What role do macronutrients play in exercise?

Macronutrients play a crucial role in exercise primarily by providing energy for the body and supporting growth and repair of tissues. The three main macronutrients—carbohydrates, proteins, and fats—each serve specific functions that are vital for physical activity and overall health.

Carbohydrates are often the body's preferred source of energy, especially during high-intensity exercise. They break down into glucose, which is utilized for immediate energy and stored as glycogen in muscles and the liver for later use. Fats serve as a key energy source during lower intensity, longer duration activities, providing a more sustainable energy supply. Proteins, while mainly known for their role in muscle repair and growth, can also contribute to energy when carbohydrate stores are low.

Together, these macronutrients not only fuel workouts but also support the recovery phase post-exercise by aiding in muscle synthesis, hormone production, and other essential bodily functions. This combination of energy provision and tissue repair highlights why macronutrients are fundamental in the context of exercise.