Fasting · 20/4
20/4 fasting when most of the day stays empty on purpose
A twenty-hour fast with a four-hour eating window
- Pattern
- 20/4
- Fasting
- 20 hours
- Eating
- 4 hours
What 20/4 means
20/4 intermittent fasting is an advanced pattern: 20 hours fasting and 4 hours eating. Use only if shorter windows already feel sustainable.
Who it fits
- Advanced fasters with prior 16/8 or 18/6 experience
- People who prefer one concentrated eating block
- Short windows on selected days, not necessarily every day
Example day
- Example: eat from 3:00 PM to 7:00 PM
- Fast the remaining 20 hours
- Keep the block consistent when you use this pattern
How to run it in Limotein
- Pick 20/4 in Limotein
- Start at the end of the eating window
- Keep the long countdown visible on Today or the widget
- Log the condensed meals if you still track macros
Practical tips
- This is a demanding schedule. Recovery and sleep matter more
- Prioritize nutrient density inside the four hours
- Stop immediately if you feel unsafe and seek care
Limotein is a tracking tool, not medical care. Read the Disclaimer before changing how you eat or fast.
FAQ
What is 20/4 intermittent fasting?
20/4 means fasting for 20 hours and eating during a 4-hour window. It is an advanced intermittent fasting approach.
Should beginners start with 20/4?
Usually no. Most people start with 12/12, 14/10, or 16/8 and only shorten the eating window after those feel routine.
Does Limotein include 20/4?
Yes. Select 20/4, start from Today, and keep the timer in reach while you fast.
Other fasting windows
- 12/12 Equal fasting and eating windows for an easier start
- 13/11 A slightly longer fast without jumping straight to 16/8
- 14/10 Fourteen fasting hours with a daylight eating window
- 16/8 The classic intermittent fasting window, without losing the timer
- 18/6 A longer fast with a shorter six-hour eating window
- 23/1 OMAD One meal a day, with a timer that does not disappear
- Custom Set your own fasting and eating hours, then keep the clock honest
Keep the timer where you can see it.
