, June 18 -- Scientists have identified a brain mechanism that links deep sleep with growth hormone release, helping explain how quality sleep supports muscle growth, fat metabolism and brain function.

Researchers at the University of California, Berkeley, say the discovery sheds new light on why poor sleep can affect physical health and may eventually help develop treatments for sleep-related metabolic and neurological disorders.

Deep sleep, particularly the non-REM stage, plays a crucial role in repairing the body, strengthening muscles, supporting bone growth and regulating fat storage. It is also important for normal growth during adolescence.

Growth hormone, which is released mainly during sleep, is central to these processes. How...