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Here's a summary for anyone who needs it:

Key Findings from the Research:

1. Traditional vs. New Understanding:
- Traditionally, high-carb diets were considered essential for optimal athletic performance
- New research challenges this view, showing that low-carb diets can achieve equivalent performance levels after proper adaptation

2. Key Study Details:
- Study examined highly trained athletes (triathletes running 50+ km/week)
- Compared performance on low-carb ketogenic vs. high-carb diets
- Controlled for calories, activity, and body composition
- Used both anaerobic (1-mile time trials, sprints) and endurance tests
- Found no performance difference between diets after proper adaptation period

3. Critical Adaptation Period:
- Previous studies showing performance decrements on low-carb diets often lasted less than 4 weeks
- Research showed 4 weeks is minimum time needed for metabolic adaptation
- At 4 weeks, glycemic control normalized and ketone levels peaked
- Proper adaptation allows for equivalent performance regardless of diet type

4. Carbohydrate Supplementation Findings:
- Traditional recommendations suggest 60-120g carbs/hour during exercise
- Study found much lower amounts (3.4g every 20 minutes) were sufficient
- Small carb amounts prevented exercise-induced hypoglycemia
- Both diet groups showed 22% performance improvement with minimal carb supplementation

5. Fat Oxidation Results:
- Study showed record levels of fat oxidation at high intensities (>85% VO2 max)
- Challenges traditional understanding of the "crossover point" where carbohydrates become necessary
- Demonstrates body's ability to adapt to using fat as fuel even during intense exercise

6. Implications:
- Athletes have more dietary options than previously thought
- High-carb diets aren't mandatory for performance
- Focus should be on preventing hypoglycemia rather than maintaining high glycogen
- Health considerations can take precedence over traditional performance nutrition dogma
- Adaptation period is crucial for success on any dietary approach

7. Additional Insights:
- Carbohydrates may act as a central nervous system stimulant
- Even mouth-rinsing with carbs can improve performance
- Protein intake during exercise may help maintain blood glucose levels
- Hydration and insulin response play complex roles in performance

The research suggests that with proper adaptation, athletes can perform equally well on either high or low-carb diets, challenging long-held beliefs about the necessity of high-carb diets for optimal athletic performance. The key appears to be preventing hypoglycemia rather than maintaining high glycogen levels.

Being fat adapted and keto for over a decade myself I wanted to test just how much energy I had in my fat reserves and with zero carbs. In sep 2023 I did 5 marathons in 5 days completely fasted. 212km during a 5 day fast and I never ran out of energy. I’d never done a marathon before either. My blood sugar remained rock solid the entire time.

I give it about 12 minutes before DeLauer posts a completely contradictory video showing why carbs are actually essential for everyone

i just run a half marathon on being keto for 4months prior with my best time ever. I am 45y

Worked all this out by accident 20 years ago in my 30, i did it out of necessity, hit a wall with weight lifting and sprinting and bag work, stopped carbo loading before weight lifting and sprinting and bag work, found latter in life i was on a keto diet, my performance went through the roof, my trainer kept asking if i was on roids lol

Exercise induced hypoglycemia is the worst feeling uhg. Its scary used to happen to me playing basketball all the time.

As a 2 year carnivore, I tested this the last two weeks with 100grams of rice before my workout. I found no extra energy.

I like how Thomas can’t do 3 videos in a row without contradicting himself 😂

Imagine that 10,000 years ago your ancestors were on a 3 day hunt. They had to run down their prey because in this scenario that was just how it worked. Carbs were not freely available, being as how agriculture was not a thing at this point. Humans being stupid slow like we are, the only option is dogged never ending pursuit until the faster animals collapse from exhaustion. Pretty good bet that we ran mostly on ketones. So none of this surprises me.

I played high level doubles sand volleyball while in ketosis, I would get gassed so quickly but also would stop breathing heavy a few seconds later and be completely back to normal. In general, my performance was worse while in ketosis. I couldn’t jump as high or maintain peak performance in a long rally.

As a vegetarian for 20 years I’m now actively considering returning to eating meat > I changed my diet dramatically 2 years back and include a good amount of animal fat / protein > I’ve not even had a cold since

I  LOVE the devotion to research in these DeLauer videos!  I HATE taking so long to get the detail.  I WISH we got a summary of key findings up front and then had the option to learn more detail.  I WANT  a DeLauer Webpage that allows me to see these research results like illustrated news articles I can see on news sites.  THANKFULLY, someone published in the Comments below a detailed summary of the findings.  That was enough for me.

Thomas you are a great interviewer - you ask a question and then allow your guest to answer it fully without interjecting.

So glad I saw this.I went from pre diabetic to diabetic almost two month ago. Ive been on a pretty strict Ketogenic diet since. Im also a retired 67 years old cyclist . I ride with an older group of cyclists and I still love to sprint and I ride with the faster rider in the club most of the time. The diet has really hurt my performance on the bike as getting dropped and just bonking really badly. I usually average 120 to 150 miles a week. I believe from this video that I was just cutting too many calories . This last week I was able to to put in an extra day of 44 miles in at pretty brisk pace just by eating the same diet but increasing the volume of food. I even forgot my dates that I eat to prolong endurance on that last ride and was able to finish strong anyway. This video was enlightening .

I just turned 50. In my late 40s, I was doing isometrics at home and doing relatively clean keto. I lost about 20 pounds and dropped to about 15% body fat.  During this season, multiple asked me if I was “okay”… was I sick?  It was a bit unsettling.  

About a year and a half ago I joined a gym and pivoted weight training.  My macros the last 4 months have been 25% protein, 40% carbs, 35% fat.  All of this pretty clean.  That is consuming on average 3100 calories per day, but burning about 3200 a day.  I’ve had very good body recomposition and now too many people to count comment on how good I look and say I don’t look 50.  

I am looking forward to getting more bloodwork to see where that is going, but having extra muscle is such a metabolic bonus.  I am almost certain that I lost lean mass on keto and now I have gained about 4 pounds of muscle in the last 4 months and lost 3-4 pounds of fat.  With 40% carbs.

Great content.
Thank you.
Cheers

I always come back to your channel Thomas. You are my rock for relevant information to my health journey!

Thomas once again a quality video. One thing that would be so helpful is at the end of each video, are you able to present a visual summary and narrate it through, thanks.

Been on keto 7.5 years
Best thing I ever did! I train/run/hill sprint 5 days a week minimum. I’m 48 nearly 49 and I’m strongest/fittest Iv  ever been -my push up record is 163 without stopping can run a Mlie in just under 6 minutes and I’m 90 /91 kg
I have to make sure I eat enough fat to fuel my training Ie minimum 300-350 g fat a day and I have 1 day every 3-4 months when I just carb up 800 g carbs  and low fat that day ( as I do a lot of high intensity training which obviously uses  some carbs ) Then back on 300 g + fat a day
Overall best thing Iv ever done and I think the strength and fitness gains on keto the best ( does take 2/3 weeks to adjust from using carbs to using fat as fuel ) more energy overall don’t need quite as much sleep mental clarity improved too and a much healthier way of eating!! Highly recommend!!