Healthy fats play an essential role in a fitness diet by providing concentrated energy, supporting nutrient absorption, and aiding in hormone production. They help maintain cell membrane integrity and can improve heart health by lowering bad cholesterol levels. Consuming adequate healthy fats can enhance satiety, making it easier to manage hunger and overall calorie intake. Additionally, they are vital for optimizing performance in physical activities since they serve as a fuel source during prolonged exercises. Including sources like avocados, nuts, and olive oil in a fitness diet supports overall health.