Intermittent Fasting Mistakes That Make You GAIN WEIGHT

Dr. Sten Ekberg
26 Apr 202421:17

Summary

TLDRThis video script delves into common pitfalls of intermittent fasting that could lead to weight gain rather than loss. It emphasizes the importance of avoiding overeating after fasting, choosing nutrient-dense foods, and maintaining stable blood sugar levels with a low-carb diet. The speaker also addresses misconceptions about Bulletproof Coffee, the necessity of hydration and electrolytes, the impact of stress and sleep on weight, and the role of exercise in fuel selection. The key takeaway is the need for a sustainable, well-informed approach to intermittent fasting for long-term success.

Takeaways

  • 🍽️ Overeating after fasting is a common mistake that can lead to weight gain, often due to a feeling of deprivation followed by overcompensation.
  • 🔄 Eating the same types of low-quality, processed foods without changing the diet's composition can lead to cravings and poor nutrition during fasting periods.
  • 🚫 High carbohydrate diets can cause blood sugar spikes and insulin release, leading to cravings and an unsustainable energy roller coaster.
  • 🔄 Changing eating habits too quickly or transitioning directly from a standard diet to fasting without adaptation can be challenging and counterproductive.
  • ⚠️ Understanding the impact of diet on blood sugar and energy production is crucial for successful intermittent fasting.
  • 🥑 Consuming a low-carb diet with healthy fats, proteins, nuts, and vegetables can stabilize blood sugar and energy levels, making fasting more manageable.
  • ☕ Bulletproof Coffee can be beneficial in moderation to extend fasting periods, but excessive consumption can add unnecessary calories and defeat the purpose of fasting.
  • 💡 Intermittent fasting should be sustainable and not overly difficult; adopting a lifestyle approach is more effective than short-term, extreme measures.
  • 💦 Dehydration and lack of electrolytes can cause discomfort during fasting, emphasizing the importance of proper hydration and mineral balance.
  • 💤 Poor sleep and high stress levels can increase cortisol, leading to blood sugar imbalances, cravings, and potential weight gain.
  • 🧘‍♂️ Breathing exercises and meditation can help manage stress and support a healthy fasting lifestyle.
  • 🏋️‍♀️ Exercising correctly is important; prolonged high-intensity workouts can lead to anaerobic metabolism, increased cortisol, and potential weight gain.
  • 🚫 Fear of hypoglycemia should be rational, especially for those not on insulin, as the body can adapt to using ketones for energy during fasting.

Q & A

  • What is a common mistake people make with intermittent fasting that could cause weight gain?

    -A common mistake is overeating after the fasting period due to feelings of deprivation, which can lead to overcompensation and consuming low-quality, processed foods.

  • Why does the body crave food during a fast if it is not receiving proper nutrition?

    -The body craves food during the fast because it is not getting the necessary nutrients, leading to a demand for more food to compensate for the lack of quality nutrition.

  • How can a high-carb diet affect blood sugar levels and cravings during intermittent fasting?

    -A high-carb diet can cause rapid spikes in blood sugar levels, followed by insulin release to lower them. This can lead to a roller coaster effect of blood sugar highs and lows, resulting in cravings and difficulty maintaining the fasting state.

  • What are the three factors that can affect blood sugar and energy production when transitioning to intermittent fasting?

    -The three factors are eating too high of a carb diet, changing eating habits too quickly, and transitioning directly from a low-fat, high-carb diet to intermittent fasting.

  • Why is it recommended to consume a low-carb diet with intermittent fasting for better energy production and blood sugar stability?

    -A low-carb diet with intermittent fasting helps to stabilize blood sugar levels and provide steady energy production, making it easier to fast for longer periods without experiencing energy drops or cravings.

  • What is Bulletproof Coffee and how can it be misused during intermittent fasting?

    -Bulletproof Coffee is a beverage made with coffee, butter, and MCT oil. It can be misused during fasting by consuming it in excessive amounts, turning it into a meal replacement and negating the fasting state.

