HomeChampion's TrainingFitness Secrets & TipsIntermittent Fasting: The Transformative Journey From Fasting to Fitness
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Intermittent Fasting: The Transformative Journey From Fasting to Fitness

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In recent years, intermittent fasting (IF) has emerged as a popular eating pattern with potential health benefits. It involves cycling between periods of eating and fasting, with the focus on when to eat rather than what to eat. By cycling between periods of eating and fasting, IF can have a profound impact on the body’s metabolism, energy utilization, and even workout performance. In this blog, we’ll explore the science behind intermittent fasting, its methods, its effects on fitness, and important considerations for incorporating it into your fitness routine.

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What is Intermittent Fasting?

Intermittent fasting is an eating pattern that has been practiced throughout human history, driven by periods of food scarcity. Instead of restricting specific food groups, Intermittent fasting cycles between fasting and eating windows. During the fasting period, individuals consume only water, herbal teas, and non-caloric beverages, allowing the body to enter a state of metabolic flexibility and fat burning. Intermittent fasting has gained popularity in recent years as a dietary approach that not only aids in weight management but also boasts potential benefits for overall health and fitness.

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There are various methods of intermittent fasting, with the most common being the 16/8 method, where individuals fast for 16 hours and have an 8-hour eating window. Another approach is the Eat-Stop-Eat method, which involves fasting for 24 hours once or twice a week. Additionally, the 5:2 diet requires consuming a reduced calorie intake (500-600 calories) on two non-consecutive days each week.

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Intermittent fasting has gained popularity due to its potential health benefits, including weight loss, improved insulin sensitivity, cellular repair, cardiovascular health, and enhanced brain function. However, it may not be suitable for everyone, and consultation with a healthcare professional is recommended before adopting this eating pattern.

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Methods of Intermittent Fasting

Fasting Period
Eating Period
16/8 Method 16 hours 8 hours Fast from 8:00 PM to 12:00 PM, eat from 12:00 PM to 8:00 PM
Eat-Stop-Eat 24 hours (1-2 times/week) Regular eating days Fast from 7:00 PM to 7:00 PM next day, eat normally on other days
5:2 Diet 2 non-consecutive days/week Regular eating days Eat normally for 5 days, consume 500-600 calories on fasting days
Alternate-Day Fasting Every other day Regular eating days Fast or consume very few calories on fasting days, eat normally on non-fasting days
Warrior Diet 20 hours 4-hour eating window Fast for 20 hours, eat a large meal during a 4-hour window in the evening
OMAD Diet 23 hours 1-hour eating window Fast for 23 hours, eat one large meal in a 1-hour window each day


Intermittent fasting (IF) offers several methods, each with its unique fasting and eating patterns. The various approaches allow individuals to choose the one that best fits their lifestyle and preferences. Below are several well-known intermittent fasting methods:

16/8 Method

Also known as the Leangains protocol, this method involves fasting for 16 hours and limiting eating to an 8-hour window. For example, one might fast from 8:00 PM until 12:00 PM the next day and eat all their meals between 12:00 PM and 8:00 PM. Following this approach is relatively easy, typically involving the omission of breakfast and consuming the first meal around noon.


With this method, individuals fast for a full 24 hours once or twice a week. For instance, one might finish dinner at 7:00 PM and fast until 7:00 PM the following day. During the fasting period, only non-caloric beverages like water, tea, or black coffee are allowed. This method can be challenging for some people due to the longer duration of fasting.

5:2 Diet

In the 5:2 diet, individuals consume their regular diet for five days a week but restrict calorie intake to 500-600 calories on two non-consecutive days. These fasting days should not be consecutive to avoid prolonged periods of low-calorie intake. On the remaining five days, individuals eat normally without any caloric restrictions.

Alternate-Day Fasting

This approach includes a pattern of alternating between days of fasting and days of regular eating. On fasting days, individuals either consume very few calories (around 500) or nothing at all, while on non-fasting days, they eat normally. This approach can be challenging for some due to the frequent switching between fasting and eating.

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Warrior Diet

The Warrior Diet involves fasting for 20 hours and eating a large meal during a 4-hour eating window in the evening. During the 20-hour fasting period, small amounts of raw fruits and vegetables or protein-rich snacks are allowed. The evening meal is usually the main and most substantial meal of the day.

The OMAD Diet

OMAD stands for “One Meal A Day.” As the name suggests, individuals eat only one large meal within a 1-hour eating window each day, and the rest of the day is spent fasting. This approach requires careful meal planning to ensure all necessary nutrients are consumed in a single meal.

It’s essential to choose an intermittent fasting method that aligns with individual preferences, daily routines, and health goals. While some people may find certain methods more sustainable and easier to follow, others may prefer different approaches. As with any dietary change, it’s crucial to consult a healthcare professional before starting intermittent fasting, especially for those with underlying health conditions or specific dietary requirements.

Working of Intermittent Fasting

How Does Intermittent Fasting Work? | KreedOn
Source: Precision Nutrition


Intermittent fasting works by alternating between periods of eating and fasting, which can vary in duration depending on the chosen method. During the fasting periods, the body depletes its glycogen stores, which are the stored form of glucose, and starts to rely on fat stores for energy. This metabolic switch is the key mechanism behind intermittent fasting.

