There was no significant change in performance of the 100km TT between groups (HC -1.13min Fasting serum beta-hydroxybutyrate (βHB) significantly increased from 0.1 at baseline to 0.5mmol/L in the LCKD group (P=0.011, ES: 0.403) in week 12. The LCKD group experienced a significantly greater decrease in body mass (HC -0.8kg, LCKD -5.9kg P=0.006, effect size (ES): 0.338) and percentage body fat percentage (HC -0.7%, LCKD -5.2% P=0.008, ES: 0.346). During post-intervention testing the HC group consumed 30-60g/h carbohydrate, whereas the LCKD group consumed water, and electrolytes. Prior to and following successful completion of 12-weeks of diet and training, participants had their body composition assessed, and completed a 100km time trial (TT), six second (SS) sprint, and a critical power test (CPT). 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.
0 kommentar(er)
