Emergency services nutrition: how to eat well on shift

Written by James Frost, founder of Flaming Phoenix and the maker of Phoenix Bars. Updated November 2026.

Quick answer: The hardest part of eating well on shift is getting the chance to eat, so keep no-prep food in your locker, vehicle and pocket and eat a small amount, around 150 to 200 calories, every two hours. Over a 12-hour shift that adds up to roughly 900 to 1,200 calories from snacks alone, enough to cover a lost meal break.

Shift work scrambles your mealtimes, callouts interrupt food you have already prepared, and on a late shift the only options are often a vending machine or a drive-through. So stop relying on sit-down meals and keep a stash of no-prep, calorie-dense food (nuts, oatcakes, high calorie bars) you can eat one-handed in the cab, the appliance or the back of the vehicle between jobs. Below I go through each service in turn, then how to keep eating when the job will not let you stop.

About this guide

Written by James Frost, founder of Flaming Phoenix and the maker of Phoenix Bars. Where this gets technical I draw on published research into occupational energy demands and shift-work eating. Nothing here is official guidance from any fire, police or ambulance service. This guide sits alongside our military field nutrition and night shift nutrition guides. Last reviewed November 2026.

Key points

The biggest barrier to eating well on shift is timing, not food choice. Callouts and night shifts routinely wreck normal mealtimes, and food prepared in advance often goes uneaten.

Emergency work can be extremely physical. US wildfire guidance puts crews' needs on the fire line at 4,000 to 6,000 calories a day, and fire crews are studied as tactical athletes alongside soldiers.

US Forest Service guidance for wildland fire crews is to graze: 150 to 200 calories every two hours during the shift, rather than one big meal.

The food that works on shift is transportable, needs no preparation, survives a locker or kit bag, and can be eaten one-handed between jobs.

Night shifts need their own approach, because the body handles food less efficiently overnight.

Keep a stash in your locker, your vehicle and your pocket, so that when a meal break disappears, you still eat something.

Contents

The real nutrition problem in emergency services. How much energy the job demands. Fire and rescue. Police. Ambulance and paramedics. Search and rescue, mountain rescue and lifeboat crews. How to actually eat across a shift. How often to eat on a 12-hour shift. Where Phoenix Bars fit. Frequently asked questions.

The real nutrition problem in emergency services

The core challenge is not knowing what to eat, it is getting the chance to eat it. Research into UK police officers found that the most common effect of shift work on diet was simply a loss of consistency in meal timing, with officers regularly sleeping through normal mealtimes and unable to hold any routine.

Even when food is prepared in advance, it often does not get eaten, because the on-the-go nature of the job interrupts any attempt at a proper meal. Long shifts and forced overtime leave little time or energy to cook between shifts, so food gets bought on duty instead.

The options on duty are frequently poor. With station canteens largely gone and few healthy choices available late at night, many crews fall back on vending machines, forecourts and fast food. The result is predictable: under-fuelling during the demanding parts of a shift, then over-eating convenience food when the chance finally comes.

Solving this is a logistics job. If you accept that sit-down meals will sometimes vanish, the fix is to always have transportable, no-prep food within reach, so a missed break does not have to mean a missed meal.

How much energy the job demands

Emergency work swings between long periods of readiness and sudden bursts of intense physical effort, and the effort end of that range is significant. Wildland firefighting is one of the most physically demanding jobs studied: the US National Wildfire Coordinating Group says crews on the fire line need 4,000 to 6,000 calories a day to avoid a deficit.

Structural firefighting carries its own load: working in heavy turnout gear, in extreme heat, hauling equipment and people, all in short maximal bursts. Police foot pursuits and restraint, paramedics lifting and carrying patients, and rescue crews working for hours on a hillside or at sea all sit at the demanding end too.

The guidance for those crews is telling. Rather than one big meal, the US Forest Service's technology and development programme recommends eating 150 to 200 calories every two hours during the work shift, the same little-and-often approach ultra-endurance athletes use to keep going for hours.

The studies also show a consistent pattern of under-eating relative to output during the hardest deployments, and that deficit is what leaves people fatigued and slow to think late in a shift. For the everyday demands of a heavy, physical job, our calorie-dense foods guide and high calorie snacks guide cover the broader picture.

