Royal Army College

Lesson Overview

Earlier lessons built the instructor's general toolkit: the principles of training, programming toward a goal, running a safe session, and developing strength, endurance, and good movement. This lesson turns to the one physical demand most particular to soldiering, which a general fitness programme will not produce on its own: load carriage, the carrying of a load on foot, over distance and over ground. For the Royal Kaharagian Army, a small, lightly armed home-defence force whose work is humanitarian, this is the bread-and-butter physical task. A soldier carries their own kit; they carry stores, water, and tools to where the work is; and on a relief task they carry food, shelter materials, and sometimes a person to where these are needed, often over ground no vehicle can reach. A unit that cannot carry cannot deliver, so the instructor must treat load carriage as a skill in its own right, trained on purpose.

This lesson covers why load carriage cannot be replaced by running and must be trained specifically; how to condition a soldier progressively, building the body and aerobic base first and then adding load in small steps over weeks; the technique of carrying well, in posture, packing, pace, and the management of the feet; the injury risks to the back, knees, hips, and above all the feet, and how to reduce them; and the wider idea of military or functional conditioning, training the body for the real tasks it must do rather than for appearance or gym numbers. Throughout, the instructor's first duty holds: screen before loading, progress gently, stop for injury, and refer pain beyond your competence to qualified medical and physical-training staff.

By the end you will be able to explain why load carriage is a distinct trained skill that running cannot replace, build a progressive loaded-march programme that increases distance before weight and never both at once, coach the technique of carrying a load well and the care of the feet under load, recognise and reduce the injuries that load carriage causes, and plan functional conditioning that prepares the body for the lifting, carrying, dragging, and climbing that the Army's humanitarian work actually demands.

Key Terms

Load carriage: the carrying of a load on foot over distance and ground; the central physical demand of soldiering and of humanitarian field work, trained specifically and not produced by running alone.
Loaded march: a march carried out under load over a set distance and pace, the principal means of training load carriage; known in some forces as a tab or a yomp.
Combat fitness: the ability to perform military tasks while carrying military loads over military distances, as distinct from gym or appearance fitness.
Functional conditioning: training the body for the real tasks it must do, lifting, carrying, dragging, climbing, and working under load, rather than for appearance or for numbers on a machine.
Progressive loading: the gradual increase of training stress, here of distance and then weight, in steps small enough that the body adapts without being injured.
The soldier's load: the total weight a soldier carries; long held to be best kept within about a third of body weight for a soldier who must still be useful at the end of the march.
Overuse injury: an injury caused not by a single event but by too much load or distance, too soon, repeated before the body has adapted; the commonest injury of badly progressed load carriage.
Specificity: the principle that the body adapts to the particular demand placed on it, so that the skill of carrying load is built mainly by carrying load.

Why load carriage must be trained on its own

It is tempting to think a fit soldier, one who runs well and is strong in the gym, will carry a load well without special training. He will not, and the reason is one of the plainest principles of training, specificity: the body adapts to the particular demand placed on it. Running trains the body to run; carrying load over ground trains the body to carry load over ground. The two share an aerobic base but are not the same task. A soldier who has only ever run, set under a loaded pack for the first time, meets an unfamiliar strain: the trunk and shoulders holding the weight, the hips and knees taking far more force at each step, the feet pressed harder into the boot, and a slow, grinding fatigue quite unlike the clean tiredness of a run. The body has not been prepared for it, so it fails sooner, hurts more, and is more easily injured.

A load changes almost everything about walking. The weight must be held upright by the muscles of the trunk and shoulders, which a run does not load in the same way. Every footfall lands with much greater force, so the feet, shins, knees, hips, and lower back all take a heavier blow, many thousands of times in a march. The gait shortens and stiffens, loading the joints differently again. And the work is a steady, grinding effort held for a long time, an endurance demand of its own. None of this is trained by running on a track in light clothing; it is trained by carrying load over ground. This is why the loaded march, not the run, is the central training tool of this lesson.

