hours of core sleep, often occurring in the early part of the night. This is followed by lighter sleep stages before waking. While total sleep duration varies by individual, ensuring sufficient core sleep is key to feeling rested and functioning well.

Summary

Core sleep is the crucial part of the sleep cycle involving deep and REM sleep stages that support physical repair, brain health and memory. Prioritising core sleep helps maintain wellbeing and cognitive performance.