  • How can dehydration and lack of electrolytes affect the body during fasting?

    -Dehydration and lack of electrolytes can lead to imbalances in the body's fluid regulation, potentially causing fatigue, dizziness, and difficulty in maintaining the fasting state.

  • What is the relationship between poor sleep, high stress, and weight gain during intermittent fasting?

    -Poor sleep and high stress can elevate cortisol levels, which can lead to increased blood sugar and insulin levels, promoting metabolic imbalances and potentially causing weight gain.

  • How can exercising incorrectly during intermittent fasting lead to weight gain?

    -Exercising at too high an intensity for too long can shift the body from burning fat to carbohydrates, leading to increased cortisol and insulin levels, cravings, and potential weight gain.

  • What are some strategies to deal with stress and help the body reset during intermittent fasting?

    -Breathing exercises and meditation can be effective strategies to manage stress, helping the body to reset and maintain a healthy balance during fasting.

  • Why is it important to have a good understanding of how the body works when practicing intermittent fasting?

    -A good understanding of the body's processes helps to set realistic expectations and avoid common mistakes, leading to better adherence to the fasting regimen and long-term success.

Outlines

00:00

🍽️ Common Mistakes in Intermittent Fasting

This paragraph discusses the pitfalls of intermittent fasting that may lead to weight gain instead of loss. It highlights overeating after fasting due to feelings of deprivation, consuming low-quality and processed foods, and the lack of proper nutrition which can lead to cravings. The paragraph also addresses three interconnected issues: a high-carb diet during fasting, making sudden changes in eating habits, and transitioning directly from a standard diet to intermittent fasting without considering the impact on blood sugar and energy production. The importance of understanding how these factors affect the body is emphasized, along with the suggestion to consider a low-carb diet combined with intermittent fasting for better results.

05:05

☕️ The Bulletproof Coffee Controversy

The second paragraph delves into the Bulletproof Coffee trend, explaining its role as a tool in intermittent fasting rather than a standalone benefit. While it can help extend fasting periods by providing a small insulin boost, overconsumption can lead to excessive calorie intake, effectively negating the fasting state. The paragraph warns against turning Bulletproof Coffee into a meal replacement and emphasizes the importance of moderation. It also touches on the cumulative caloric impact of adding various ingredients like butter, MCT oil, and heavy cream to the coffee.

10:09

💪 The Importance of Lifestyle and Hydration in Fasting

This paragraph focuses on the importance of sustainability in intermittent fasting and the pitfalls of making it too difficult, which can lead to quitting and regaining weight. It also discusses the role of dehydration and electrolyte balance in fasting, explaining how a lack of electrolytes can affect the body's fluid regulation. The paragraph introduces euLyte, a product designed to support fasting by providing necessary electrolytes, and stresses the importance of proper hydration and electrolyte intake to avoid complications during fasting periods.

15:11

😴 Sleep, Stress, and Their Impact on Fasting

The fourth paragraph examines the impact of poor sleep and high stress levels on fasting, explaining how these factors can lead to elevated cortisol levels, which in turn raise blood sugar and insulin, promoting metabolic imbalances. It discusses the historical purpose of cortisol in response to danger and the modern issue of stress without physical exertion, leading to fat storage and increased cravings. The paragraph suggests breathing exercises and meditation as effective ways to manage stress and support a successful fasting lifestyle.

20:17

🏋️‍♂️ Exercise and Fuel Source Management in Fasting

This paragraph discusses the relationship between exercise, fuel sources, and fasting. It explains the difference between aerobic and anaerobic exercise in terms of energy production and the body's reliance on fat or carbohydrates. The paragraph emphasizes the inefficiency of glycolysis compared to fat oxidation for energy and the resulting increase in cortisol and insulin levels during anaerobic exercise. It also differentiates between the benefits of high-intensity interval training and the potential drawbacks of prolonged anaerobic exercise, advising on the importance of understanding and managing exercise intensity during fasting.

