Eating on a 36-Hour Duty: A Nutrition Guide for Residents and Hospital Staff
Anyone who has done a residency in India knows the rhythm: a morning round that runs into OPD, a casualty that never empties, a night on call and then another full day before you are allowed home. Twenty-four to thirty-six hour duties are still common for residents, and nurses, technicians and interns often work long, stacked shifts too.
Food is the first thing to disappear. Breakfast is a biscuit in the duty room, lunch is whatever is left in the canteen at 4 pm, dinner is Maggi at 2 am and the only constant is chai. People who counsel patients on diet all day often have the least time to eat themselves.
This is not a guide to perfect eating on duty — that does not exist. It is a set of practical defaults that fit in a white-coat pocket, survive a busy ward and help you get through the post-call day in better shape.
- Plan to eat something every 4–5 hours on duty, even if it is small and eaten standing.
- Keep a personal stash of protein-rich, no-fridge snacks in your locker or bag.
- Use caffeine strategically early in a long duty and taper it in the last hours before you plan to sleep.
- Keep a water bottle at the nursing station — dehydration feels a lot like on-call fatigue.
- Protect post-call sleep with a light meal, a dark room and a quiet phone.
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What long duties do to eating, energy and focus
Long shifts disturb the body clock, stretch the gaps between meals and push people towards quick, sugary, refined food. After a long gap, a big heavy meal often brings a slump — exactly when a sick patient arrives. Skipped water, standing for hours and air-conditioned wards that hide sweat all add to tiredness.
At night, digestion is less comfortable and hunger signals get confusing. Many staff either eat nothing and then binge at 4 am, or graze on biscuits all night. The aim is simple: regular, moderate amounts of food with some protein and fibre, enough water, and caffeine used with intention rather than by habit.
A realistic eating plan for a 24–36 hour duty
You cannot schedule emergencies, but you can decide in advance what you will eat when a window opens. This is a rough template for a duty starting at 8 am and ending the next afternoon.
| Duty phase | Common pattern | A better default |
|---|---|---|
| Before rounds (7–8 am) | Chai, skip breakfast | Eggs or paneer bhurji with roti, poha with peanuts, or curd and fruit |
| Late morning | Biscuits in duty room | Roasted chana, a fruit, a glass of water |
| Lunch (whenever possible) | Canteen leftovers at 4 pm | Dal, sabzi, roti or rice, curd — eaten by 2 pm if at all possible |
| Evening | Samosa and chai | Sprouts, sundal, peanuts or a planned shake |
| Night (10 pm–midnight) | Maggi or skipped | Proper dinner: khichdi, dal-rice, egg curry, sabzi-roti |
| 3–4 am | Sweets, fried snacks, strong coffee | Small snack: makhana, banana, curd, nuts; water |
| Post-call morning | Heavy breakfast or nothing | Light meal before sleep: idli, upma, dalia, toast with eggs |
Caffeine: use it like a tool, not a drip
Chai and filter coffee keep hospitals running, and moderate caffeine is fine for most healthy adults. The NHS and EFSA put a reasonable daily limit for most adults at around 400 mg, which is roughly four regular cups of coffee — though cup size and strength vary a lot, and hospital-canteen coffee can be strong. Individual tolerance also differs, and some people, including those who are pregnant, are advised to have much less.
The bigger issue on long duties is timing. Caffeine lasts several hours, so a large coffee at 5 am can still be working when you try to sleep post-call at noon. A practical pattern is to have your caffeine earlier in the duty or before the hardest stretch of the night, then switch to water, buttermilk or herbal tea in the last few hours. Energy drinks stack caffeine with sugar and are an easy way to overshoot; check labels.
Making the hospital canteen and your locker work for you
Most hospital canteens in India serve a reasonable thali; the problem is timing and the fried counter next to it. When you do get to the canteen, build the plate around dal, rajma, chana, eggs or paneer, add a vegetable, take a moderate portion of rice or roti, and add curd if available. Protein and fibre keep you full longer and support steadier energy than a plate of puri-sabzi.
Your locker is your backup kitchen. Stock foods that need no fridge and can be eaten in two minutes between patients. The high-protein Indian snacks guide has more options.
- Roasted chana, peanuts, makhana, soy nuts and trail mix in small pouches.
