
Hello friends!
I'm Dr. Karen, and I’m thrilled that you’ve decided to join me to learn more about intermittent fasting and how to apply this powerful lifestyle intervention to improve your health, wellness, vitality, and live a long and fruitful life.
As a general practitioner and lifestyle medicine specialist, I often prescribe intermittent fasting as an intervention for many of my patients to help improve blood sugar control, weight management, inflammation, gut health, and mental health. It has vast applications in my clinical work.
Personally, I practice intermittent fasting regularly because it’s not only powerful for health improvement but also incredibly flexible and convenient.
Obviously, you’ve joined this course because you have an idea of how intermittent fasting might improve your life and well-being. Now, I’d like you to take a few minutes to reflect on why you’ve decided to take on this intermittent fasting journey.
Actually write down the reasons—think of 10 ways intermittent fasting can potentially improve your overall well-being. This exercise is powerful because it sets your mind with the intention to benefit from this lifestyle. We’ll revisit these reasons during and at the end of the course to ensure you’ve achieved your goals.
Take a moment now: Grab a pen and paper, and write down 10 reasons why you’re learning about intermittent fasting.
This comprehensive course on Intermittent Fasting is divided into modules, each with a unique focus.
There’s a major section on nutrition, and there’s a very specific reason for this.
When making lifestyle changes to improve health, nutrition is key. Take weight management, for example: about 80% of your success depends on what you eat, while exercise, sleep, and stress management account for the remaining 20%.
For inflammation and gut health, nutrition is also vital. I’ve included a standalone section on healthy eating and nutrition basics—it’s essential for success. However, if you’re eager to dive into the physiology and practical application of fasting, you can skip ahead and return to the nutrition section later.
Each course module includes downloadable resources to reinforce what we discuss. For every video, you’ll find transcripts, which you can print and annotate as needed. There are also cheat sheets for hydration, healthy fats, and carbohydrates, which you can print or save.
Occasionally, you’ll find quizzes to test your memory and reinforce learning.
If you have questions at any point, please reach out. The goal is to build a community of people committed to learning and applying intermittent fasting principles for health benefits.
Over the years, I’ve learned more from my patients than from any textbook. Sharing experiences helps everyone improve and avoid mistakes.
Throughout the course, you’ll find homework exercises to apply what you’ve learned. Please share your progress, successes, and challenges within the community.
I wish you great success on your intermittent fasting journey. Remember, I’m here to support you, so don’t hesitate to reach out. If you are unsure about anything during this course, you are welcome to contact me and share your concerns in the chat.
Wishing you success, happiness, health and vitality through Intermittent Fasting!
In this first theoretical session, you will learn that fasting is encoded into our DNA. As humans, we have had to evolve to survive for long periods of time without easy access to food.
Our modern life situation where high-calorie food is readily available does not suit or metabolic blueprint. Eating too much, too often and eating the wrong foods is responsible for the majority of health problems.
There are some myths and mis-conceptions about intermittent fasting like 'Fasting is just another fad diet', 'Fasting is not sustainable... as soon as you stop fasting, you gain weight', or 'Fasting causes stomach ulcers'.
You will see that fasting is a safe and science-backed lifestyle strategy for long-term health and well-being.
While most people know that fasting is useful as a weight loss and weight management tool, it has other fantastic health benefits:
Anti-inflammatory
Gut-health
Anti-cancer
Anti-ageing
Cognitive functioning
To harness and maximise these beneficial effects of intermittent fasting, you need to understand how it works and you need to apply fasting in a strategic and specific way.
I will share a real-life case study with you of one of my patients, who started fasting and achieved some tremendous improvements in her overall health.
Fasting is not for everyone. For some people, the benefits of practicing fasting do not outweigh potential risks or side-effects. I'll outline who should not fast, and explain when we need to take extra care when practicing Intermittent Fasting.
If you have any concerns about whether Intermittent Fasting is right for you, do not hesitate to contact me in the chat.