It matters all the more for the work the RKA actually does. Its task is humanitarian and its setting is the field: carrying relief stores up a track a lorry cannot climb, carrying water and shelter to a stricken settlement, carrying tools and timber to where a bank must be shored, and on the worst day carrying a casualty. These are load-carriage tasks, every one. A soldier who can run fast but cannot carry is of little use when the road has gone and the stores must go forward on backs. Combat fitness, which here means relief fitness just as much, is the ability to do the real task under the real load over the real distance, and it is built on purpose or not at all.

Conditioning the soldier for load, step by step

Load carriage produces a great deal of injury when it is rushed, and almost none of that injury is necessary. It comes, time and again, from the same error: too much load, or too much distance, too soon, before the body has had time to adapt. The instructor's task is to lay the demand on gradually enough that the body strengthens to meet it, which is progressive loading applied to the load. There is an order to it, and the order matters.

Build the body and the aerobic base first. Before a soldier carries serious load, two things must be in place. The first is sound general condition: the strength and movement quality of Lesson 05, so the trunk can hold the weight, the hips and knees are strong enough to take the impact, and the soldier moves well enough not to be injured by the strain. The second is an aerobic base, the steady endurance that lets a soldier work for an hour or more at a moderate effort without distress, for load carriage is before all else an endurance task and a soldier without that base will struggle no matter how willing. Lay the foundation first, through the strength and steady aerobic work the earlier lessons teach, and add load on top of a body already prepared to receive it, never as the means of building that body from nothing.

Then add load, gently, and one thing at a time. The single most important rule of load-carriage conditioning is this: increase distance before weight, and never increase both at once. Each is a stress the body must adapt to, and to raise both together is to double the demand and invite the injury you are trying to avoid. So the instructor lengthens the march at a given weight until the soldier carries it comfortably over the distance, and only then adds a little weight, dropping the distance back if need be and building it up again. Progress is made in small steps, of roughly a tenth more in any week and no more, because a tenth is about the most the body adapts to safely. A deliberately gentle build reaches a high standard sooner than a hasty one, which injury interrupts.

A worked build-up shows the shape of it. The instructor judges the starting point from the soldiers' current condition and adjusts the whole table up or down to suit; what matters is the pattern, not the exact figures.

   A PROGRESSIVE LOADED-MARCH BUILD-UP (a model, to be fitted to the soldier)

   Week | Load   | Distance | Pace        | What is changing
   -----+--------+----------+-------------+-------------------------------
    1   |  8 kg  |   5 km   | ~15 min/km  | Light load: learn the technique,
        |        |          |             | fit the pack, find the pace
    2   |  8 kg  |   6 km   | ~15 min/km  | DISTANCE up; load held
    3   |  8 kg  |   8 km   | ~15 min/km  | DISTANCE up again; load still held
    4   | 10 kg  |   6 km   | ~15 min/km  | LOAD up; distance dropped back
    5   | 10 kg  |   8 km   | ~14 min/km  | DISTANCE back up; pace a touch quicker
    6   | 12 kg  |   6 km   | ~14 min/km  | LOAD up; distance dropped back
    7   | 12 kg  |   8 km   | ~14 min/km  | DISTANCE up; load held
    8   | 12 kg  |  10 km   | ~14 min/km  | DISTANCE up; consolidate

   THE RULES, in one place:
     - distance goes up BEFORE weight, NEVER both in the same week
     - no jump bigger than about a tenth in a week
     - when weight goes up, distance comes DOWN first, then rebuilds
     - one easier week in four, lighter and shorter, to let the body catch up
     - the soldier must finish able to work, not wrecked: if not, ease back

Two limits frame the whole of this. The first is on how much load. A long-standing finding of soldiering, set out in the Basic Training Manual's reading on the soldier's load, is that a load much beyond about a third of the soldier's body weight costs more in mobility, alertness, and usefulness than it gains in what is carried; a soldier who arrives gasping and shaking is half a soldier or none. Training loads sit well below that ceiling and approach an operational load only gradually and only in the fittest, well-conditioned soldiers; the instructor never trains to the limit for its own sake. The second limit is on how fast to progress, the tenth-per-week rule above. Held to honestly, with an easier week in every four to let the body consolidate, these two limits prevent the great majority of load-carriage injuries before they start.