🚫 Overcoming Fears and Misconceptions About Fasting

The final paragraph addresses common fears and misconceptions about fasting, particularly hypoglycemia. It explains that the body can adapt to using ketones as an alternative fuel during fasting, reducing the need for blood glucose. The paragraph reassures that moderate drops in blood glucose are not problematic for most people, especially if they feel good and are fat-adapted. It also provides guidance for type 2 diabetics on insulin and emphasizes the importance of listening to one's body and adjusting fasting practices accordingly. The paragraph concludes with a call to action for viewers to educate themselves further on intermittent fasting to ensure long-term success.

Mindmap

Keywords

💡Intermittent Fasting

Intermittent fasting is an eating pattern where individuals cycle between periods of eating and fasting. It is a popular method for weight management and has been shown to have health benefits beyond weight loss. In the video, it is the central theme, discussing common mistakes people make while practicing it that could lead to weight gain instead of weight loss.

💡Overeating

Overeating refers to the act of consuming more food than the body requires in a given period. In the context of the video, overeating after a fasting period is highlighted as a mistake that people make, which can counteract the weight loss effects of intermittent fasting due to feelings of deprivation.

💡Nutrition

Nutrition encompasses the intake of nutrients necessary for health and growth. The script emphasizes the importance of proper nutrition during the eating windows of intermittent fasting, noting that consuming low-quality and processed foods can lead to increased cravings and overeating.

💡Carbohydrates

Carbohydrates are one of the main macronutrients that provide energy to the body. The video discusses the impact of high-carb diets on blood sugar levels and insulin production, suggesting that a high intake of carbohydrates can lead to unstable blood sugar levels and difficulty in fasting.

💡Insulin

Insulin is a hormone that regulates blood sugar levels by allowing glucose to enter cells. The video explains how a high-carb diet can lead to increased insulin production, causing blood sugar spikes and crashes, which can make fasting more challenging and lead to overeating.

💡Blood Sugar Roller Coaster

The term 'blood sugar roller coaster' describes the fluctuation of blood sugar levels that can occur with a high-carb diet, leading to cravings and difficulty in maintaining energy levels. The video uses this concept to explain why a low-carb diet can be beneficial during intermittent fasting.

💡Bulletproof Coffee

Bulletproof Coffee is a beverage made with butter, MCT oil, and heavy cream, often consumed during fasting for its energy-boosting properties. The video script discusses the potential for overconsumption of Bulletproof Coffee, which can lead to increased calorie intake and negate the effects of fasting.

💡Electrolytes

Electrolytes are minerals that help maintain fluid balance and support various bodily functions. The video mentions the importance of electrolytes in preventing dehydration during fasting, with a focus on sodium, potassium, magnesium, and calcium.

💡Cortisol

Cortisol is a hormone associated with the stress response, which can increase blood sugar levels. The video explains how poor sleep, high stress, and certain types of exercise can lead to elevated cortisol levels, potentially causing weight gain and metabolic imbalances.

💡Aerobic and Anaerobic Exercise

Aerobic exercise is physical activity that uses oxygen to meet energy demands, typically at a moderate pace, while anaerobic exercise involves short bursts of intense activity that relies on carbohydrates for energy. The video emphasizes the importance of understanding the body's fuel sources during exercise to optimize fat burning and avoid excessive cortisol production.

💡Hypoglycemia

Hypoglycemia refers to low blood sugar levels, which can cause symptoms like dizziness and confusion. The video addresses concerns about hypoglycemia during fasting, explaining that the body can adapt to using ketones for fuel, reducing the need for glucose.

💡Lifestyle Change

A lifestyle change involves adopting new habits and behaviors for long-term health benefits. The video concludes by emphasizing the importance of understanding intermittent fasting and making it a sustainable lifestyle change rather than a temporary diet.