You've heard of insulin, the hormone released by your pancreas which is responsible for keeping your blood sugar in balance. But, do you actually understand how it works?
In this session, you will learn (in simple terms) exactly how insulin helps to control your blood sugar level... by transporting sugar molecules from your blood into your body cells where the sugar can either be used for energy, or converted to fat.
You will discover that insulin is an inflammatory hormone that makes you feel tired, hungry and heavy. And, it will become clear to you that having a high insulin level is BAD because insulin encourages fat storage, increases appetite and drives chronic inflammation. High insulin is associated with diabetes, fatty liver disease, dementia, menstrual and fertility problems and so many other health risks.
You’ll see that Intermittent Fasting has the power to lower your insulin level, improve your blood sugar metabolism, facilitate weight loss through fat burning and improve your overall health.
Now that you understand how insulin works at the level of your body cells and how insulin impacts your overall metabolism, it’s essential that you know which foods impact your insulin.
You have control over your insulin through the foods you eat.
In this session you will see how different food groups are digested into base molecules:
· CARBOHYDRATES are digested to SUGARS
· PROTEINS are digested to AMINO ACIDS
· FATS are digested to FATTY ACIDS and GLYCEROL
Only SUGARS have an effect on insulin and therefore if you reduce your carbohydrate and sugar intake, you can reduce your insulin.
Controversy exists around the connection between calories and weight. In this session, you will understand the concept of energy density which is very important because it relates to how much energy is in a volume of food.
Although ‘a calorie’ is not always ‘a calorie’ because certain foods are high in healthy calories and won’t make you fat (avocadoes, for example) it is useful to understand that you can eat larger volumes of foods that are less energy-dense.
With this in mind, I’ll explain why it’s a complete waste of your time to count calories and try to achieve a precise calorie-deficit if you want to lose weight. In real life, there is no accurate way to know how many calories are in a food, how many of those calories you will absorb, or how many calories you are burning through your basal metabolism and physical activity.
Moral of the story: Understand the concept but don’t waste precious energy on calorie-counting!
During the 1960's and 1970's, academic research on how the food we eat affects our health was done by scientists at a very prestigious medical school in the US (which means everyone around the world paid close attention to the findings of this research).
The scientists studied thousands of people and followed them over a long period of time, looking for clues as to why some people suffered heart attacks and others didn't. At the end of the study, the scientists were facing a tricky situation. There were 2 important factors that had some association with heart disease: Cholesterol and sugar.
Interestingly, one of the sponsors of the research (the guy who pays the scientists' salaries) was the sugar industry... so it wouldn't be easy to blame the generous benefactor for causing the problem in question. So, dietary fat and cholesterol levels were blamed for heart disease.
After this research was published, the American Dietetics Association published guidelines for healthy eating. The recommendation was that all meals should be based on a foundation of carbohydrates (for energy). We should eat lean protein, have our 5 fruit and veg a day, and stay away from fat of any kind because fat was dangerous. Fat caused heart attacks. Fat would make us fat.
So, low-fat and fat-free food products started flooding the super-market shelves. But, unfortunately when you remove fat from food, you make it flavourless and change the texture. So, food manufacturers added sugar, and flavourants and artificial emulsifiers and texture enhancers... all to make these 'healthier' foods taste OK.
The result: More fat people. More diabetes. More heart disease and strokes. More dementia. More learning difficulties in kids. Sugar and food addiction. The health of the world took a nose-dive.
Now we know that sugar is the main culprit for causing chronic health problems. But, we have to change our mindset, our love for sweetness, and break away from the fear that eating fat will make us fat and unhealthy.
The truth: Carbohydrates are not essential for health. Your body is less than 2% carbohydrate. You can manufacture glucose from proteins and fats in order to maintain a normal blood sugar level and give your brain the glucose it needs to function happily.
