Sleep deprivation negatively impacts exercise intensity by reducing energy levels, impairing muscle recovery, and diminishing cognitive function. Lack of sleep affects the body's ability to recover from workouts and can lead to decreased performance due to fatigue. Moreover, it increases the risk of injuries and impacts coordination and focus, making workouts less effective. Studies show that insufficient sleep reduces endurance, strength, and agility. For optimal exercise intensity and performance, individuals should prioritize proper sleep hygiene and aim for at least 7 to 9 hours of restorative sleep each night.