- Fruits that tolerate a bag: bananas, apples, oranges, guava.
- Peanut chikki or homemade protein bars for the 3 am slot.
- A steel bottle you refill at every chance, and a few ORS sachets for hot OTs or heavy sweating days.
- A pre-filled shaker bottle for the days the canteen closes before you get there.
Water on duty: the fatigue you might be misreading
Standing in OTs, wearing gowns and PPE, and running between wards all increase fluid needs, yet many staff avoid drinking to avoid washroom breaks during procedures. Mild dehydration can show up as headache, poor concentration and tiredness — all of which easily pass for plain call fatigue.
Keep a labelled bottle at the nursing station or doctors' room and drink a glass whenever you finish a task or write a note. The KABO water intake calculator gives a rough daily starting point, which you can raise on hot or heavy days.
The post-call day: eating for sleep and recovery
After a long duty, many people either skip food and collapse, or eat a huge greasy breakfast and sleep badly. A light, familiar meal with some protein and carbohydrate — idli-sambar, vegetable upma, dalia, egg toast or curd rice — tends to settle better before sleep. Keep the room dark and cool, put the phone on silent and avoid caffeine in the hours before.
When you wake, have a proper meal, drink water and get some daylight and a short walk. Across a rotation, structure matters more than any single day. The free KABO diet plan builder can help you set defaults around your duty roster, and the free workout plan offers short sessions that fit the few free hours between calls.
Where KABO fits in
Nothing replaces a real meal, and on good days the canteen thali and a locker full of chana are enough. But when a duty eats both lunch and dinner, KABO, an all-in-one plant-based nutrition drink, can fill the gap in about a minute. One serving gives 23–25 g plant protein from pea and brown rice, about 198 kcal, 4 g fibre, 26 vitamins and minerals, 60+ superfoods, 8 billion probiotics, 5 digestive enzymes and omega-3 from flax, and it is dairy-free, so a dry scoop in a shaker keeps in your locker.
It comes in a Butter Coffee flavour and is sweetened with stevia plus about 5 g organic cane sugar per serving. If you are watching caffeine before post-call sleep, check the pack before having it late in a duty. It is a gap filler, not a substitute for meals, water or rest.
Delivery usually takes 3–4 business days, and first orders have a 7-day money-back window, so you can see how it fits into a couple of duties.
Butter Coffee — All-in-One Nutrition Shake
23–25 g complete plant protein, 60+ superfoods, 26 vitamins & minerals, probiotics & digestive enzymes — in one 90-second shake.
Read next: Build a free diet plan around your duty roster · Free workout plan for busy schedules · Water intake calculator · Night shift nutrition: an Indian survival guide · Foods that support better sleep · High-protein Indian snacks you can eat daily
Frequently asked questions
What should doctors eat during a 24-hour or 36-hour duty?
Aim for small, regular meals every 4–5 hours built around dal, eggs, paneer, chana or curd, plus roti or rice and vegetables. Keep no-fridge snacks in your locker for when the canteen is closed.
How much coffee is too much on a night shift?
For most healthy adults, around 400 mg of caffeine a day is considered a reasonable upper limit, roughly four regular cups of coffee. Have most of it earlier in the duty and cut back before you plan to sleep.
Is it bad to eat at 3 am on call?
Not if it is a small, easy snack like makhana, a banana, curd or nuts. Large, heavy or very sugary meals at that hour tend to feel uncomfortable and make the slump worse.
What should I eat before sleeping post-call?
A light, familiar meal such as idli, upma, dalia, curd rice or eggs with toast, plus water. Avoid heavy fried food and caffeine in the hours before sleep.
Can nurses and residents use a protein shake instead of meals?
Only occasionally, when a duty makes meals impossible. Regular meals should stay the base; a shake fills a gap.
Sources: ICMR-NIN Dietary Guidelines for Indians (2024) · EFSA — Scientific opinion on the safety of caffeine · NHS — Water, drinks and your health · Mayo Clinic — Caffeine: How much is too much? · WHO — Healthy diet fact sheet
This article is general nutrition information, not medical advice. If you are pregnant, managing a medical condition or taking medication, speak to your doctor before changing your diet or starting a supplement.