The only essential carbohydrate is fibre (found in all vegetables and fruit) which cannot be digested or absorbed in our intestine, but serves as the main fuel source for the healthy bacteria that live in our gut.
All carbohydrates digest to sugar. And sugar is BAD. So, when you eat carbohydrates, you have to understand the metabolic effect of that carbohydrate and what benefits you can possibly get from eating the carbohydrate, that will outweigh the negative effects of sugar.
In this session, I'll explain carbohydrate metabolism in detail. And, you will discover that there are good carbs and bad carbs. You'll learn about the Glycaemic Index and Glycaemic Load of foods. You'll understand why eating whole fruit is much better for you than drinking fruit juice.
The aim is to make you aware that your carbohydrate choices are essential to your well-being and success with intermittent fasting.
You've learnt that starches are large complex structures made up of individual sugar molecules. When you eat a carbohydrate (any carbohydrate), it quickly breaks down into sugars which can easily be absorbed into your blood.
You know that you get GOOD CARBS and you get BAD CARBS. The GOOD CARBS have some additional nutritional benefit - they contain other good stuff besides energy (like protein, vitamins, minerals or fibre). The BAD CARBS are generally refined and stripped of all beneficial nutrients so they do not offer any health benefit and you should ideally avoid them.
In this session, I'll go into detail on how to make healthy carbohydrate choices. You'll also get a handy tip to use when cooking carbohydrates that makes them slower to digest and absorb. You'll discover why FIBRE is the only ESSENTIAL carbohydrate, and why gluten-free is not always better for everyone.
You'll find a downloadable list of healthy carbohydrates in the resources section :)
Fibre is overlooked as an ESSENTIAL nutrient. Most of us don’t get enough fibre in our normal day-to-day diets. We know that eating more fibre makes your digestive system more efficient and keeps you regular. But, fibre also helps maintain the health of your microbiome which has benefits for your mood, immune system and longevity.
Learn about different types of fibre and which foods you should include more often in your diet to achieve your recommended daily fibre goals.
Your body is composed of:
· 60-70% water
· 15-20% protein
· 12-20% fats
· 5-7% minerals
· 1-2% carbohydrate
Protein is extremely important as one of the main structural components of your body. All your cells comprise protein. Proteins are dissolved in your blood to carry important nutrients around your body. Many hormones and chemical messengers are proteins.
In this session, you will learn the differences between animal-based protein and plant-based protein. Discover the benefits of including more plant-based proteins in your diet. And, understand how much protein you need to eat on a daily basis to maintain optimal metabolism in your body.
Remember that when you eat an egg that weighs 40g, you will only be getting 7-8g of protein. 100g of chicken breast will give you 31g of protein. It’s useful to know how much protein is in protein-based foods you eat often so you can ensure your achieve sufficient protein intake.
Remember also that protein and amino acids cannot be stored in your body, so if you have excessive protein intake, the amino acids that are not used for repair or other functions will be converted to glucose and stored as fat.
So, it’s important to get enough protein, but not too much.
You can download a handy reference list of high-protein foods so you can optimise your protein intake.
I encourage you to calculate your daily protein requirement according to your weight and physical activity level... and see if you are getting the protein you need.
Eating fat does NOT make you fat. Research done in the 1960’s and 1970’s suggesting that fat intake was bad and associated with weight gain, heart disease and other health problems was biased and has been disproved. We know that since the dietary guidelines were published which recommended a high-carb, low-fat diet… there has been a surge of diabetes, heart disease, stroke, dementia, cancer and other inflammatory conditions.
Cutting out the fat was WRONG!
In this session you will learn about different types of fat:
· GOOD FAT: Natural, unprocessed oils and fats that are heart-healthy and anti-inflammatory
· BAD FAT: Saturated animal fats that can be bad (for some people)
· UGLY FAT: Toxic, poisonous fats that are downright dangerous and should be avoided at all costs
Most of us can benefit from including more healthy fats in our daily diet. Find out which fats are good to incorporate and why they are so good for you.
