Restorative sleep is a crucial phase of the sleep cycle that allows the body and mind to recover and rejuvenate. During this stage, the body repairs tissues, builds bone and muscle, and strengthens the immune system. It is characterized by deep sleep, which is essential for physical health and overall well-being. In addition to physical recovery, restorative sleep plays a vital role in cognitive functions such as memory consolidation and emotional regulation. This type of sleep typically occurs during the NREM sleep stages, particularly slow-wave sleep, which is when the brain is least active and the body can focus on healing and restoration.