Different types of exercise result in varying energy expenditures. Aerobic exercises, such as running and cycling, typically burn more calories due to their sustained intensity and larger muscle engagement. Conversely, strength training primarily builds muscle and generates less immediate calorie burn during the workout but can increase resting metabolic rate over time. Activities like HIIT (High-Intensity Interval Training) offer a combination of both, providing significant calorie burn in a shorter duration. Understanding energy expenditure differences helps individuals tailor their workouts to align with their specific fitness goals, whether for weight loss, muscle gain, or overall health.