Purpose, water, timing and weight: how the two compare, what research says, and how to train and eat.
Updated October 2026 · 8 min read
Ramadan fasting looks like intermittent fasting, because you go without food for part of the day. But it is a different thing, with a different purpose, and the research on one does not automatically apply to the other. Here is how they compare and what that means for your health and training.
Sihha Fit is an Islamic fitness app. It builds workouts around your goal and equipment, makes halal meal plans, scans your food from a photo, tracks your progress, and has a Ramadan mode for suhoor and iftar. It is free to start, in English and Arabic.
| Ramadan fasting | Intermittent fasting (16:8, 5:2) | |
|---|---|---|
| Purpose | Worship, self-discipline and gratitude. See Qur'an 2:183. | Weight loss or metabolic health |
| Fasting window | Dawn (Fajr) to sunset (Maghrib), roughly 11 to 18 hours depending on place and season | Usually a fixed 14 to 20 hours, or 2 low-calorie days a week |
| Water | None during the fast | Water, tea and coffee are normally allowed |
| Eating window | Evening and pre-dawn, so two meals (iftar and suhoor) | One continuous window, often midday to evening |
| Length | 29 or 30 days, once a year | Open-ended, often for months |
| Flexibility | Exemptions for illness, travel, pregnancy and more, with make-up days. Ask a scholar. | You can change the plan at will |
| Social side | Shared iftars, family and prayer in the evening | Usually private |
The Qur'an prescribes fasting "that you may become mindful of God" (2:183) and describes the fast as lasting from the first light of dawn until the night (2:187). Health benefits can follow, but they are not the point.
A gentle version can. If you are used to eating all day, 2 to 3 weeks before Ramadan you can:
You do not need to "lose weight first". Do not try extreme IF before Ramadan.
Ramadan training is different from IF training, because you cannot drink during the day. Train after iftar, or lightly before it, and keep the sessions shorter. The Ramadan workout plan and the guide on workout timing and meals explain how.
No. Both involve going without food for part of the day, but Ramadan fasting is an act of worship with no food or water from dawn to sunset for about a month. Intermittent fasting is a dietary pattern chosen for health or weight, and usually allows water, tea and coffee.
On average, a little. Meta-analyses find a loss of about 1 kg, mostly temporary, with weight tending to return within a few weeks. Large evening meals and less sleep can cancel the effect.
Not according to a 2026 Cochrane review, which found intermittent fasting may make little to no difference to weight loss compared with regular dietary advice. Eating less overall seems to matter more than timing.
A gentle version helps: shift meal times gradually, cut caffeine slowly and practise waking for a pre-dawn meal. You do not need to lose weight first, and extreme fasting beforehand is not recommended.
People with some medical conditions, such as diabetes on insulin, and those who are pregnant, ill or travelling may be exempt in Islamic law. Ask your doctor about the health risks and a scholar about the ruling.
Research and guidelines:
This page is for general education. It is not medical advice and does not diagnose or treat any condition. The meals and plans are examples, not a prescription. Talk to a qualified doctor about your own health, particularly if you have a medical condition such as diabetes, and do not delay treatment because of something you read here.
Sihha Fit builds workouts and halal meal plans around your goals. Free on iPhone and Android.