Decrease in athletic performance from low-carb high-fat diet

A 2018 case study in the Human Kinetics Journal revealed that a long-term low-carbohydrate, high-fat diet impaired the performance and well-being of a world-class vegetarian triathlete

The ketogenic diet: here’s the skinny for runners

Popular diet may be effective for weight loss, but runners should be wary of the possible side effects of substituting fats for carbs