Highlights

Common mistakes in intermittent fasting can lead to weight gain instead of loss.

Overeating after fasting due to feelings of deprivation is a typical mistake.

Continuing to consume low-quality and processed foods during fasting can lead to nutritional imbalances.

High carbohydrate diets can cause blood sugar spikes and cravings, impacting intermittent fasting effectiveness.

The body's dependency on high carbohydrate foods can disrupt energy levels and mood during fasting.

Transitioning too quickly to intermittent fasting without adjusting diet composition can be problematic.

A low-carb diet combined with intermittent fasting can stabilize blood sugar and energy production.

Bulletproof Coffee can be beneficial for extending fasting periods but should be consumed in moderation.

Overconsumption of Bulletproof Coffee can add unnecessary calories and defeat the purpose of fasting.

Intermittent fasting should be sustainable and not perceived as a difficult, painful process.

Dehydration and lack of electrolytes can lead to feelings of weakness during fasting.

Proper sleep and stress management are crucial for the success of intermittent fasting.

Excessive cortisol levels due to stress or poor sleep can lead to weight gain and cravings.

Breathing exercises and meditation can help manage stress and support fasting.

Exercising incorrectly by engaging in prolonged high-intensity workouts can hinder fat burning and increase cortisol.

Aerobic exercise supports fat burning, while anaerobic exercise shifts the body to carbohydrate use.

Hypoglycemia fear can be unfounded for those not on insulin, as the body adapts to using ketones for energy during fasting.

Type 2 diabetics on insulin need to be cautious with fasting to avoid dangerous blood sugar drops.

Education and understanding of how the body works during fasting are key to developing a successful intermittent fasting lifestyle.

Transcripts

play00:00

"Hello, Health Champions! Today, we're going to  talk about some common mistakes that people make  

play00:04

with intermittent fasting that could actually  make you gain weight instead of losing it. So,  

play00:10

let's make sure that you don't make any of  these. One common mistake that people make  

play00:15

is that they overeat after the fast, and that  is because they feel deprived in some form,  

play00:22

and then after the fast, they overcompensate and  they overeat. Usually, this comes down to some  

play00:27

very common factors, and if they don't really  change what they're eating, they're just eating  

play00:34

the same types of food but they're restricting  the window, and a lot of those foods are going  

play00:39

to be low quality and processed foods. Now,  the body isn't getting the proper nutrition,  

play00:45

so it's going to be screaming for food during  the fast, and then you overcompensate after,  

play00:50

and then there are three things that go hand in  hand. So we're going to cover those together.  

play00:55

One is that you eat too high of a carb diet; you  keep eating high carb even when you're fasting.  

play01:01

One is that you change too quickly from what you  were doing, and the third is that you go directly  

play01:09

from a low-fat, high-carb diet—a standard  diet—straight into intermittent fasting. So,  

play01:14

we need to understand how those three factors  affect blood sugar and energy production. So,  

play01:20

when you eat a high carbohydrate diet, your blood  sugar will rise very quickly, and then the body  

play01:27

releases insulin to bring it down because the  body doesn't like high blood sugar. Really high  

play01:32

and really low blood sugar is very dangerous,  so it's going to produce a lot of insulin that  

play01:38

brings the blood sugar down, and then when it's  low, now you get cravings and you eat again,  

play01:44

and so forth. So you keep getting this blood  sugar roller coaster, and this is very much  

play01:49

related to processed foods, to high sugar foods,  and to high carb foods. And what happens then  

play01:56

is that you train your body to depend on these  blood sugars spikes, because when they're low,  

play02:02

you feel bad. So now, you eat more, but then as  soon as the blood sugar is high, your body has to  

play02:08

use up that energy and bring that blood sugar  down, so you get stuck in this dependency on  

play02:16

high carbohydrate foods and cravings. And then  if you go straight into intermittent fasting,  