A word on screening, because it belongs at the front of any loading. Before a soldier begins or steps up a loading programme, the instructor satisfies themselves that the soldier is fit to carry: that they meet the general fitness the course assumes, that they are carrying no current injury that load will worsen, and that anyone returning from injury or illness is cleared and started gently. This is the duty of care of Lesson 01 made specific. A soldier loaded up while already carrying a niggling shin or a sore knee will not toughen; they will break, and the break will be the instructor's to answer for.

The technique of carrying a load well

Load carriage is a skill, and like any skill it is done well or badly. Done well, the same load travels further, more comfortably, and with far less injury; done badly, even a modest load grinds a soldier down and hurts them. The instructor coaches four things: posture, packing, pace, and the feet.

Posture: upright and balanced. The natural fault under load is to bend forward at the waist, rounding the back and dropping the head. This throws the load onto the lower back, strains the neck and shoulders, and shortens the stride. The instructor coaches the opposite: stand tall, with the weight stacked over the hips and the spine in its natural line, the head up and the eyes on the ground ahead, the shoulders down and back rather than hunched. A slight, controlled lean from the ankles into a hill is sound; a fold at the waist is not. The aim is that the skeleton, the column of the body, carries the weight, with the muscles steadying it, rather than the muscles of the back fighting the weight every step.

Packing: high, close, and stable. How a load is packed decides much of how it carries. The heaviest items go high in the pack and close to the back, between the shoulder blades and against the spine, where the body bears them most easily and where they least pull the soldier off balance; a load packed low or slung away from the back drags the soldier backward and downward and doubles the work. Pack it so it does not shift, for a load that bounces and rolls wrenches the body and tires it far faster than a dead-still one. Carry the weight mainly on the hips, through the waist belt, not hung from the shoulders: the hips and legs are strong and made for bearing weight, while shoulders hung with a heavy load go numb, ache, and cramp the breathing. The shoulder straps steady the load and stop it tipping; the hip belt carries it.

   PACKING AND WEARING A LOAD: THE POINTS THAT MATTER

        [ light, bulky kit at top ]
        [   HEAVY items HIGH and   ]   <- heaviest weight high, between
        [   CLOSE to the back      ]      the shoulder blades, against
        [                          ]      the spine: easiest to carry,
        [  medium kit              ]      least pull off balance
        [                          ]
        [ light kit, soft items at ]
        [ the bottom               ]
            ||              ||
        shoulder straps:  HIP BELT:
        steady the load,  carries the WEIGHT
        stop it tipping   on the strong hips
        (they do NOT      and legs
        carry the weight)

   CHECK BEFORE MARCHING:
     - heavy items HIGH and CLOSE to the back
     - hip belt firm on the hips, taking the weight
     - shoulder straps snug, not loaded
     - NO BOUNCE, NO RATTLE: a still load tires you far less
     - nothing digging in; nothing that will work loose and rub

Pace: steady and sustainable. The commonest error in the loaded march, and one the instructor must guard against constantly, is going off too fast. A soldier who surges away at the start burns the fuel needed for the finish and arrives degraded; a soldier who sets a steady, sustainable pace from the first step and holds it arrives still able to work. Endurance under load is in large part a matter of pacing, and pacing is a trained habit and a leadership task. The instructor sets the pace deliberately, fast enough to meet the need but no faster than the whole group can hold to the end, and teaches the soldier to settle into a rhythm of step and breath and stay in it. Take breaks on a plan rather than when someone is already failing, and at a break the load comes off where it safely can, the feet are seen to, and water is taken. Run the march so the section arrives together and arrives able, not as a race that leaves a trail of casualties because no one would call a halt.

The feet: the first thing to fail and the first thing to manage. Under load the feet take more force, sweat more in the boot, and blister more readily than at any other time, and a soldier whose feet have failed is finished, however strong the rest of them. Foot care is therefore a part of load-carriage technique and not an afterthought. The full foot drill belongs to the Field Health, Hygiene, and Sanitation course, in its lesson on personal hygiene and the care of the body, and to Navigation and Fieldcraft, in its lesson on living in the field, and the instructor points every soldier to it and reinforces it on every march. In short: boots well fitted and broken in long before a hard march, never new and stiff on the day; socks clean and dry, changed when the chance comes; and the hot spot, the patch of friction and heat felt before a blister forms, dealt with the moment it is felt, by stopping, taking off the boot and sock, and taping or dressing the spot before it goes further. This is why the feet are checked at the halt and not at the end of the day when the harm is already done. The treatment of an infected or serious foot injury is for the Combat First Aid course and qualified staff, never for the march to push through.

