Intermittent fasting
Intermittent fasting refers to a diet in which phases of food intake and fasting alternate in a fixed rhythm. In contrast to classic diets, the focus is not on restricting certain foods, but on the time frame of eating. Popular methods include the 16:8 principle and 5:2 fasting.
What is intermittent fasting?
With intermittent fasting—also known as intermittent fasting—the day or week is divided into eating and fasting windows. During the fasting phase, no calories are consumed; water, tea, and black coffee are allowed. The basic principle is based on the idea of giving the body regular breaks from the digestive process.
The most well-known methods
- 16:8: 16 hours of fasting, 8-hour eating window—the most common form, often practiced by skipping breakfast.
- 5:2: Eat normally on five days, and on two non-consecutive days, reduce calorie intake to about 500–600 kcal.
- Eat Stop Eat: A full 24-hour fast once or twice a week.
Effects on Body and Mind
During the fasting phase, insulin levels drop, the body begins to use stored energy, and processes such as autophagy—the cellular self-cleansing process—are stimulated. Many people also report greater mental clarity and more stable energy levels during the fasting window. It is well-documented scientifically that intermittent fasting can regulate blood sugar levels and lower inflammation markers.
Important: Intermittent fasting is not suitable for everyone. Pregnant women, breastfeeding women, and people with eating disorders or certain medical conditions should seek medical advice before starting. Those interested in the connection between nutrition and mental well-being will find additional insights in the article “Nutrients for Inner Peace.”
Can I do sport while fasting?
Light to moderate exercise during fasting is well tolerated by most people and can support fat burning. Intensive training should ideally be carried out during the eating phase to ensure sufficient energy and regeneration.
How long does it take to see results?
Many people notice the first changes - such as more stable energy levels or more consistent blood sugar levels - after just one to two weeks. In studies, verifiable changes in body weight or blood values are usually seen after four to eight weeks of regular practice.