play02:21

your body doesn't know where to get the energy,  and then you have high energy when the blood sugar  

play02:27

is high, you have low energy and low mood when  it's low, and that's not sustainable. Whereas,  

play02:33

if you instead eat a low-carb diet with your  intermittent fasting plans, now as you also eat  

play02:42

real food with protein and fat, nuts and seeds,  meat, vegetables, now your blood sugar swings are  

play02:50

going to be almost non-existent. You have a very,  very stable energy production, and now it's very  

play02:58

easy to go eight hours, 16 hours without food,  and you're not going to lose energy, and you've  

play03:04

trained your body into using fat for energy, and  that's what your body uses when you fast. So it's  

play03:11

not necessary for everyone to go low carb when you  do intermittent fasting. Some people pull it off  

play03:18

even though they eat relatively high carb, but for  a lot of people, they're not going to manage it;  

play03:23

they're not going to succeed eating high carb  because it's going to be too difficult for them,  

play03:29

and for most people, it's going to be much, much  easier to do intermittent fasting and continue  

play03:36

and have long-term success if you keep your blood  sugar much more level with low-carb foods. Another  

play03:43

problem can be Bulletproof Coffee, and don't get  me wrong, I am a fan of Bulletproof Coffee, but  

play03:50

we can't let it get out of hand, and we have to  understand that it's a tool; it's not a benefit,  

play03:58

meaning that if you compare Bulletproof Coffee  to fasting completely, then it's not better;  

play04:06

it doesn't do anything additionally that fasting  alone couldn't do. And the most common question I  

play04:12

get is, does it break a fast? And does it raise  insulin? And does it break a fast? Absolutely,  

play04:20

it breaks a fast because a fast is when  you're not eating anything, but the benefit,  

play04:26

the good thing about it is that it raises insulin  just a tiny, tiny bit; it raises it so little,  

play04:34

so it's almost like you didn't eat. And I am a fan  of Bulletproof Coffee if it helps you go longer.  

play04:42

So if you were getting tired, and you got listless  or nauseous, or whatever, or you just felt like  

play04:49

you really had to have something, and then the  question was, am I going to eat or can I get  

play04:56

another four, six, or eight hours of fasting until  dinner? Will it help me do OMAD, one meal a day,  

play05:05

if I have some Bulletproof Coffee? Because then,  it's a good thing. It just gets a little blip on  

play05:12

your insulin, and then you're back to fasting.  The problem is when it becomes a fad and a trend,  

play05:18

and people don't understand where it fits  in to fasting. So now, we have thousands of  

play05:24

people putting up recipes online about all these  great things, and people are having one, and two,  

play05:31

and three Bulletproof coffees because they think  more is better; that if Bulletproof Coffee is okay  

play05:37

or if it's good, then more must be better.  They put butter in there, they put MCT oil,  

play05:44

and heavy cream, and I've even seen recipes with  egg and collagen, and none of those are horrible,  

play05:52

but they're not really necessary either, so you  just do enough to get you by. And if you have two  

play06:00

tablespoons of butter, for example, now that adds  a couple of hundred calories. A tablespoon of MCT  

play06:07

oil is 120 calories. Two tablespoons of cream is  another 100 calories. One egg is 80 calories, and  

play06:16

a scoop of collagen powder would be probably about  50 calories. So I think it's okay if Bulletproof  

play06:22

Coffee has 200, 250 calories; that's great.  But if you have four, 500 calories and you have  

play06:29

a couple of those a day, now that's a meal; that's  two meals, and you're not really fasting anymore,  

play06:36

and the fat is there to carry you over, not to  have you eat so much fat that your body has no  

play06:44

reason to burn it off, the body. So that's where  Bulletproof Coffee can be a problem when it gets  

play06:50

out of hand, when it becomes a meal. Now, there  are two kinds of mistakes that could make you  

play06:55

gain weight with intermittent fasting, and the  first two things we talked about are things like  

play06:59

overeating and too much Bulletproof Coffee, that  could actually make you gain weight directly.  

