How to Prepare for the Camino de Santiago: Fitness to Gear

Preparing for the Camino de Santiago means training your body for weeks of daily walking under load and choosing gear that prevents the problems most pilgrims actually face: blisters, sore knees, and an aching back. The physical demands are real but not extreme, and the gear choices matter more than most people expect. A typical stage runs 20 to 30 kilometers, day after day, which puts your preparation squarely in the endurance category rather than the athletic-performance category. Getting both halves of the equation right, fitness and equipment, is what separates a miserable first week from an enjoyable one.

What the Walk Actually Demands From Your Body

The Camino Francés, the most popular route, covers roughly 800 kilometers over 30 to 35 days. That averages out to about 22 to 27 kilometers per day, though some stages are longer. A case study of a highly trained female hiker covering a comparable long-distance route found she averaged about 26 kilometers per day with an estimated energy expenditure of around 2,334 calories daily over 70 days on the trail.¹ You do not need to be an athlete, but you do need to be comfortable walking for five to eight hours at a stretch while carrying a pack, and then doing it again the next day.

The metabolic picture during prolonged low-to-moderate walking is distinct from running or cycling. Your body shifts increasingly toward fat as its primary fuel source, which helps maintain blood glucose even when you are eating less than you are burning.² This is good news for pacing: you can walk for hours without bonking the way a runner might during a marathon, as long as you keep eating and drinking regularly. But the cumulative load across days and weeks is the real challenge. You are not training for one big event; you are training for chronic, repeated exertion.

Building Cardiovascular Fitness

You do not need a high level of aerobic fitness to walk the Camino, but you do need enough that walking at a moderate pace with a pack does not push you close to your limit. If moderate walking already leaves you breathing hard, the daily repetition will grind you down fast. The goal is to be able to walk for several hours at a comfortable pace while holding a conversation, with a loaded pack on your back.

Start training at least eight to twelve weeks before your departure, ideally longer. Walk three to five times per week, gradually increasing both distance and duration. Begin with what is comfortable, maybe 5 or 6 kilometers, and add roughly 10 to 15 percent per week. By the final few weeks of training, you want to be doing at least one weekly walk of 20 to 25 kilometers with your loaded pack. Back-to-back long walks on consecutive days are especially valuable because they simulate the Camino’s relentless daily demand. A single long walk tells you very little about how your body handles the second and third day in a row.

For older adults, the fitness bar is the same in kind, just more deliberate in approach. Research on elderly mountaineers suggests that a normal hiking ascent rate requires a moderate level of oxygen consumption, and that mild cardiopulmonary or musculoskeletal conditions are not disqualifying as long as the person can meet the fitness thresholds through regular training.³ A study of a middle-aged man completing an extended Alpine trek found that his aerobic capacity actually increased by about 13 percent over the course of the journey, with no worsening of health or functional problems.⁴ The Camino can literally make you fitter as you go, if you arrive with a solid baseline.

Strength Training That Actually Matters

Most Camino preparation advice focuses on walking more, which is correct but incomplete. The strength work that pays off on the trail is specific: your legs need to handle not just forward motion but the repeated braking forces of downhill walking, which is where most muscle damage and joint pain originate.

Downhill walking hammers your muscles eccentrically, meaning they are lengthening under load rather than shortening. Research shows that prolonged eccentric exercise from downhill walking disrupts the sensorimotor control your feet need for stable ground contact, even before your legs feel tired.⁵ In practical terms, your risk of stumbling or turning an ankle increases on long descents not because your muscles are exhausted, but because the control systems that manage how your foot meets the ground get disrupted by repeated eccentric loading. Walking with a loaded pack amplifies the effect, particularly in the hip flexors and hamstrings, where eccentric work spikes during downhill walking.⁶

The good news is that your body adapts quickly to eccentric stress if you expose it gradually. A study on downhill walking found that a single prior bout of non-damaging downhill walking reduced markers of muscle damage by roughly 47 to 64 percent on a subsequent harder bout.⁷ This is the “repeated bout effect,” and it is your best friend in preparation. Include hilly terrain in your training walks, especially downhill stretches. If you live somewhere flat, use a treadmill set to a negative grade, or find parking garage ramps or stadium stairs to walk down. Squats, lunges, and step-downs done with slow, controlled lowering (three to four seconds on the way down) build the same eccentric resilience. Start conservatively; the first few sessions will leave your quads sore for days if you overdo it.

