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Immunity, Lifestyle, Longevity
Medically reviewed by Dr. Essie Woods Bruell, M.D. - Written by Sydney E. on August 27, 2024
August 27, 2024
Sydney E.
Thinking of trying the cyclical keto diet? It’s all about cycling low-carb and high-carb days to boost energy and metabolic flexibility. This article will break it down for you.
Quick Facts
What is the Cyclical Keto Diet?
The cyclical keto diet (CKD) is all about low-carb and high-carb days. You’ll follow a low-carb diet for 5-6 days, focus on healthy fats and proteins, and then switch to 1-2 days of higher-carb consumption.
This pattern will replenish glycogen stores and increase metabolic flexibility, allowing your body to switch between burning fats for energy on keto days and carbs for energy during the keto cycle days.
This cyclical approach gives you a break from the strict carb restrictions of the standard ketogenic diet and a balanced way to stay in ketosis while controlling your carb intake through carb cycling on a low-carb diet.
Let’s compare CKD to the standard keto diet.
Cyclical Keto vs Standard Keto
The standard ketogenic diet is very low-carbohydrate. Carbs are normally restricted to 50 grams per day.
The body burns fat for energy instead of glucose when carb intake is drastically reduced.
This is known as ketosis.
When your body is in ketosis, it burns ketones for energy. The liver produces ketones when it breaks down fat.
While the standard keto diet consistently restricts carbs to stay in ketosis, the cyclical keto diet introduces flexibility by alternating macronutrient ratios.
On a CKD, five to six days are spent following the standard ketogenic diet, and then 1-2 days of higher carb consumption.
These higher-carb days are called “refeeding days,” meant to replenish your body’s depleted glucose reserves.
CKD cycles allow for more carbs, which can be great for those who want to increase strength and muscle growth.
Another difference is the types of food.
A cyclical ketogenic diet includes complex carbs and fiber-rich foods during refeeding days.
This structure avoids high protein intake and instead focuses on moderate protein to approach ketosis, though, on refeeding days, your body does switch out of ketosis.
Benefits of Cyclical Keto
The cyclical keto diet has many benefits that make it appealing to many.
For athletes and fitness enthusiasts, following a CKD can boost performance by providing energy through strategic carb intake.
When following a strict keto diet, insulin levels are suppressed. Insulin regulates muscle growth.
Refeeding with complex carbohydrates will increase insulin levels, support muscle growth, and improve performance, making achieving fitness goals more accessible.
Some people experience the unpleasant side effects of the keto flu when adjusting to the ketogenic diet.
Some keto-flu symptoms are fatigue, headache, brain fog, nausea, vomiting, irritability, etc.
These symptoms appear as the body adjusts to burning ketones instead of carbohydrates for fuel.
Following the cyclical keto diet can also add more fiber to your diet, which can help with any constipation issues the body may have when restricting carbs.
The cyclical keto diet's flexibility can make it easier to comply with the strict ketogenic diet.
Having periodic high-carb days makes the cyclical ketogenic diet more manageable and provides more energy and overall satisfaction.
How to do the Cyclical Keto Diet
The cyclical keto diet consists of low-carb (5-6 days) and high-carb days.
During low-carb days, consume 20-50g of carbs, focusing on healthy fats and high-quality protein.
On the one or two days of high carbohydrate consumption, when replenishing depleted glycogen stores, remember - not all carbs are created equal.
Focus on carb quality.
Instead of eating white bread and processed foods, consume nutrient-dense, complex carbohydrates such as sweet potato, brown rice, and oats loaded with vitamins and fiber.
After the refeeding days, following an intermittent fasting schedule may be helpful to get back into ketosis quickly.
This involves eating only within a certain window.
For example, the 16:8 plan involves eating only within an eight-hour window and having nothing more than water for the other sixteen hours.
Fasting for about 16 hours can help deplete glycogen stores and switch your body back to fat-burning mode.
Combining intermittent fasting with high-intensity training can fast-track this process.
Steady-state cardio or high-intensity training on an empty stomach can also help you return to ketosis.
During this transition, be aware of symptoms like fatigue and brain fog.
Fat Adaption
Before starting the cyclical keto diet, becoming fat-adapted is a must.
This means your body can burn fat for fuel and easily switch in and out of ketosis. The fat adaptation usually takes 30 days following a keto diet, focusing on high-fat, moderate-protein, low-carb meals.
Please note that experiences with fat adaptation can vary from person to person.
Some people breeze through it, while others experience fluctuations in energy and performance.
Once you are fat-adapted, your body will be better equipped to handle the cyclical nature of CKD.
Scheduling Your Carb Days
Scheduling the days you consume high-carb foods is critical in the cyclical keto diet.
After five to six days of reducing your carb intake, increase your carbohydrate intake on one or two designated days to replenish glycogen stores.
Schedule your carb days on both quantity and quality.
Consume carbohydrates from whole food sources to maximize benefits and overall health. Proper planning will ensure that high-carb days support your progress.