play07:05

But then, the other way is if you make it  so hard that you're going to quit. If you  

play07:11

don't understand to turn this into a lifestyle  that is sustainable, now, if you quit fasting,  

play07:19

intermittent fasting, now you gain the weight back  because you're not doing the right things anymore,  

play07:24

and intermittent fasting is not supposed  to be hard. But we have this mentality  

play07:30

that of no pain, no gain. We go to the gym, and  if it's not hurting, it can't be good, right? But  

play07:37

then, that mentality sometimes carries over, and  now we think that it's the hunger that's going  

play07:42

to give us the results, and we feel absolutely  terrible, and we say, 'Oh my God, I'm both hungry  

play07:50

and I feel deprived, and then I must be doing  it right.' And we got to get past that kind of  

play07:57

thinking. All right, it's not supposed to be hard;  if it's too difficult, if we feel miserable, then  

play08:04

we're not going to turn it into a lifestyle, and  then we fail. Another thing that can make us feel  

play08:10

really bad is dehydration, and the two parts to  that: one is that we're not drinking enough water,  

play08:17

but the second part is that we're not taking  enough electrolytes because electrolytes are  

play08:22

charged little particles, little molecules that  bind water, that hold the water, so the body  

play08:30

uses electrolytes to regulate fluid balance in the  body. And if we're not taking any, then we can be  

play08:36

losing water even though we're drinking a lot of  water. And the most important electrolyte to take  

play08:42

is just salt, plain salt, called sodium chloride.  I do recommend typically that you get sea salt or  

play08:50

pink Himalayan salt; those are my favorites.  But then, it's also a really good idea that  

play08:56

if you supplement also with some potassium, some  magnesium, and some calcium, as well as some trace  

play09:03

minerals, especially if you end up doing a little  bit more intermittent fasting on a regular basis,  

play09:09

or maybe you go a little bit longer once in a  while, like more than 24 hours. And because this  

play09:14

is such a common problem, I developed a product to  support fasting called euLyte, and I'll put a link  

play09:21

down below if you want to check that out. Another  thing that can actually make you gain weight is  

play09:26

poor sleep, and hand in hand with that is high  stress because anytime you wake up after poor  

play09:34

sleep or insufficient sleep, now your cortisol is  going to be elevated, and the same thing with any  

play09:42

type of stress, anytime that your body perceives  that you are in danger, then you're going to be  

play09:49

activating the fight-flight response. And anytime  that your body perceives danger, it thinks, 'Well,  

play09:56

I might have to run if there's a bear or a tiger  around the corner, then I might have to run.'  

play10:02

So I might need a little extra blood sugar,  and that's what the cortisol is for. Cortisol  

play10:08

raises that blood sugar, and historically, that  was a great thing because we are in danger,  

play10:17

we raise the blood sugar, and now the muscles  will absorb that blood sugar, and then we move,  

play10:24

we run, we fight, and we use up that blood sugar.  That's the purpose, that's the balance that resets  

play10:32

everything. But modern people, we don't get  that movement. We are feeling stressed, sitting  

play10:38

in a car; we're feeling stressed, sitting at a  desk; there's no additional energy expenditure,  

play10:46

and now that cortisol raises blood sugar, and  now, with that extra blood sugar and no movement,  

play10:53

the body also raises insulin, and now we're  promoting metabolic imbalances with that extra  

play11:01

stress and that extra cortisol. And of course,  when you don't move, and you handle that elevated  

play11:06

glucose with insulin, now that glucose is going to  turn into fat, and whenever insulin is elevated,  

play11:14

and we store it as fat, now we can't retrieve it,  and we get hungry. So now we end up eating more,  

play11:21

we get more cravings, and that's what happens with  excess cortisol. And two really powerful ways to  

