What are the primary macronutrients and their roles in physical activity?

The primary macronutrients are carbohydrates, proteins, and fats, each playing crucial roles in physical activity. Carbohydrates serve as the body's main energy source, particularly during high-intensity exercise. They are broken down into glucose, which fuels muscles and brain function, making them essential for both performance and endurance.

Proteins play a key role in muscle repair and recovery, which is vital after physical exertion. When we engage in any form of physical activity, especially strength training, muscle fibers undergo stress and microscopic damage. Consuming proteins aids in muscle repair and growth by providing the necessary amino acids for tissue rebuilding.

Fats are important for energy storage and can be utilized during prolonged, moderate-intensity activities. They provide a concentrated energy source and are also vital for the absorption of certain vitamins. This balance of macronutrients helps support various aspects of physical activity, from energy supply and performance to recovery and growth.

The other options include components that are important for overall health but do not provide a complete representation of the primary macronutrients necessary for physical activity. For instance, vitamins, minerals, and fiber aid in various bodily functions but are classified as micronutrients, and electrolytes play a supporting role in hydration and muscle function rather than serving as primary