Sleep plays a critical role in muscle recovery. During sleep, the body enters restorative stages where it produces hormones like growth hormone that aid in muscle repair and recovery. Adequate sleep also regulates levels of cortisol, a stress hormone that can hinder recovery if elevated. Insufficient sleep can lead to decreased muscle protein synthesis and increased fatigue, directly impacting performance in subsequent workouts. Quality sleep can enhance reaction time and overall physical performance, highlighting its importance for anyone engaged in regular physical activity or strength training.