play11:28

deal with this stress to help the body reset is  to do some breathing exercises and to do some  

play11:36

meditation. And it doesn't take very long if you  get your body used to doing this, and you notice  

play11:43

that you're feeling a little stressed, you could  take 30 seconds of breathing exercises and reset  

play11:49

the body. Another problem is if we exercise wrong.  So one thing could be if we just exercise too  

play11:56

much, period, but very commonly, we just exercise  at too high a level for too long, and that matters  

play12:05

because we use the wrong type of fuel. And we  really want to understand that it's not about  

play12:11

calories. Everywhere you look, there's such stupid  advice that if you eat a cookie with 100 calories,  

play12:18

then you have to walk so many minutes, or you  have to run so many minutes; that is just not  

play12:24

how it works at all, get that out of your head  forever. What you try to do is to burn fat,  

play12:31

and you burn fat during aerobic exercise. Whenever  you switch to anaerobic exercise, now you're  

play12:39

shifting from fat-burning to carbohydrates because  anytime that you get into anaerobic exercise,  

play12:46

you're going to be shifting to a fuel source  called glycolysis. And here's how that works.  

play12:52

So let's say that you're in pretty good shape,  and you have a resting heart rate of about 60,  

play12:59

and let's say that at rest, you're using up that  much energy, and then as you start exercising,  

play13:07

your body needs more energy. And this energy comes  primarily from burning fat and using oxygen. So  

play13:14

the blood provides that oxygen, you're oxidizing  the fat, and you're making energy, and then as  

play13:22

you make more, more, more energy, your heart  rate goes up so you can provide more oxygen. So  

play13:29

once you get to about 120, you're close to maxing  out how much oxygen the blood can carry. So here,  

play13:39

you have doubled your heart rate, but you've  also increased how much blood is pumped for  

play13:44

every heartbeat because the heart stretches  a little bit. So now, you're pumping about  

play13:50

three to four times as much blood, and here,  there's still enough oxygen to completely cover  

play13:59

the need to make energy. So far, you are  in what we're calling aerobic, with air,  

play14:07

that all the energy is covered by oxygen supplied  in real-time. But now, if you start going faster,  

play14:16

now your heart rate is going to increase further,  and that's a sign that once you start huffing and  

play14:22

puffing, now you're not taking in the blood  cannot deliver enough air, enough oxygen.  

play14:29

So anything above here is going to be anaerobic,  and now you're not burning primarily fat anymore,  

play14:40

now you're still burning the same amount of fat  at the bottom as the base, but anything extra,  

play14:46

you're going to be using carbohydrate, and  you're switching to another energy pathway called  

play14:52

glycolysis. And the way you can tell is that  you're huffing and puffing, your muscles start  

play14:57

burning because this glycolysis, you're breaking  down glucose, and you turn that into lactic acid,  

play15:04

that burn in the muscle, that's the lactic acid  from anaerobic metabolism. And now the problem  

play15:11

is that fat burning with oxygen is very, very  efficient because you're going to be producing  

play15:18

38 ATP per unit of energy that you're using up per  unit of fat, but when you switch to glycolysis to  

play15:29

carbohydrate, now you're only getting two ATP. So  to get this extra energy, you're going to be using  

play15:38

up a lot of carbohydrate fairly quickly, and if  you're using up carbohydrate quickly, what is the  

play15:45

body have to do? It has to look for more. So now,  you're making cortisol at a very high level. So  

play15:53

anytime that you get into this zone, you're going  to automatically kick in the cortisol at a pretty  

play15:58

high level. Now, even though you're making massive  amounts of cortisol, this can be beneficial if  

play16:04

this anaerobic is very, very brief; that's called  high-intensity interval training. So if you do  

play16:11

that all out, like a maximum effort for about  30 seconds, and you keep the total of intervals  

play16:18

down to just a few minutes, now you're getting  tremendous benefits, and the drawback is not so  

