High-intensity exercise generally involves shorter duration sessions compared to moderate exercise. High-intensity workouts, such as HIIT (High-Intensity Interval Training), typically last from 20 to 30 minutes and include intense bursts of activity followed by rest. In contrast, moderate-intensity exercises like brisk walking or jogging are sustained for longer periods, often 30 minutes or more. While high-intensity workouts are efficient for improving cardiovascular fitness and can lead to greater calorie burn in a shorter time, moderate exercises are easier to sustain and can be more suitable for beginners or those recovering from injury.