How Heavy Should Your Pack Be

The conventional wisdom is to carry no more than 10 percent of your body weight, and for the Camino this is a sensible target. Experienced pilgrims often carry 7 to 9 kilograms including water. Every kilogram above that compounds your fatigue, changes your posture, and increases stress on your knees and lower back. A loaded backpack naturally shifts your center of gravity backward, which forces compensatory postural changes: your trunk tilts forward, your head juts ahead, and your joint mechanics change during walking.⁸ These changes feel minor at 5 kilometers but become painful over 25.

A properly fitted hip belt transfers a large share of the load from your shoulders to your pelvis. Research on load carriage shows that using a hip belt significantly decreases both mean and peak shoulder pressure, with about 30 percent fewer people reporting shoulder discomfort in the best-fitting configurations.⁹ The tradeoff is that hip discomfort can increase, and how the load shifts between your shoulders and hips affects your lower back in ways that are still being studied.¹⁰ The practical takeaway: get a pack with a real hip belt (not a decorative strap), adjust it so the top of the hip belt sits on your iliac crest (the bony ridge at the top of your pelvis), and tighten the shoulder straps just enough to keep the pack from swaying. Do your training walks with the pack loaded to its final weight so your body and the fit are both dialed in before day one.

When packing, place heavier items close to your back and centered between your shoulder blades and the top of your hip belt. Lighter items go at the bottom and the periphery. This keeps the load’s center of gravity near your own, reducing the backward pull that forces postural compensation.

Choosing Footwear

Footwear is the single most debated gear decision among Camino pilgrims, and the evidence does not clearly favor heavy hiking boots. A study of long-distance hikers found that stiffer, more rigid footwear was associated with higher rates of nerve-related symptoms (tingling, numbness) in the feet. Among hikers wearing sandals, about 29 percent reported these symptoms, compared with 68 percent of those in hiking boots.¹¹ Pack weight and footwear rigidity were not significantly associated with joint sprains, chronic pain, or muscle injuries in that study, which complicates the common argument that boots protect your ankles.

Trail runners and lightweight hiking shoes have become increasingly popular on the Camino for good reason. They are lighter, which reduces the energy cost of every step. They allow your foot to flex more naturally. And they dry faster after rain or river crossings. The main downside is less protection on rough, rocky terrain, which matters more on routes like the Camino del Norte or the Primitivo than on the well-groomed paths of the Francés.

Whatever you choose, the shoe must be broken in. Not just worn around the house for a weekend, but taken on multiple long walks at full pack weight. Your feet swell during prolonged walking, sometimes by a full shoe size, so buy footwear with enough room in the toe box for that expansion. Many experienced pilgrims size up by half a size or more from their regular shoes.

Preventing Blisters

Blisters are the most common affliction on the Camino and the number one reason pilgrims take unplanned rest days. They result from shear forces within the skin, where repeated friction causes cells in the upper layers of the epidermis to separate and the space fills with fluid.¹² Two factors drive blister formation: the magnitude of friction and the number of repetitions. Higher friction means fewer cycles needed to produce a blister. Moisture is the critical variable: moist skin has the highest friction coefficient, while very dry or very wet skin actually has lower friction.¹³

This means your best strategies are moisture management and friction reduction:

Socks: A thin liner sock under a thicker outer sock reduces friction against the skin. The layers slide against each other instead of against your foot. Merino wool or synthetic blends that wick moisture outperform cotton, which traps sweat and stays damp.
Taping: Paper tape applied to blister-prone spots (heels, the balls of the feet, toes) before you walk has moderate evidence supporting it as a preventive measure, which is actually the strongest evidence for any single blister-prevention method.¹⁴
Foot powder or antiperspirant: Keeping feet dry reduces the moisture that drives peak friction. Some pilgrims apply antiperspirant to their feet the night before walking.
Mid-day sock changes: Swapping to a dry pair of socks at lunch is one of the simplest interventions and costs nothing except a few ounces of pack weight.