The injuries load carriage brings, and how the instructor manages them

Load carriage, done without care, injures, and the instructor who loads people must understand exactly how, so as to prevent it. The injuries fall into a few groups, and almost all share the same root cause and the same prevention.

The feet, first and worst. The commonest casualty of the loaded march is the foot: the blister, raised by friction on skin softened by damp, which can cripple a march and, once burst and dirtied, turn to a painful infection. Under load the risk is at its height, because the foot is pressed harder into the boot and sweats more. Prevention is the foot drill above, drawn from the Field Health course: fitted, broken-in boots; clean dry socks; and the hot spot caught at once. The instructor builds the foot check into every halt and treats a soldier limping on a hot spot not as weak but as doing exactly the right thing.

The back. A load carried badly, packed low or slung from the shoulders, with the soldier folded forward at the waist, throws strain onto the lower back, and a back strained under load is a serious and slow injury. Prevention is the technique above, upright posture and a load packed high and close and carried on the hips, together with the strength and good movement of Lesson 05 that let the trunk hold the weight. The instructor also watches how a load is lifted onto the back and set down: a heavy pack hoisted carelessly, or swung up with a twist, strains the back as surely as the march itself, and the safe way, bracing the trunk and using the legs, is coached and required.

The knees and the hips. Every footfall under load drives a heavier impact up through the knees and hips, many thousands of times in a march, and over a badly progressed programme this overloads the joints. Going downhill under load is hardest of all on the knees, because the load adds to the braking force at each step. Prevention is gradual progression, so the joints strengthen to the demand; sound strength and movement so the joints are well supported; sensible ground and a controlled pace downhill; and the limits on load and progression that keep the demand within what the body can take.

Overuse injuries, the signature of too much too soon. Above all the particular injuries sits the family of overuse injuries: shin splints, stress fractures, inflamed tendons about the ankle and knee, the lower-back strain that creeps in over weeks. These are caused not by one event but by load and distance taken on faster than the body can adapt, repeated until something gives. They are the direct and predictable result of breaking the progression rules, and they are almost wholly preventable by keeping to them: build distance before weight, never both at once, no more than a tenth in a week, an easier week in four, and a body prepared first. When an overuse injury does appear, the instructor's response is to ease the load at once and refer, not to push through; pushing through an overuse injury is exactly how a few days of niggle becomes weeks off the programme with a stress fracture.

The instructor's management of all of these rests on three habits. The first is honest progression, holding to the rules above even when soldiers are keen to do more. The second is the culture of early reporting: a soldier who says their shin hurts, or their feet are going, or their back is sore, is doing their duty and protecting the unit, and is treated so, never mocked; a unit where reporting is shamed is a unit that hides injury until it is disabling. The third is knowing the limit of your competence: the instructor prevents injury and recognises it, but the diagnosis and treatment of an injury, and the decision when an injured soldier may carry load again, belong to qualified medical staff, and pain that is sharp, that changes how a soldier walks, or that does not settle is referred to them. This duty-of-care thread runs through the whole of the instructor's work and is the subject of Lesson 07 in full.

   READING AND ANSWERING THE WARNING SIGNS UNDER LOAD

   Sign                          First action            Refer when
   ----------------------------  ----------------------  --------------------
   Hot spot on the foot          Stop; tape or dress     Blister forms or
                                 it at once              the skin breaks
   Blister                       Cover and protect;      Redness, heat,
                                 do not tear the skin    swelling: infection
   Persistent shin pain          Ease distance; softer   Pain at rest, or it
                                 ground; lighter load    does not settle
   Knee or hip pain under load   Ease load and pace;     Sharp pain, or pain
                                 check progression       that changes gait
   Sharp joint pain              STOP the session        Same day, before
                                                         any further load
   Back pain under load          Stop; check packing     Sharp, spreading,
                                 and lifting technique   or persistent

   THE RULE: pain that is sharp, that changes how you walk, or that
   will not settle is REFERRED to qualified staff, not pushed through.
   A niggle caught early is a few days; ignored it is weeks lost.

