High-intensity exercise has significant effects on metabolic function, primarily through increased calorie expenditure and improved insulin sensitivity. Such workouts elevate the metabolic rate, leading to greater fat oxidation even post-exercise, commonly known as the afterburn effect. Additionally, they stimulate the production of beneficial hormones like growth hormone, enhancing muscle growth and fat loss. Regular high-intensity training can also improve cardiovascular fitness, leading to better overall metabolic health and reduced risks of chronic diseases.