Ketosis, Fat Burning & Endurance Exercise


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Endurance exercise athletes physiology was believed to be fed primarily glucose. In other words, when an athlete depleted their stored sugar, glycogen they will become fatigued and hit a wall (bonked). This has led many athletes to consume carbs before, during and after. However, new research has demonstrated using fat as a primary fuel source and use ketosis as a way to do it. This must involve becoming ketoadapted. This is what has been missing – getting an athlete to adapt fully to ketosis. It was then found that elite endurance athletes burned more than 2x the fat then carb fed athletes.

Dr. Eric Berg DC Bio:
Dr. Berg, 51 years of age is a chiropractor who specializes in weight loss through nutritional and natural methods. His private practice is located in Alexandria, Virginia. His clients include senior officials in the U.S. government and the Justice Department, ambassadors, medical doctors, high-level executives of prominent corporations, scientists, engineers, professors, and other clients from all walks of life. He is the author of The 7 Principles of Fat Burning, published by KB Publishing in January 2011. Dr. Berg trains chiropractors, physicians and allied healthcare practitioners in his methods, and to date he has trained over 2,500 healthcare professionals. He has been an active member of the Endocrinology Society, and has worked as a past part-time adjunct professor at Howard University.












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This video is not designed to and does not provide medical advice, professional diagnosis, opinion, treatment or services to you or to any other individual. Through my videos, blog posts, website information, I give suggestions for you and your doctor to research and provide general information for educational purposes only. The information provided in this video or site, or through linkages to other sites, is not a substitute for medical or professional care, and you should not use the information in place of a visit, call consultation or the advice of your physician or other healthcare provider. The Health & Wellness and Dr. Eric Berg, D.C. are not liable or responsible for any advice, course of treatment, diagnosis or any other information, services or product you obtain through this video or site.


  1. My half Marathon coming after 2 weeks. I do inter-mitten fasting to. Did u ate before the marathon ? and before the day what food u can recommend to eat ?

  2. So when you reach your goal weight, do you want to stop ketosis, and maintain a carb level that keeps you out of ketosis but sustains your goal weight? That's what Atkins has you do, right?

  3. Most of these chiropractors are not adjusting spine, most of them are all in nutrition and telling you to be UNNATURAL and be like manipulated your metabolism to be like a diabetic who is insulin resistance. Create your own insulin resistance by not having your GOD GIVEN INSULIN and don't eat PLANT FOOD GLUCOSE, made from your CO2

  4. Dr. Berg, in this video you talk about ketosis being good for your endurance exercice. Is that so even other way around? Is endurance exercice like running good for fat burning?

  5. Nobody ever mentions bicycling. I ride trails 1-2 hrs every other day. I've been in ketosis 2 months and my BMI (too heavy) still hasn't budged.

  6. I run 25 miles a week in Ketosis. Aside from keto rash, I have been running very strong on a keto diet. No digestive distress, reduced inflammation and I'm considerably leaner.

  7. You have to be low carb for a long time for this to work- all that time to transition you can't train hard. You should have mentioned that.

  8. A 40,000 calorie reserve means that if you train properly you can run at unimaginable speeds because you can burn a limitless amount of calories. I believe that Katie Katie Ledecky in the Olympics was using ketosis and that's why she was almost lapping her carb loading world class athletes and why she wasn't tired at all after each race. Also in an interview I saw she said she didn't eat carbs or pizza. Also Kenyans, the fastest runners in the world are hearers, and hunter gathers which means they are in ketosis. This 40,000 calorie reserve with proper training allows the Kenyans to run at a constant 4 to 5 minute mile pace for 26.2 miles. And finish a marathon in 2-4 hours. Once all athletes realize this truth were going to see speeds in sports we never thought possible before.

  9. I asked a question about exercise on the show this morning and whilst I enjoyed this video which you referred to I was actually more interested not in the effect of big time athletes but rather exercise and ketosis in general. I get the impression from other things you have said that really exercise is in the 15 percentile range in terms of effect on weight and 85% is in what and how we eat. I still would appreciate some general comment on what a 64 year old should be doing in terms of exercise while in ketosis. Thank you!

  10. I lose about a pound of fat daily on ketogenic diet by
    drinking energy drink that contains ketons. Instead of reaching ketoses state in
    5-7 days I get there in 20- 40 minutes

  11. I'm 21 years old 6'0 165lbs. I keto adapted In 1 week (maybe because I've keto adapated when i was 19 but quit) I have tons of energy. Never get hungry. Never get tired. I go to gym 5 times a week. I only eat 1 egg for breakfast


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