‘Doc, what can I drink when I’m fasting?’
This is one of the most frequently asked questions around intermittent fasting. And, it is very useful to understand which fluids are good and which are not-so-great to have when you are fasting in order to reap the most metabolic benefit from fasting.
In this session I will go into detail about how to stay hydrated during your fasting window. I will break down which fluids will break your fast and which fluids will affect autophagy. In general, if a fluid contains calories it will technically break your fast and will stop autophagy. But, some high-calorie fluids like MCT oil, coconut oil or cream... you can maintain ketosis and often these fluids can help you prolonged your fast.
Understand hydration and fluids so you can achieve your fasting goals with greater success.
Download a handy Cheat-Sheet which shows the effects of common fluids on fasting, ketosis and autophagy.
Did you know that alcohol is a FOOD GROUP? Like fat or carbohydrates?
For many people, alcohol contributes ENORMOUSLY to their total calorie intake as well as weight problems.
There are a few reasons for this...
Alcohol is metabolized as a toxin:
Alcohol is very rapidly absorbed from the lining of the stomach and from the small intestine. This means that alcohol hits the bloodstream soon after you swallow! And... your body isn't that keen on a big dose of alcohol, which can accumulate quickly to toxic levels. Your body cannot store alcohol, instead it breaks it down preferentially for use by your body cells for energy.
What this means: Any food you eat while drinking alcohol will go straight to storage while your body is busy eliminating the alcohol.
Alcohol is very high in calories:
Alcohol is very ENERGY-DENSE... alcohol contains almost as many calories per gram as fat does... but you can gulp down big volumes of alcohol without feeling full. So, if you drink regularly, alcohol probably contributes a lot towards your total calorie intake.
Alcohol is bad for self-control:
Alcohol is a well-known social lubricant... conversation seems to flow better, people are generally more laid-back after a couple of shots... Decision-making abilities and behaviors change when under the influence of alcohol. You will be much more inclined to have a burger with extra chips and a chocolate sundae if you've had a beer or two. Discipline and inhibitions fly out the window... and calories fly onto the plate!
In this session, you'll discover that alcohol can have a significant impact on your success with intermittent fasting, depending on your health and weight goals. It is essential that you understand alcohol metabolism and, if you drink... incorporate alcohol in a strategic and sensible way.
When it comes to nutrition and weight management, I’ve learned that your environment plays such an important role in whether you achieve success or not. If there is junk food in all your cupboards, that’s what you will. If you have a toaster visible on your kitchen counter… you will put a bagel in it and relish that bagel with jam and butter.
However, if you only have healthy whole foods in your home and visible in your kitchen, you reduce the likelihood that you will eat foods other than those immediately available to you.
So, shopping for food is possibly the most important strategy you can adapt to alter your home food environment for the better, which will then inevitably change your nutritional habits for the better.
In this session, I will encourage you to become curious and sceptical about the foods you buy. You will discover that food manufacturers are sneaky and stealthy and downright dishonest in their marketing so they can sell more products and get people hooked on unhealthy and addictive foods. You can outsmart food marketers by understanding food labels and learning how to shop for food in a conscious and strategic way.
If you buy healthy food, you will eat healthy food. If you eat healthy food, you will enjoy better health and vitality now and into the future. I'll offer you some handy tips to shop in a more efficient, strategic and mindful way so that eating healthy is easy because you are surrounded by good, nutritious food :)
One of the MOST IMPORTANT skills to have (and to teach your children) is how to read a food label and determine whether a food product is good for you, not-so-good for you, or potentially toxic.
In this session, I will guide you step-by-step so that you have a structured approach to reading any food label. Become a detective and outsmart the stealthy food marketers who label a product 'no added sugar', but meanwhile it contains more sugar than a jam donut!
Learn how to look at a food product with a critical and analytical eye so you can determine the TRUE nutritional value of the food, and make an informed decision before buying.
