Getting your hands dirty boosts your health within weeks - BBC

A good night's sleep does much more than leave you feeling refreshed. During deep sleep, the body releases growth hormone, a powerful chemical messenger that helps build muscle, strengthen bones, and regulate fat metabolism. For teenagers, getting enough sleep is especially important because growth hormone plays a major role in reaching their full height potential. Scientists have long known that insufficient sleep can interfere with growth hormone production. What remained unclear was exactly how the brain controls this process, particularly during non-REM sleep, the deep, restorative stage that typically dominates the earlier part of the night.

A good night's sleep does much more than leave you feeling refreshed. During deep sleep, the body releases growth hormone, a powerful chemical messenger that helps build muscle, strengthen bones, and regulate fat metabolism. For teenagers, getting enough sleep is especially important because growth hormone plays a major role in reaching their full height potential. Scientists have long known that insufficient sleep can interfere with growth hormone production. What remained unclear was exactly how the brain controls this process, particularly during non-REM sleep, the deep, restorative stage that typically dominates the earlier part of the night.