play16:26

much because even though you're in this anaerobic  zone, it's such a short time that the benefits far  

play16:34

outweigh the drawbacks. However, if you go to a  spin class, or if you go huffing and puffing, or  

play16:41

you do something for 30, 40 minutes, or an hour,  now you spend so much time in that anaerobic zone,  

play16:49

you're making so much cortisol that you're also  going to drive up your insulin. And when you do a  

play16:55

lot of this, you also will get increased cravings  to replenish all of that carbohydrate that you  

play17:02

used up. So we have to understand that if we do  things the hard way, that if we struggle and make  

play17:09

it complicated and difficult, then we all end up  quitting, whereas if we learn how to do it right,  

play17:15

now you can set yourself up for long-term success  for a lifestyle change. Another problem can be  

play17:22

hypoglycemia, and for the most part, it's not  the hypoglycemia itself that's kind of rare that  

play17:29

it becomes a problem, but it is the fear; it's  an inappropriate fear sometimes. Like someone  

play17:36

asked me, how do I do this? Every time I try to do  one meal a day, my blood glucose drops below 70,  

play17:46

and I have to eat something because we've  heard, we've been warned, we've been scared  

play17:51

of hypoglycemia like that's a terrible thing. But  when you're fasting, you're burning mostly fat,  

play17:59

and when you're mostly in fat burning, especially  if you're low carb, now you make ketones, that's  

play18:05

an alternate fuel. So your body doesn't need  as much blood glucose, and it's not a problem.  

play18:12

When I do a longer fast, I sometimes get down into  the 50s. I know a lot of people get into the 40s,  

play18:19

and as long as you feel good, it's not a problem.  But I want to tell you about a study that they  

play18:24

did one time, where they took a group of young,  healthy men, and they fasted them for three, four,  

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five days, and their blood glucose levels were  at in the 40s and 50s, and then they injected  

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them with insulin to force the blood glucose  dramatically low, just to see what happened. And  

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they got one guy got the glucose down to nine, and  most of them were between 15 and 20, and nothing  

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happened. None of them displayed symptoms of  hypoglycemia; they still felt good because their  

play19:05

bodies, their brains, were running on ketones.  So your body doesn't need as much glucose when  

play19:13

you're fat-adapted, and when you're fasting. But  the people who really need to be careful about  

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hypoglycemia are type 2 diabetics on insulin  and type 1 diabetics who are also, obviously,  

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on insulin. If you're not on insulin, then all  you have to do is to pay attention to how you feel  

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because if you're a type two diabetic, if you're  taking insulin, and you stop eating, now that  

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insulin will be just like the study I mentioned,  it will force the blood sugar super, super low,  

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and that can be dangerous if you're not used to  fasting. But if you're not on insulin, then you  

play19:52

just have to pay attention to how you feel. Are  you feeling good? Are you clearheaded? You have  

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energy, or are you dizzy? Are you lightheaded?  And if you start feeling off in any way,  

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then the first thing that you do is you drink some  water, and you have some salt or some electrolytes  

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with it, and if it doesn't pick up almost  immediately where you're feeling better, then  

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you go eat something. And then, next time that you  try intermittent fasting again, you go a little  

play20:23

bit slower at it, or you make sure that you're a  little better fat-adapted, and you follow all the  

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other rules that we talked about. But the biggest  reason people fail to develop a lifestyle of  

play20:35

intermittent fasting is probably that they don't  understand enough about it; if they have a lack  

play20:40

of knowledge, if they don't understand how the  body works, then you just need to study a little  

play20:46

bit more because more understanding of these  things will create a better expectation, a more  

play20:53

realistic expectation. And the best way to gain  a better understanding is, of course, to watch  

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a lot more of my videos, and if you enjoyed this  video, you're going to love that one. And if you  

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truly want to master health by understanding how  the body really works, make sure you subscribe,  

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hit that bell, and turn on all the notifications,  so you never miss a life-saving video."

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