Footwear ventilation also plays a role. Research on the microclimate inside shoes found that bacterial growth on foot skin correlates positively with in-shoe temperature and humidity, and negatively with ventilation rate.¹⁵ This is relevant beyond hygiene: the same hot, humid environment that promotes bacterial growth also creates the moist conditions that maximize blister-causing friction. Mesh-paneled shoes with good airflow help on both fronts.

The Case for Trekking Poles

Trekking poles are common on the Camino, and the evidence for them is genuinely mixed depending on the terrain. On flat ground, poles do not appear to reduce knee joint compression forces, even when hikers deliberately push harder on the poles.¹⁶ On downhill terrain, however, the picture changes. Using poles during descent reduced peak ground reaction forces and knee joint forces by roughly 12 to 25 percent, primarily because the poles absorb some of the braking force and the hiker shifts to a more forward-leaning posture that reduces the lever arm at the knee.¹⁷

Research on obese women walking downhill found that pole use significantly reduced markers of both muscle and cartilage damage compared to walking without poles, with the protective effect still detectable two hours after the walk ended.¹⁸ For anyone with knee issues, extra body weight, or a route with significant elevation change, poles earn their place. For flat stretches of the Meseta, they are more of a rhythm tool than a joint-saving device. Adjustable-length poles let you shorten them for uphills and lengthen them for descents, which is worth the small weight penalty over fixed-length poles.

Clothing and Layering

The Camino Francés crosses several climate zones, from the wet, cool Pyrenees and Galicia to the hot, dry Meseta in midsummer. Temperatures can swing by 15 to 20 degrees Celsius within a single day if you start before dawn and walk into the afternoon. The layering principle is simple: multiple thin layers that you add or remove as conditions change, rather than one or two thick layers that leave you either overheated or cold.

The challenge with layered clothing in cold, damp conditions is that insulation and breathability work against each other. Trapping air for warmth also traps moisture from sweat, and once insulation layers get wet, they lose much of their thermal value. Advances in textile engineering are attacking this problem, with emerging double-layer fabrics using closed-pore structures that maintain insulation even when saturated with sweat while still allowing moisture vapor to escape through gradient pore channels.¹⁹ For now, the practical version of this principle means choosing synthetic or merino base layers that wick moisture away from your skin, a mid-layer of fleece or lightweight insulation, and a waterproof-breathable shell for wind and rain. Cotton is the enemy: it absorbs moisture, dries slowly, and chills you rapidly once wet.

Most pilgrims find they need far less clothing than they pack. Two or three sets of walking clothes, one warm layer, one rain layer, and one set of evening clothes is enough. Anything you can wash in a sink and hang-dry overnight is ideal, since albergues (pilgrim hostels) rarely have dryers.

Eating and Drinking on the Trail

Your body’s metabolic shift toward fat oxidation during prolonged walking means you are less likely to “hit the wall” the way a runner or cyclist might, because your body spares its glucose stores.² Still, you burn significantly more calories than you eat on most Camino days, and the accumulated deficit over weeks leads to weight loss and fatigue if you do not make a deliberate effort to eat enough. Eat at every opportunity: a real breakfast before walking, snacks every couple of hours on the trail, a substantial lunch, and a full dinner. Nuts, dried fruit, cheese, bread, and chocolate are all calorie-dense and portable. Many pilgrims lose 3 to 5 kilograms over the course of the Francés even while eating generously.

Hydration is straightforward in concept but easy to get wrong in practice. Drink when thirsty, and carry enough water to get between reliable sources. On the Meseta in summer, towns can be spaced 10 to 15 kilometers apart with no shade and temperatures above 35°C, so carrying at least 1.5 to 2 liters is prudent. The bigger risk is actually overdrinking: exercise-associated hyponatremia, a dangerous drop in blood sodium caused by drinking too much plain water relative to sodium losses, can occur during prolonged physical activity.²⁰ Adding electrolyte tablets to some of your water, or eating salty snacks alongside plain water, helps maintain the balance. Drinking to thirst rather than forcing fluids on a schedule is the safest approach.

