High-intensity workouts induce various effects on the body, such as increased metabolic rate and improved cardiovascular fitness. They promote muscle hypertrophy due to the stress placed on muscles, stimulating growth. Additionally, high-intensity training can lead to enhanced insulin sensitivity, which is vital for glucose regulation. However, these workouts can also result in significant fatigue and risks of injury if not approached carefully. Overall, they contribute to physical adaptations that improve performance and efficiency in subsequent exercise.