Final answer:
For fat loss while maintaining muscle mass, the best approach among the options given is a calorie-restricted, high-protein diet paired with resistance training. This combination allows for fat loss, muscle preservation, and muscle building.
Step-by-step explanation:
The best protocol for fat loss while maintaining muscle mass among the options presented would be a 'Calorie restricted, high protein diet with resistance training'. Under a calorie-restricted diet, the body burns stored fat for energy, leading to fat loss. A high-protein diet is crucial in preserving muscle mass during a calorie deficit, as it provides the body with the necessary amino acids that preserve and build muscle tissue. To ensure the retention of muscle mass, resistance training should also be incorporated. The muscular microtears from resistance training, coupled with a high protein intake, signal the body to rebuild the muscles, helping maintain muscle mass during weight loss.
Learn more about Health and Fitness