Now that you have an approach to reading food labels in a strategic and analytical way, let's do a few practice examples. You will see how food packaging can be VERY misleading. So, don't always believe the pretty picture or promises of 'healthy' / 'super-food' / 'heart-healthy' / 'high-fibre' / 'low-sugar'.
Read the label and decide for yourself whether the food product is good or bad for you and your family.
In this session, you will have some homework to do:
Read the labels of 5 food products you buy regularly. Do share any surprises or interesting discoveries with me and your fellow students :)
Also, have 3 'Healthy Plate' meals this week. Take photos and share!
Fasting has some dramatic and wonderful effects on your metabolism. Whether your goal is weight loss, improved mental agility, metabolic health, cancer prevention or another health benefit, it is crucial that you understand what happens in your body while you fast.
In this video, you will see exactly what happens to your metabolic hormones when you fast. You will understand how long it takes to achieve ketosis and why insulin is the game-changer to switch to fat-burning.
Find out the 5 mechanisms by which Intermittent Fasting can benefit your health and discover the hour-by-hour benefits of fasting. Understand that it takes most people more than 12 hours of fasting to achieve ketosis, and usually more than 18 hours of fasting to trigger autophagy.
Learn about how your brain can adapt to using ketones for fuel instead of glucose but accept that his takes a few weeks during which time you might experience some side-effects like headaches and brain fog. But, when your brain has become fat-adapted… your concentration, focus and mental agility improves dramatically.
Adapting to fasting takes time but if you gradually get used to longer-and-longer fasts, you can achieve the benefits without the side-effects.
Ketosis happens when your body is using FAT for energy instead of SUGAR. As you know, fat contains more energy than carbohydrate which means that you can feel more energetic and vital when your body has switched to burning fat as its primary fuel source.
Intermittent Fasting is one way of achieving ketosis. You will learn how to maximise this benefit and how to avoid the ‘Keto-Flu’. You will also discover that you can check at home if you are in fat-burning mode with a simple and inexpensive test.
In some clinics around the world, Fasting is used in conjunction with traditional treatments like chemotherapy and radiation to treat cancers. The reason why Fasting can improve the outcome of cancer treatment is that Fasting triggers AUTOPHAGY.
The word autophagy literally means ‘self-eating’. It is a mechanism by which your body will engulf old, damaged or dysfunctional cells, break them down into raw components which can then be recycled to repair tissues, make new cells or used in other body processes. Certain specialised cells of your immune system that detect and neutralise cancer cells are activated when you achieve autophagy.
Fasting for longer than 18 hours will typically induce autophagy because there is no fuel (energy, raw materials) coming into your system. At this point, your body will turn to internal resources to meet its needs. And, it will preferentially sacrifice cells and tissues that are damaged. This is how fasting can have a regenerative and anti-ageing effect.
Autophagy increases exponentially with prolonged fasts (longer than 36 hours) and reaches a peak at around 72 hours. These hardcore fasts are not for the faint-hearted but can have some incredible benefits because of autophagy.
Now that you have a deeper understanding of nutrition and the physiology of Intermittent Fasting (THE THEORY), we can move on the PRACTICAL APPLICATION.
You are ready to start applying your knowledge and begin fasting. If you are completely new to fasting, my advice would be to take things slow and steady. Don’t be in a rush to achieve a long fast. In the same way that it would be ill-advised for a couch potato who has never stepped foot in the gym to suddenly do a 3-hour hardcore training session, someone who has never fasted before should not aim to do a 3-day fast without proper preparation and some practice.
Adapting to fasting takes time. If you gently increase your fasting window over a number of weeks… your body will adapt more easily, you will experience fewer side-effects and you will experience more benefits in the long-run. It will also be easier to incorporate fasting into your life as a lifestyle change.
Remember that Intermittent Fasting is a lifestyle tool you can incorporate into your life long-term to harness benefits related to weight management, optimal energy metabolism and autophagy.
