TED Talk

Category: Education

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WHAT IS KETOGENIC DIET? High fat Sufficient protein Low carbohydrate diet Forces the body to burn fats rather than carbohydrates


WHY SHOULD WE STUDY THIS? D etermine effects of K etogenic diet on aerobic performance A thletes are constantly looking for new strategies to enhance performance A thletes to load up on carbohydrates which improves their performance and increases carbohydrate utilization during exercise Goal: decrease the rate of carbohydrate utilization but still increasing fat metabolism during endurance training .

What Are We Studying?:

What Are We Studying? S tudies have indicated that this diet doesn’t compromise aerobic endurance and strength performance while lowering body weight and fat mass. A thletes can metabolize fat more efficiently so ketogenic diet should be preferred over carbohydrate loading A llow subjects to maintain aerobic power and capacity E valuated by maximal oxygen obtained and lactate threshold

Scientific Concepts :

Scientific Concepts Endurance trained athletes delivers more blood and oxygen to working muscles due to higher cardiac output A thletes also produce less lactate at same load due to higher lactate threshold B oth of these adaptive changes facilitate fat oxidation K etogenic diet is deficient in carbohydrates so it provides an alternative fuel source for brain and muscles

How Was The Research Done?:

How Was The Research Done? 8 male subjects, average age 28 years old Requirements: O ff road cyclists with training experience of AT LEAST 5 years maximal oxygen uptake of 55 ml/kg/min 2 phases prior to annual training cycle Phase duration: 3 days Followed up with 4 weeks of ketogenic and mixed diet Randomly assigned to diet groups Training protocol: H igh volume and moderate intensity with one week recovery between the two month dietary and training interventions

How Was The Research Done?:

How Was The Research Done? S econd phase of evaluations: T ested for maximal oxygen uptake L evel of lactate threshold P rogressive test: Tested heart rate Oxygen uptake E xpired carbon dioxide The lactate threshold was determined by D-max method C omposition of diet were evaluated in both phases

Important Findings of Research :

Important Findings of Research At moderate intensity while on a ketogenic diet: L actate concentration was low H igher heart rate and VO2 max Lower respiratory exchange rate at maximal work loads after the ketogenic diet After last 15 min of exercise protocol there was lower plasma lactate concentration Improvements in VO2 max and lactate t hreshold D uring work at maximum intensity and was dependent on ketogenic diet This could be explained by lower muscle glycogen stores and reduced activity of glycolytic enzymes due to the 4 week diet

Is Ketogenic Diet Effective?:

Is Ketogenic Diet Effective? The diet proved most effective during the athletes off season The study proves that ketogenic diets can improve endurance in training but decrease the ability to perform at a high intensity

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