What would the effects of a month long high-protein, high-fat diet, low carbohydrate diet be on athletic performance during a marathon? Assume that the person will run the majority of the marathon at...

What would the effects of a month long high-protein, high-fat diet, low carbohydrate diet be on athletic performance during a marathon? Assume that the person will run the majority of the marathon at >80% VO2peak and will likely run the last few miles at 90% VO2peak: A. Improve because you have now trained the body to oxidize fatty acids for prolonged periods of time B. Improved performance because it provides plenty of protein / amino acids for prolonged exercise which can be used for gluconeogenesis C. The subject will be glycogen depleted and performance will be worse D. No effect