In the context of health and fitness, "metabolism" refers to the biochemical processes that convert food into energy within the body. This includes the breakdown of macronutrients like carbohydrates, proteins, and fats to generate energy necessary for various bodily functions and physical activity. Metabolism comprises two primary components: catabolism (the breakdown of substances) and anabolism (the building of substances). A higher metabolic rate can enhance calorie burning, aiding in weight management and overall fitness goals.