Fire and rescue

Firefighters are best understood as tactical athletes: long shifts, disrupted sleep, and unpredictable, maximal bursts of work in punishing conditions. The body is asked to go from standing to full output in minutes, and to keep functioning physically and mentally for hours once committed to an incident.

That makes steady fuelling between calls more important than a single perfect meal. Keeping easy energy on hand at the station, and something compact in a pocket or bag for a prolonged incident, helps avoid the slump that comes from a long job on an empty stomach. Crews who carry and haul heavy kit will also recognise the load-carriage demands covered in our rucking nutrition guide.

Because a shift can be quiet for hours then suddenly intense, the practical habit is to eat opportunistically: top up during the lulls so you are not starting a demanding job already depleted. A bar you can keep at the ready and eat in a couple of minutes, or turn into a quick porridge at the station, fits that pattern well.

Police

For police officers, the defining nutritional problem is the one the UK research highlighted: meals that are planned but never happen. A response shift can turn on a single call, and a meal break can vanish or slip by hours, so any food that depends on sitting down to eat is unreliable.

The job also blends long sedentary periods with sudden, intense physical effort: a foot pursuit, a restraint, a search. Going into those moments under-fuelled, late in a shift, after sleeping through breakfast, is common and avoidable.

The realistic fix is a personal stash that does not need a canteen, a microwave or even a free hand for long. Something in the vest pocket, the locker and the vehicle means that when the break disappears, you still get fuel in. Night shifts bring their own timing problems, covered in our night shift nutrition guide.

Ambulance and paramedics

Ambulance crews face the meal-timing problem in its sharpest form, often going from job to job with breaks delayed or lost entirely across a twelve-hour shift. Research following new paramedics into rotating shift work has documented the diet and body-composition changes that come with it.

The physical demands are real and repetitive: lifting and carrying patients, manoeuvring equipment, working at awkward angles, often through the night. Combined with high stress and broken sleep, this is a recipe for skipping meals and then grabbing whatever is quickest.

What works is food that survives in the cab and can be eaten in the brief window between clearing one job and being assigned the next: no prep, no mess, one hand. Keeping a couple of options on the vehicle means a late or lost break does not leave you running on empty for the back half of a shift.

Search and rescue, mountain rescue and lifeboat crews

Search and rescue teams, mountain rescue, and lifeboat and coastguard crews sit at the most expedition-like end of the emergency services. Callouts can be long, cold, wet and physically arduous, often in remote terrain or at sea, with no chance to resupply once committed.

For these crews the priorities are the ones that decide the best energy bars for expeditions: compact, lightweight, calorie-dense food that can be carried in a pack and eaten on the move. A long hillside search or a sustained shout can run for many hours, and the cold itself pushes calorie needs up, so carry more than the length of the job suggests.

This is the same problem our high-altitude and wild-camping guidance addresses, and the principles in our ultra-endurance and expedition nutrition guide carry straight across. A dense bar can be eaten cold on the hill, or stirred into water as a porridge at the end of a long shout.

How to actually eat across a shift

Graze rather than gamble on one meal. Take small amounts regularly through the shift, so your energy and concentration stay level and you are never relying on a break that might not come. This is the same logic that fire crews are taught and that ultra-endurance athletes live by.

Build a stash in three places: your locker, your vehicle or appliance, and your pocket or kit bag. Stock it with food that needs no preparation, does not spoil across a shift, survives being knocked about, and can be eaten one-handed. That is the difference between eating something and eating nothing on a bad night.

Treat night shifts as their own problem. The body processes food less efficiently overnight, so heavy meals in the small hours tend to sit badly and disrupt the sleep that follows. Lighter, steady fuelling through the night usually works better, and our night shift nutrition guide goes into the timing in detail.

Do not forget fluids. It is easy to under-drink across a busy shift, especially in turnout gear or body armour, and mild dehydration shows up as fatigue and poor concentration long before you feel thirsty.

How often should you eat on a 12-hour shift?

Aim for something small every two hours or so. At the 150 to 200 calories every two hours that US Forest Service guidance gives wildland crews, a 12-hour shift is six small top-ups, roughly 900 to 1,200 calories, on top of whatever meals you manage. The portions below each give about 150 to 200 calories, using typical UK values; check the label, as brands vary.