Check the resources section for an outline to use as a guide to slowly increase your fasting window over 6-8 weeks. You will also find a weekly and monthly planner - if you like to be organized and plan your fasting strategy in advance.
If you are already fasting, then this section will highlight some ways you can adapt your current fasting schedule for optimal benefits.
Learn that timing your fast according to your circadian nature may impact your fasting success. If you function best early in the day (early bird), then eating earlier in the day may be best for you. Whereas, if your energy and alertness are highest in the evening or at night (night owl), you could benefit more from skipping breakfast and eating during the later hours of the day.
You can find out whether you are more of a night owl or early bird by using this quick and easy online questionnaire: https://lifestyledoc.co.za/early-bird-or-night-owl/
Whether you want to lose weight, reduce inflammation, reverse fatty liver disease, prevent cancer or gain better control over your blood glucose... you need to break your fast well.
One of the most common mistakes people make when practicing intermittent fasting is to break their fast with the wrong foods.
You cannot eat anything you like and then compensate by going for long periods of time without eating, and expect to achieve your health and weight goals.
Instead, you need to plan your 'Break-Fast' meal with your optimal body composition in mind. Think of what you are made of and nourish your body with the foods that will serve it best.
Remember your 'Healthy Plate' when structuring your 'break-fast': Plenty of vegetables (at least 50% of your plate) + Protein (25-30% of your plate) + Healthy fats (10-15%) + Smart carbs (maximum 15%). Try to make your 'break-fast' meal low-carb to maintain ketosis for longer. And, don't forget to hydrate well!
Many people are unsure of how foods and fluids will affect their fasting efforts. Common questions include:
Can I have my coffee in the morning? Can I put milk in my tea? What will happen if I take a little honey and lemon juice in hot water? What about chia seeds soaked in water? Can I sweeten my tea with Stevia?
In this session I explain that any food or drink that contains calories will (strictly speaking) break your fast. Water (still or sparkling but without sweetener), black coffee and tea (without milk or sugar), and herbal infusions are all calorie-free and sugar-free. They will not impact on your fast and will not stop ketosis or autophagy.
Any food or fluid containing carbohydrate (like cow's milk, oat milk, honey or broth made with starchy vegetables) with halt ketosis, autophagy and will break your fast.
You can maintain ketosis (but not autophagy) by consuming high-fat carb-free foods / fluids like MCT oil, cream, butter, ghee or coconut oil. For many people, these 'fat-bombs' are great to promote fat-burning and can help sustain energy and reduce hunger during long periods without food intake... but they do contain calories and will therefore break your fast.
Check the resources section and download a handy cheat sheet showing the effect of certain fluids / foods on your fast.
One of the most satisfying and motivating experiences is when you achieve a goal or milestone. For many of us, seeing the numbers on the scale go down over time is exhilarating and brings happiness.
In this video we’ll discuss the various ways you can monitor your progress as you incorporate intermittent fasting into your life.
You will discover that the scale is one of the least important measures when it comes to assessing success because your weight fluctuates and doesn’t reflect changes in body composition. There’s an easier and better measurement that reflects inflammatory fat loss which is far more important to track.
I encourage you to watch this video in the spirit of goal-setting. Think about what you would like to achieve for yourself and reflect on ways you plan to monitor your progress over time.
While measuring yourself is useful and extremely motivating, you probably will want to see objective improvements in your metabolic health markers.
Most of us embark on a fasting journey to improve health and optimise well-being so we can prevent health complications in the future. It's always gratifying to see how your metabolic profile improves as you apply the principles of fasting over time.
In this session, you'll learn about various laboratory tests that are available and useful to track your results over time. Glucose, insulin, inflammatory markers, ketones... we'll discuss these in some detail so you can understand which tests are available at the beginning of your fasting journey and periodically while you implement healthy lifestyle changes.
If you have any concerns or questions about interpreting or understanding your results, you are welcome to reach out to me.