Military and functional conditioning: training for the real task

Load carriage is the most important piece of a wider idea that should govern the whole of the instructor's work: military, or functional, conditioning. The principle is that the body is trained for the real tasks it must do, not for appearance and not for numbers on a gym machine. The questions the instructor asks are operational ones. What does the work actually demand of the body? It demands carrying loads on foot over ground, for hours, the load carriage of this lesson. It demands lifting: sandbags, stores, casualties, the materials of relief work. It demands carrying awkward objects, and dragging or hauling what cannot be carried. It demands climbing and getting over and through obstacles under load. It demands working with the hands and the whole body while already tired. These are the tasks, and these are what the conditioning prepares.

This is a different aim from much civilian training, and the difference is worth making plain to soldiers. Civilian fitness often chases appearance, a single heavy lift, or a fast time on a machine. Military conditioning chases the capacity to do real work, under load, over time, reliably, and to do it still able to think and act safely at the end. The standard, as the Basic Training Manual puts it, is not being impressive but being reliable. A soldier who can lift a great weight once but cannot carry a moderate one for an hour, or who looks the part but folds under a pack, is not conditioned for the work. The instructor trains for the task, and tests against the task.

In practice this shapes the strength and conditioning work of Lesson 05 toward functional patterns and away from isolated, machine-bound exercises. The movements that matter are the ones the body uses in the field: the squat and the hinge that underlie all safe lifting from the ground; the carry, in its many forms; the drag and the haul; the press and the pull that handle and move loads; and the trunk strength that holds the body steady under all of them. These can be trained with the plainest of kit, which suits a small force that will not always have a gym: a loaded pack, a sandbag or two, a jerry can of water, a sturdy bar or branch, and the soldier's own body weight are enough to build real, useful strength. A short, regular session of loaded squats, lifts, carries, drags, and presses, progressed sensibly, conditions a soldier for the work far better than a gym full of machines used for appearance.

Functional conditioning also means rehearsing the actual demanding tasks under controlled conditions, so the body and the technique are ready for them. The casualty drag and carry are the clearest example: moving a person of full adult weight over ground is a hard, particular task, and it must be practised, with sound technique and within the duty-of-care limits, so that on the day a soldier can do it without injuring themselves or the casualty. The same goes for carrying awkward stores, for filling and shifting sandbags against a flood, for getting a load over a wall or up a bank. The instructor builds these real tasks, at controlled intensity and with safe technique, into the conditioning programme, because the surest way to be ready for a task is to have done it in training. Throughout, the duty-of-care limits hold: screen the soldier, progress the demand, stop for injury, and refer pain beyond your competence. Conditioning the body for real work is the instructor's purpose; doing it without breaking the people in your charge is the instructor's first duty.

In Practice: The Track the Lorry Could Not Climb

A section of the RKA is sent to help a coastal settlement cut off after heavy weather has washed out the only vehicle road. The relief stores, food, water, tarpaulins, and tools, are dropped at the foot of a steep track that no lorry can climb, and they must go forward on the soldiers' backs, several kilometres up and over rough, broken ground, and the section will make the carry more than once across the day. The section second-in-command holds the physical training qualification and has trained the section for exactly this, and the difference shows.

Through the spring the instructor had built the section's load carriage on purpose, knowing running fitness alone would not carry them up a washed-out track under stores. They laid the base first, the steady aerobic work and the functional strength of squats, lifts, and carries, and only then added load, lengthening the march before ever adding weight, raising the load by small steps with the distance dropped back each time, and holding an easier week in every four. No soldier had been loaded up while carrying a niggle, and a shin that grumbled in week three was eased and seen by the medic rather than pushed, and came right. By the task, the section could carry a real load over real ground and arrive able to work.

