Les différents types de jeûne intermittent

The different types of intermittent fasting

Apr 24, 2024

Intermittent fasting has become a popular practice in the health and wellness field, attracting the attention of many researchers, health professionals, and healthy lifestyle enthusiasts. This alternative eating approach, which involves alternating between periods of fasting and eating windows, offers remarkable flexibility while promising a range of health benefits. But then what are the different types of intermittent fasting? Discover the characteristics of each method in this article!

What you need to know about intermittent fasting

What is intermittent fasting?

Intermittent fasting involves limiting the period of time you consume food , often by alternating between fasting periods and set eating windows. There are several methods of intermittent fasting, the most common of which are: 16/8 fasting, alternate day fasting (5:2), 24-hour fasting, 36-hour fasting, extended fasting, and spontaneous fasting.

How it works ?

The main idea behind intermittent fasting is to allow your body to spend more time in a fasted state , which can lead to several beneficial effects. During fasting, your body gradually switches from digesting food to using fat stores for energy , leading to weight loss. Additionally, intermittent fasting can improve insulin sensitivity, regulate blood sugar levels, reduce inflammation, and promote cardiometabolic health.

The different intermittent fasting methods offer flexibility in terms of fasting duration and frequency, allowing individuals to choose an approach that best fits their lifestyle and health goals.


  • Weight loss : Intermittent fasting can help reduce total calorie intake and boost weight loss by burning fat stores.
  • Improved Metabolic Health : It may improve insulin sensitivity, reduce blood sugar levels, and promote heart health.
  • Easy to follow : Intermittent fasting offers flexibility and may be easier to fit into a busy lifestyle than some traditional diets.

Potential disadvantages

  • Initial difficulty : Some people may find it difficult to get used to fasting periods, especially at first.
  • Risks for certain populations : Intermittent fasting may not be suitable for everyone, such as pregnant women and people with eating disorders or underlying health conditions. It is important to consult a healthcare professional before beginning any intermittent fasting program.

The different types of intermittent fasting

Classic intermittent fasting (16/8)

Classic intermittent fasting , also known as the 16/8 method, involves fasting for 16 consecutive hours each day , followed by an 8-hour window where meals can be consumed. For example, a person may choose to fast from 8:00 p.m. to 12:00 p.m. the next day, then eat their meals between 12:00 p.m. and 8:00 p.m. This type of fast is generally easy for many people to follow because it matches natural sleeping and eating patterns. Potential benefits include weight loss, improved insulin sensitivity, and reduced appetite . However, some may find fasting for 16 hours difficult , especially at first, and it may be difficult to adjust to social schedules that involve eating outside of the 8-hour window.

Alternate fasting (5:2)

Alternate day fasting , also known as the 5:2 method, involves eating normally for five days of the week and drastically reducing calorie intake to around 500 to 600 calories for two non-consecutive days . For example, a person may eat as usual from Monday to Friday, then reduce their calorie intake on Saturdays and Sundays. This type of fast may be easier to follow for some than daily fasting, and it can lead to significant weight loss as well as improvements in metabolic health . However, restricted fasting days can be difficult due to hunger and fatigue , and it may be difficult to maintain a regular diet on non-fasting days.

24 hour fast

24-hour fasting involves fasting for a full 24-hour period , usually from dinner to dinner or breakfast to breakfast. For example, a person may choose to eat their last meal at 6:00 p.m. one day and then fast until 6:00 p.m. the next day. This type of fasting is relatively simple to follow and may offer similar benefits to traditional intermittent fasting, such as weight loss and improved metabolic health . However, some may find it difficult to fast for an entire day (particularly due to hunger and fatigue), and it may be difficult to accommodate social schedules during the fast.

36 hour fast

The 36-hour fast is similar to the 24-hour fast, but it is extended to 36 hours . For example, a person may choose to fast from dinner one day until breakfast two days later. This type of fasting may offer benefits akin to 24-hour fasting, as well as an extended period of ketosis , which may have positive health effects . However, the extended duration of the fast can make the experience more difficult : no one is used to not eating for this duration, so there may be a feeling of increased fatigue in addition to hunger.

Fast 5 days per month (or extended fast)

Prolonged fasting involves fasting for five consecutive days each month , consuming only water and possibly non-caloric beverages. This type of fasting may offer benefits similar to other forms of intermittent fasting, as well as potential health benefits . However, prolonged fasting can be difficult to follow due to extreme hunger and fatigue, and it can be difficult to maintain motivation over such a long period of time.

Spontaneous fasting

Spontaneous fasting has no fixed structure and people fast at their convenience, skipping meals or fasting for short periods when it suits them. Although it offers some flexibility and may be easier to fit into a busy lifestyle , it may be less structured and less effective for some compared to other forms of intermittent fasting. The advantages and disadvantages may vary depending on how it is practiced and the individual discipline.


In conclusion, studying the different types of intermittent fasting reveals a fascinating range of approaches, each offering its unique set of benefits and considerations. Whether 16/8 fasting, alternate day fasting (5:2), 24 hour fasting, 36 hour fasting, extended fasting or spontaneous fasting, each method presents various possibilities for weight management, improving metabolic health and promoting general well-being.

You are now ready to start, after consulting a health professional of course!

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