Hunger is a natural and inevitable effect of fasting. When you first start fasting, I guarantee you that you will feel hungry. But, remember, hunger is not a sign of anything dangerous happening in your body. It is a physiological adaptation to encourage you to eat when food is available because our ancestors had to survive days on end without access to food.
Most of us can easily survive for longer than 2 weeks without any food intake at all as long we get enough vitamins, minerals and hydration because we have plenty of energy stored in fat and protein.
So, don’t be scared to feel hungry.
In this session, you will learn the physiology of appetite. Hunger is controlled by multiple hormones and messages from various organs but it is temporary. If you can distract yourself for 20 minutes, typically the hunger signals in your body will subside and the hunger will go away.
You've learnt that hunger is not dangerous and is not a signal of anything sinister happening in your body. Nevertheless, hunger and cravings are quite unpleasant and can be de-railing when you are implementing intermittent fasting and healthy lifestyle changes.
In this session, we'll discuss practical strategies you can apply to reduce hunger and manage cravings. You'll discover that cheating is not a problem as long as it helps you achieve your ultimate goals. And, you'll learn about the best ways to cheat so you don't undo or jeopardize the benefits of fasting.
You can download a list of 'high-satiety foods': These are foods that have a natural appetite-suppressant effect. It is a great strategy to include more of these foods in your meals to keep your appetite under control.
Most of us are used to eating at least breakfast, lunch and dinner, and maybe a few snacks in-between. It is quite an adjustment to start fasting if you are not used to it. Your body can go into shock if you suddenly stop eating for days on end.
In this session we will talk about the common side-effects of fasting, like headaches, constipation, dehydration, fatigue and hunger. You will learn some strategies to minimise or reduce these side-effects.
You may be surprised that hypoglycaemia is NOT a common side-effect of fasting, but it is important to know the signs and symptoms because hypoglycaemia is an important reason to break your fast.
Remember, that side-effects are usually temporary. They will decrease and disappear with time, as your body adapts to using fat for energy. They are NOT a sign of anything dangerous or sinister happening in your body.
If you experience any worrying effects while starting out on your fasting journey. Please contact me and I can guide you on what to do.
You can download a table showing strategies you can use to minimise the common side-effects of fasting
You know that Intermittent Fasting has some fantastic benefits for your health and well-being. And, you know that being physically active is great for your body and your mind. In this session, you'll discover that you CAN and SHOULD exercise while practicing intermittent fasting to maximize the benefits of both.
You'll learn that exercise helps to suppress your appetite, maintain muscle mass, improve metabolic flexibility and fat-burning, boost growth hormone release (with added anti-ageing effects), and support bone health.
By exercising in a fasted state, you can super-charge both ketosis and autophagy. And, you'll be amazed at how much more energy you have during your training sessions once you have become adapted to using fat for fuel.
Different forms of physical activity have different metabolic effects. Cardiorespiratory training gets your heart pumping, your blood flowing and conditions your lungs. Flexibility and balance training helps maintain optimal body alignment during natural movement. While strength training improves the power, bulk and metabolism of your muscles.
You need a balance of all these types of exercise, but during this session you will learn about the specific beneficial effects of each. You will also understand why we place emphasis on strength / resistance training for maximum metabolic and body-composition benefits.
Whether you are a gym-bunny, long-distance marathon runner, body-builder or champion channel surfer (couch potato)... if you understand how to combine intermittent fasting with physical activity for maximal effect, you will achieve your goals with greater success.
In this session, I offer some general tips on how to get the most out of exercising while practicing intermittent fasting.
As always, if you have any questions or concerns, please reach out to me.
You know what it feels like when you have not slept well: Tiredness, irritability, slowed thinking, body aches and general misery.
Sleep is ESSENTIAL to homeostasis and maintaining an optimal balance of hormones. Sleep deprivation is a significant stress on your body and causes release of neurotransmitters associated with acute and chronic stress. Over the long-term, poor sleep results in release of cortisol, insulin and inflammatory chemical messengers which upsets your immune system and nutrient metabolism. This is why people who have chronically disrupted sleep are at increased risk of some nasty health conditions like type 2 diabetes, heart disease and cancer.