Managing Recovery Day to Day

On the Camino, your recovery between stages is essentially just sleep and a meal. There is no rest week built into the schedule unless you build one in yourself. Understanding how your body accumulates and recovers from damage helps you make better decisions on the trail.

Downhill walking is the primary source of delayed-onset muscle soreness. A study measuring muscle damage markers after 40 minutes of downhill walking found that participants who had no prior eccentric conditioning showed a prolonged decrease in knee extension strength of about 14 percent at 48 hours post-walk, along with elevated creatine kinase levels and soreness.²¹ This is why the first week of the Camino, which begins with a descent from the Pyrenees, is infamous for knee pain and crippling soreness among underprepared pilgrims. Eccentric preconditioning during your training, as discussed earlier, is the most effective countermeasure.

On the trail itself, a few practical strategies help. Start each day slowly and let your muscles warm up over the first kilometer or two before pushing the pace. Stretch gently in the evening, focusing on your calves, quads, and hip flexors. Elevate your legs when resting. If you develop persistent pain in a specific joint or tendon that worsens day to day rather than improving, take a rest day or a bus to the next town. Pushing through genuine injury (as opposed to normal soreness) can turn a recoverable problem into a trip-ending one.

Mental Preparation and Fatigue

One dimension of Camino preparation that gets overlooked is the mental side. Walking six to eight hours a day is monotonous, and monotony is physically draining in ways that go beyond boredom. Research has shown that mental fatigue directly impairs physical endurance: subjects who were mentally fatigued before exercising quit about 15 percent sooner than controls, not because their muscles or cardiovascular systems were more taxed, but because they perceived the effort as harder.²² On the Camino, this means that a bad night of sleep in a snoring-filled albergue dormitory, stress about logistics, or the psychological grind of the flat, featureless Meseta can make the walking feel significantly harder even if your body is physically fine.

Experienced pilgrims manage this by varying their routine: walking with different people, listening to podcasts or music on solo stretches, breaking the day into smaller mental segments rather than thinking about the total distance remaining. Some plan their rest days for the middle of the Meseta specifically because the psychological toll of that section is as real as the physical toll of the mountains. Building long, boring training walks into your preparation, rather than always choosing scenic routes, helps your mind adapt to the monotony before you encounter it on the trail.

A Practical Gear Checklist

Gear lists proliferate on Camino forums, and most of them are too long. The guiding principle is that anything you carry but do not use at least every other day is dead weight. Here is what experienced pilgrims converge on as the essentials:

Footwear: One pair of broken-in walking shoes or trail runners, plus lightweight sandals for evenings and river crossings.
Pack: A 35- to 45-liter backpack with a functional hip belt, loaded to under 10 percent of your body weight.
Clothing: Two to three sets of walking clothes in synthetic or merino, one insulating mid-layer, one waterproof shell, one set of evening clothes, and a sun hat.
Sleep: A lightweight sleeping bag or liner (most albergues provide mattresses but not bedding), plus earplugs and an eye mask for dormitory sleeping.
Feet: Blister tape, a small tube of foot cream, and two to three pairs of good walking socks.
Hydration: A one-liter water bottle minimum, plus electrolyte tablets for hot stages.
Poles: Optional but recommended if your route has significant hills or you have knee concerns. Adjustable and collapsible is ideal.
Rain cover: A pack cover or dry bags for electronics, documents, and your sleeping bag.

Everything else, the camp stove, the extra pair of pants “just in case,” the hardcover book, gets ruthlessly cut. Many pilgrims mail excess gear home from the post office in the first few days after realizing what they actually use. The lighter your pack, the more you enjoy the walk, and the less damage you do to your body over 800 kilometers. That trade-off is never worth the comfort of having one more option in your bag.