Foods to Eat on Low-Carb Days
On low-carb days, focus on protein sources, healthy fats, and low-carb veggies. Lean meats like chicken, turkey, fish, and eggs, and fatty fish like salmon provide protein and healthy fats.
To maintain energy and overall health, include healthy fats from avocados, nuts, and olive oil.
Low-carb veggies like broccoli, spinach, tomatoes, and cauliflower are good choices.
To maintain ketosis, limit starchy veggies such as beets and white potatoes.
Fruits should generally be limited, but apples, blueberries, strawberries, and melon are low in carbohydrates.
High-Carb Refeeding Days
On high-carb refeeding days, focus on complex carbohydrates from whole foods like sweet potatoes, beans, lentils, and whole grains.
These foods provide essential nutrients and fiber, especially with a higher carb intake.
On the first refeeding day, carbohydrates should account for 70% of your total caloric intake.
Focus on foods with a higher glycemic index.
On the second day, shift to 60% carbs with foods with lower glycemic index.
These will help replenish glycogen stores while maintaining nutritional balance.
Avoid refined sugars and processed foods on high-carb days to maintain the benefits of the cyclical keto diet.
These foods will spike your blood sugar and derail your progress.
Potential Drawbacks of Cyclical Keto
Although cyclical keto has many benefits, it also has some drawbacks.
Water retention, especially after high-carb days, can cause temporary weight gain and bloating.
Some may experience brain fog and tiredness during the adjustment phase.
When adjusting to the ketogenic diet, some people experience the unpleasant side effects of the “keto flu.”
Some keto-flu symptoms are fatigue, headache, brain fog, nausea, vomiting, irritability, etc.
These symptoms appear as the body adjusts to burning ketones instead of carbohydrates for fuel.
When adjusting to the ketogenic diet, some people experience the unpleasant side effects of the keto flu.
Some keto-flu symptoms are fatigue, headache, brain fog, nausea, vomiting, irritability, etc.
These symptoms appear as the body adjusts to burning ketones instead of carbohydrates for fuel.
These may recur as you initiate the keto cycling days. It requires discipline to endure these side effects on a short frequency, such as weekly.
Another challenge is craving unhealthy foods during the carb-loading phase.
Without proper planning, high-carb days can turn into unhealthy binges and derail the entire diet.
Initiating a keto diet is quite a challenge for the body and your mindset, and doing it repeatedly can decrease the effectiveness of your weight loss.
Dr. Bruell, an internal medicine specialist interested in weight loss management, points out the long-recognized syndrome of “yo-yo” dieting.
Going on and off of diet programs repeatedly can severely limit your ability to lose weight.
If high-carb days are not managed properly, inconsistent fat burning may occur, which will affect weight loss and metabolic efficiency.
Cyclical Keto Myths
Several myths about cyclical keto need to be debunked.
One major misconception is that ketosis and ketoacidosis are the same.
In reality, ketosis is a safe metabolic state, while ketoacidosis is a life-threatening condition in uncontrolled diabetes.
Another myth is that occasional cheating on keto is harmless. It can disrupt ketosis and delay your return to the fat-burning state.
Intermittent fasting can enhance results, but it is not necessary to maintain ketosis.
Conclusion
Following a cyclical keto diet is a flexible and balanced approach to ketogenic dieting.
By alternating between low-carb and high-carb days, you can enjoy the benefits of ketosis while replenishing glycogen stores and supporting muscle growth.
The flexibility, which can lead to better compliance and more energy, makes it a good option for many.
If you want to supercharge your keto experience, try cyclical keto.
It is important to note that there is little study evidence to confirm that cyclical keto is superior to traditional keto in both weight loss and strength and endurance training.
Dr. Bruell notes that a literature search confirms that keto and balanced nutrient diets produce weight loss, but keto and cyclical keto cause a decrease in lean body mass and muscle mass, which is not seen in balanced nutrient diets.
With proper planning and mindful eating, you can have the best of both worlds and achieve your health and fitness goals.
What is cyclical keto?
Cyclical keto balances low-carb and high-carb days to sustain ketosis and replenish glycogen stores. This way, you have flexibility while still supporting your metabolic goals.
How is cyclical keto different from regular keto?
Cyclical keto allows one or high-carb days a week, compared to the regular keto diet, which constantly restricts carbs. This can help replenish glycogen stores and may improve workout performance.
What are the benefits of cyclical keto?
It is hoped but not proven that cyclical keto has benefits like improved athletic performance, muscle growth, and more energy, making it easier to live a healthy lifestyle. If so, you can support your fitness goals and have fuel for your activities.
How to get back to ketosis after high-carb days?
To get back to ketosis after high-carb days, try intermittent fasting for 16 hours and high-intensity workouts. These will help you get back to ketosis faster.
What to avoid on high-carb refeeding days?
Avoid refined sugars and processed foods to benefit from high-carb refeeding days. Stay on track with your diet.
Medically reviewed by Dr. Essie Woods Bruell, M.D. - Written by Sydney E. on August 27, 2024
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