Mix something salty or savoury in with the sweet options, because a run of night shifts on sweet food alone gets hard to face. Restock the stash at the start of each set of shifts rather than when it runs out.

Where Phoenix Bars fit

I make Phoenix Bars, so weigh this section with that in mind. They suit the one constraint that defines this work, getting calories in when you cannot stop for a meal: a bar needs no preparation, can be eaten one-handed in the cab or on an incident, keeps in a locker or kit bag, and carries up to 557 calories in a compact, 120g bar, so two bars can stand in for a missed meal.

They are vegan and gluten-free, so the same product works across a watch or a crew without anyone needing a separate option, and they come in six flavours (Apple and Cinnamon, Cherry Bakewell, Chocolate, Vanilla, Salted Caramel and Ginger) so they do not get boring over a run of shifts. On a cold rescue or a quiet night at the station, a bar can also be made into a porridge with water, which our how to use Phoenix Bars guide explains.

A bar is fuel for the gaps, not a replacement for proper meals on your days off. What it does is make sure that when the break disappears, you still eat.

To try them across a few shifts, start with the starter bundle of 12 bars, or the essential (18 bars) and complete (36 bars) bundles to keep a locker and a vehicle stocked. You can see the full range in the Phoenix Bars collection and the bundles collection.

Frequently asked questions

What should emergency services workers eat on shift? Eat transportable, no-prep, calorie-dense food in small amounts through the shift, and treat a proper meal break as a bonus. Good options include nuts, dried fruit, oatcakes, bananas and high-calorie bars, kept in your locker, vehicle and pocket so a missed break does not become a missed meal.

What should firefighters eat on shift? A carbohydrate-based meal before the watch, then small snacks through the shift so you never start a big job on an empty stomach. On long incidents, aim for 150 to 200 calories every two hours, the figure US Forest Service guidance gives wildland crews, and drink to a plan in heat or turnout gear. After a hard job, a proper meal with some protein helps you recover for the next one.

How many calories do emergency services jobs burn? It varies enormously by role and task, but the physical end is high: US guidance puts wildland firefighters' needs on the fire line at 4,000 to 6,000 calories a day. Even away from that extreme, long shifts and sudden intense effort make under-eating common.

How do you eat when you do not have time to stop? Keep a stash of food you can eat in two minutes with one hand, and graze during the quiet periods so you are topped up before the busy ones, rather than gambling on a single sit-down meal.

What is the best food to keep in your locker or vehicle? Choose food that needs no preparation, does not spoil over a long shift, survives being knocked around, and can be eaten one-handed: nuts, dried fruit, jerky, oatcakes and high-calorie bars all qualify. The point of a stash is that it is always there when a meal break is not.

How should night shift workers in the emergency services eat? Favour lighter, steady fuelling through the night rather than a heavy meal in the small hours, because the body handles food less efficiently overnight and large night-time meals can disrupt the sleep that follows. Our night shift nutrition guide covers the timing in detail.

Are there good vegan options for shift work? Yes: nuts, dried fruit, oatcakes, bananas, nut butter and plant-based high-calorie bars all travel well and need no preparation. A vegan, gluten-free bar is a simple way to keep one option that works for everyone on a crew with mixed dietary needs.

Related guides

Closest companions: our military field nutrition guide for tactical and field eating, our night shift nutrition guide for the shift-timing detail, and our rucking nutrition guide for load-carrying roles. For the broader picture see our calorie-dense foods and high calorie snacks guides, and the ultra-endurance and expedition nutrition guide this page sits within. If you are instead looking for home emergency food supplies, that is a different topic, covered in our emergency food preparedness guide.

Whatever you choose, keep something you can eat in two minutes in your locker, your vehicle and your pocket.

Training a watch, a station or a team? Email me directly at jfrost@flaming-phoenix.co.uk. James Frost, founder, Flaming Phoenix.

Sources: National Wildfire Coordinating Group, Firefighter nutrition; Allen, Safi and Deb, An exploration into the impact that shift work has on the nutritional behaviours of UK police officers, British Journal of Nutrition (2023); McCance and Widdowson's CoFID 2021; Phoenix Bar values from our own pack labels.