When you are incorporating intermittent fasting into your life, it is so important to enjoy good sleep so that you can enjoy optimal benefits from fasting. If your sleep is poor… it really doesn’t matter whether your diet is perfect, your exercise routine is on point and your fasting strategy is optimised… you will struggle to achieve weight loss, fantastic energy and mental clarity.
In this session, I’ll share evidence-based strategies you can use to improve your sleep duration and quality. You will discover that not everyone needs 8 hours of sleep and that your sleep requirements change throughout your lifespan.
Remember that sleep disruption is a fairly common side-effect of fasting when you first start out, but it will get better with time and observing good sleep hygiene is usually all you need to overcome this temporary phenomenon.
Monitoring your sleep duration, quality and energy levels can be very helpful to understand whether you need to improve your sleep patterns for better overall vitality. You can download a sleep journal template to help you track your sleep so you can make improvements to your routine or lifestyle to optimize your fasting success.
Master Hunger, Master Yourself
One of my patients recently said something powerful:
“Dr Karen, if I can get control of this hunger, I feel like I’ll be able to control anything in my life.”
And she’s right.
Intermittent fasting isn’t just a tool for weight loss — it’s training for your mind.
When you fast, you’re not only burning fat…
You’re practicing:
✨ Patience
✨ Self-control
✨ Resilience
✨ Discipline
Every time you resist the urge to give in to a craving, you’re proving to yourself that you’re stronger than your impulses.
This is called voluntary discomfort — choosing small, manageable challenges to grow tougher and more focused.
Just like lifting weights strengthens your muscles, fasting strengthens your mind and willpower.
It’s also a form of hormesis — stress that makes you stronger.
Fasting challenges your body and brain so they adapt, becoming more efficient, resilient, and calm under pressure.
Mental benefits:
Greater focus & productivity
Less emotional reactivity
Stronger self-discipline
More confidence and control
Physical benefits:
Better insulin sensitivity
Reduced inflammation
Enhanced fat metabolism
Cellular renewal (autophagy)
Next time you feel hunger, pause and reflect:
? What am I really feeling?
? Can I wait a little longer?
? What else in my life could improve if I built this same discipline?
Every fast is a micro-win.
Every moment you say “not now” is a step toward self-mastery.
You’re not just skipping a meal.
You’re training to conquer challenges — in your health, your work, your relationships, your life.
When you master hunger, you master yourself.
Intermittent fasting is a powerful way to improve your health and vitality, but you really must do it right to get the benefits.
If you understand how fasting works at a metabolic level, and you apply the principles of intermittent fasting you can:
· Reduce inflammation
· Gain control of your appetite and your weight
· Manage health conditions like diabetes and IBS
· Improve your energy levels
· Optimize gut health
· Enjoy mental clarity and banish brain fog
· Activate anti-cancer and anti-ageing pathways
In this course, I explain why simply skipping breakfast every day is NOT intermittent fasting, that you can’t unfortunately just skip meals and eat whatever you want the rest of the time if you want to reap the health benefits of fasting.
If you have never tried fasting before, you will learn how to gradually increase your fasting window to achieve a 24-hour fast within 6-8 weeks without experiencing negative effects. And, if you are already quite comfortable with fasting, you will discover how to maximize the benefits through mindful structuring of your pre-and post-fast meals, optimal nutrition, exercise while fasting, sleep science, positive psychology and other lifestyle factors that can help you achieve your health goals.
You will have access to on-demand video sessions, downloadable supporting resources and recipe ideas. Homework tasks are there to help you practically apply what you’ve learnt. You can interact with me and fellow students via an online community where we can learn together and benefit from shared experiences.
I look forward to guiding you on your intermittent fasting journey towards a healthier and happier you!