When we eat, our bodies break down the food into glucose, which is then used for energy or stored as glycogen in the liver and muscles. Between meals, when there is no new intake of food, the body taps into its glycogen reserves to maintain energy levels. Once these glycogen stores are depleted, which typically happens after several hours of fasting, the body switches to burning fat for fuel.

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By extending the fasting period, intermittent fasting allows the body to access and utilize stored fat more efficiently. This can lead to increased fat burning and potentially support weight loss. Additionally, intermittent fasting may have other health benefits, such as improved insulin sensitivity, reduced inflammation, and enhanced cellular repair processes.

It should be emphasized that intermittent fasting may not be appropriate for everyone, and individual responses can differ. Before starting any fasting regimen, it’s essential to consider one’s health status, lifestyle, and consult with a healthcare professional to ensure it is safe and appropriate for them.

Benefits of Intermittent Fasting

Benefits of Intermittent Fasting | KreedOn
Source: The Diet Etiquette

Enhanced Fat Burning & Weight Management

One of the primary reasons why intermittent fasting is favored by fitness enthusiasts is its ability to promote fat burning and facilitate weight management. During fasting periods, insulin levels decrease, leading the body to tap into stored fat for energy. Moreover, IF can help regulate appetite hormones, potentially reducing overall calorie intake and contributing to weight loss goals when combined with a balanced diet and regular exercise.

Preserving Lean Muscle Mass

A common concern with any weight loss strategy is the potential loss of lean muscle mass. However, studies have shown that intermittent fasting may help preserve muscle mass due to the release of growth hormone and the body’s adaptive response to fasting. When combined with resistance training, IF can support muscle maintenance and even contribute to muscle gain for some individuals.

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Boosting Exercise Performance

Contrary to concerns about reduced energy during fasting periods, intermittent fasting may actually enhance exercise performance for some individuals. Research suggests that fasting can increase adrenaline and noradrenaline levels, leading to heightened alertness and energy during workouts. Many people find that working out in a fasted state can improve focus and endurance, while others may prefer eating strategically before their workouts for optimal performance.

Improved Insulin Sensitivity

IF can enhance insulin sensitivity, reducing blood sugar levels and the risk of type 2 diabetes. Lower insulin levels during fasting make stored body fat more accessible for energy.

Cellular Repair and Longevity

Fasting triggers cellular repair processes, such as autophagy, where cells remove damaged components. This may contribute to improved cellular health and increased lifespan.

Cardiovascular Health

Intermittent fasting may lower risk factors for heart disease, such as LDL cholesterol, blood triglycerides, and inflammation, promoting heart health.

Enhanced Brain Function

Fasting stimulates the production of brain-derived neurotrophic factor (BDNF), promoting the growth of new nerve cells and potentially protecting against neurodegenerative diseases like Alzheimer’s.

Cancer Prevention

Animal studies suggest that intermittent fasting may help prevent certain cancers, inhibiting tumor growth and enhancing the body’s defense mechanisms against cancer cells.

Gut Health

Intermittent fasting can positively impact gut health by promoting beneficial changes in the gut microbiome and reducing inflammation, potentially alleviating gastrointestinal symptoms.

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Important Considerations

While intermittent fasting can offer numerous benefits for fitness and health, it may not be suitable for everyone. Individuals with certain medical conditions, pregnant or breastfeeding women, and those with a history of eating disorders should approach IF with caution and consult with a healthcare professional before starting. Additionally, athletes engaged in high-intensity training or trying to build significant muscle mass may need to tailor their fasting schedule to ensure they meet their nutritional needs.

Getting Started with Intermittent Fasting

What is Intermittent Fasting? Unlock the Power of Fasting for Fitness - KreedOn
Image Source: Muscle & Fitness

When starting intermittent fasting, individuals should ease into the chosen method and find what works best for them. It is essential to listen to the body’s cues and not push beyond one’s limits. Prioritizing nutrient-dense foods during the eating window is crucial to ensure adequate nourishment.


Intermittent fasting is a flexible and potentially powerful tool for improving overall health and well-being. From weight loss to improved brain function, the potential benefits of IF are promising. However, it is essential to approach intermittent fasting responsibly and consult a healthcare professional before incorporating it into one’s lifestyle, especially if specific health concerns are present.

The best diet is one that individuals can adhere to in the long run and that suits their individual needs and preferences. Experimenting with different methods of intermittent fasting and finding what works best for each person can lead to a healthier and happier life. It is crucial to remember that intermittent fasting is not a one-size-fits-all solution and that each individual’s journey may be unique.

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What is intermittent fasting?

Intermittent fasting is an eating pattern that alternates between periods of eating and fasting, promoting various health and fitness benefits.

How does intermittent fasting impact fitness?

Intermittent fasting can aid in weight management, promote fat burning, preserve lean muscle mass, improve insulin sensitivity, and boost exercise performance.

Is intermittent fasting suitable for everyone?

Intermittent fasting may not be suitable for everyone, and its effects can vary based on individual responses, medical conditions, and fitness goals.

Can intermittent fasting help with weight loss?

Yes, intermittent fasting can contribute to weight loss by promoting fat burning and reducing overall calorie intake when combined with a balanced diet.

Should athletes consider intermittent fasting?

Athletes should carefully consider their training intensity and nutritional needs before adopting intermittent fasting, as it may require adjustments to their fasting schedule.

Is it safe to exercise during fasting periods?

Exercising during fasting periods can be safe and even enhance energy and performance for some individuals, but individual preferences and responses may vary.

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