On the day the technique earns its keep. The instructor has the loads packed high and close to the back and carried on the hip belts, not slung from the shoulders, with the heavy tools between the shoulder blades and nothing left to bounce or rattle. They set a steady, sustainable pace up the track, not the fast surge a keen soldier wanted, so the whole section reaches the top together and still able to lift and stack, and they call the halts on a plan, not when someone is already failing. At each halt the feet are checked, and one soldier's hot spot is taped before it can blister, saving a foot that would have ended that soldier's day. Coming back down under the empty packs the instructor keeps the pace controlled, mindful that the descent is hardest on the knees. By dusk the stores are up, the settlement is supplied, and the section is tired but sound, ready to do it again tomorrow. A section trained only to run, loaded for the first time on the day and sent up fast with badly packed weight on their shoulders, would have arrived wrecked, blistered, and strained, with stores still at the bottom and soldiers needing care rather than giving it. The carry succeeded because load carriage had been trained as the particular skill it is.

Check Your Understanding

Explain, using the principle of specificity, why a soldier who is fit only from running cannot be assumed to carry a load well, and name the physical reasons load carriage strains the body differently from running. Why is this skill especially central to the RKA's humanitarian work?
Set out the order in which a soldier is conditioned for load, from the foundation to the loaded march itself, and state the two governing rules of progression and the two limits on how much load and how fast to add it. Why does increasing distance before weight, and never both at once, prevent injury?
Coach the four parts of carrying a load well, posture, packing, pace, and the feet, naming the key point of each. Then name the main injuries load carriage causes and the single root cause most of them share, and explain how the instructor manages them and when pain must be referred beyond their competence.

Reflection (write a short paragraph): This lesson argues that load carriage is the bread-and-butter physical demand of the RKA's work, that it must be trained on purpose because running will not produce it, and that almost all of its injuries come from one avoidable error, too much load or distance too soon. Think of a real relief task the Army might face in which stores or a casualty must go forward on foot over ground a vehicle cannot reach. As the instructor who prepared the section for it, which part of the work, the patient progression over weeks, the technique of packing and pacing, the foot care, or the honest reporting of niggles, do you think would be hardest to hold to when soldiers are keen to do more and the task is pressing, and how would you keep to your duty of care while still building a section that can genuinely carry?

Summary

Load carriage, the carrying of a load on foot over distance and ground, is the central and most particular physical demand of soldiering and of the RKA's humanitarian work, and by the principle of specificity it must be trained on purpose, mainly by the loaded march, because running alone will not produce it.
A soldier is conditioned for load in order: the body and the aerobic base first, then load added gently on top, by the governing rules that distance increases before weight and never both at once, in steps no larger than about a tenth a week, with an easier week in four, kept within sensible limits on load (well within about a third of body weight) and screened for fitness before each step.
Carrying a load well is a skill in four parts: posture upright and balanced with the weight on the skeleton; the load packed high, close to the back, and stable, carried on the hips through the waist belt with no bounce; a steady, sustainable pace set so the section arrives able to work; and the feet managed by fitted, broken-in boots, dry socks, and the hot spot caught at once, with the full foot drill taught in the Field Health, Hygiene, and Sanitation course and Navigation and Fieldcraft.
The injuries of load carriage fall on the feet first, then the back, the knees, and the hips, with overuse injuries, shin splints, stress fractures, and inflamed tendons, the signature of too much too soon; the instructor prevents them by honest progression, sound technique, and a culture of early reporting, and refers sharp or persistent pain to qualified staff rather than pushing through it.
Military or functional conditioning trains the body for the real tasks it must do, lifting, carrying, dragging, climbing, and working under load, rather than for appearance or gym numbers, using plain kit and the rehearsal of real tasks at controlled intensity; throughout, the duty of care holds, to screen, progress, stop for injury, and refer. This lesson sits between Lesson 03 (programming and periodisation) and Lesson 05 (strength, endurance, and movement) on which it builds, and Lesson 07 (recovery, nutrition, and the prevention of injury) which carries the injury thread further; moving under load is taken up again in the Navigation and Fieldcraft and Cold-Weather Operations and Survival courses, and the care of the body in Field Health, Hygiene, and Sanitation.

Load Carriage and Military Conditioning