Both groups performed the same training intervention (endurance, strength and high intensity interval training (HIIT)). Twenty male endurance-trained athletes (age 33☑1y, body mass 80☑1kg BMI 24.7☓.1kg/m 2) who habitually consumed a carbohydrate-based diet, self-selected into a high-carbohydrate (HC) group (n=11, %carbohydrate:protein:fat=65:14:20), or a LCKD group (n=9, 6:17:77). Low-carbohydrate diets have recently grown in popularity among endurance athletes, yet little is known about the long-term (>4wk) performance implications of consuming a low-carbohydrate high fat ketogenic diet (LCKD) in well-trained athletes.
