Fitness for Preparedness · Chapter 6
Everyday eating that builds physical capacity. Emergency eating that maintains it. And a pantry audit so your stored food can actually do both jobs.
The frame
Most nutrition advice focuses on one job at a time. For preparedness purposes, all three matter simultaneously — and the emergency scenario changes the priority order.
Energy for movement, work, and thermoregulation. Carbohydrates fuel moderate-to-high intensity work. Fats fuel sustained low-intensity effort. Both matter in emergency scenarios.
In an emergency: fuel needs are higher during heavy physical work, lower during sedentary shelter-in-place.
Protein for muscle repair and maintenance. Micronutrients for immune function and wound healing. Calorie-dense but protein-poor pantries leave the body unable to recover from physical stress.
In an emergency: repair needs increase after heavy physical work days. Protein becomes the most critical macronutrient.
Blood sugar regulation, mood stability, cognitive function, and sleep quality. Poor blood sugar management degrades decision quality before physical capacity — the most underestimated nutritional job.
In an emergency: fat and protein stabilize; simple carbohydrates alone destabilize.
Day to day
The physical capacity built in Chapters 2–5 depends on consistent nutrition to adapt and hold. These are the decisions that matter most — not a meal plan, not macros to count.
01
Protein is the building material for every adaptation from training. Without adequate protein, strength work produces soreness but not strength gain. ACSM recommends 1.2–2.0 g per kilogram of bodyweight daily for active adults.1 For a 170 lb (77 kg) person, that is 92–154 grams per day.
Good everyday sources
Eggs, canned fish (tuna, salmon, sardines), Greek yogurt, beans and lentils, chicken, cottage cheese, nut butters.
Good shelf-stable sources
Canned sardines (25g per can), canned tuna (20g), dried lentils (18g per 100g dry), peanut butter (8g per 2 tbsp), pumpkin seeds (9g per oz).
The practical check
Does every meal contain a protein source? If not, add one. This single habit covers most protein gaps without counting grams.
02
Complex carbohydrates (oats, brown rice, sweet potatoes, whole grain crackers) release energy over two to four hours. Simple carbohydrates produce rapid energy followed by a drop. For sustained physical work, a blood sugar crash during hour three of cleanup is avoidable — and worth avoiding.
Prefer these
Oats, rice, sweet potatoes, beans, whole grain crackers, lentils. Long shelf life, high satiety, stable energy release.
Use simple carbs strategically
A banana before a loaded walk is appropriate fast fuel. A bag of crackers as your only fuel for a six-hour work day is not.
03
Fat is calorie-dense (9 cal/g), satisfying, and the primary fuel for low-intensity sustained work. Diets that aggressively restrict fat leave people under-fueled for long work days. Nuts, olive oil, fatty fish, and nut butters are excellent shelf-stable fat sources with long shelf lives.
The pantry implication
Do not build a fat-free pantry in an attempt to be healthy. Olive oil, nuts, and canned fish in oil are nutritionally essential, not optional extras.
04
Sweat depletes sodium, potassium, and magnesium. During heavy physical work — especially in heat — electrolyte depletion produces cramping, fatigue, and eventually dangerous imbalances before thirst becomes a reliable signal.2 Salt is both a preservative and an essential electrolyte. Your stored food supply should include more salt than you think you need.
Practical sources
Salt (sodium), bananas and potatoes (potassium), nuts and seeds (magnesium). During heavy work, add a pinch of salt to water and eat something with potassium at lunch.
Note on low-sodium
Low-sodium canned goods are a marketing-driven choice that works against electrolyte needs during physical work scenarios. Standard-sodium canned goods are appropriate for emergency pantries.
When normal cooking stops
Emergency eating is not about optimal nutrition. It is about maintaining functional capacity from a limited and possibly no-heat food supply.
Sedentary shelter-in-place
1,800–2,000
Minimal movement. Primarily waiting. Heat or AC available.
Normal household activity, no power
2,000–2,400
Moving around the house, some manual tasks, temperature management.
Active response / cleanup work
2,500–3,500
Heavy physical work: moving debris, carrying supplies, shoveling, prolonged outdoor activity.
Evacuation on foot
3,000–4,000+
Extended walking with a loaded pack. Most people underestimate this by 30–40%.
Eat on a schedule. Stress suppresses appetite. Skipping meals during physically demanding scenarios degrades performance faster than any other single factor.
Prioritize protein and fat over simple carbs. Most emergency pantries skew toward crackers and simple starches. These provide energy but poor satiety and poor recovery nutrition.
Salt your food more than usual. Physical work increases sodium loss. Under-salting during heavy work days is a real performance and health risk, especially in heat.
Eat what you have stored. Practice eating from your emergency pantry once or twice a year. Many people store food they would not actually choose to eat.
Know what requires heat. Canned beans, nut butters, crackers, dried fruit, canned fish require no cooking. Know which pantry items need heat and which do not before you need that information.
The practical check
Five questions. If you can answer yes to all five, your pantry can sustain physical capacity during a disruption.
01
Does your pantry contain at least three protein sources?
Canned fish, beans/lentils, nut butters, and nuts all count. One protein source is a single point of failure.
02
Can you assemble 2,500 calories per person per day for two weeks without a stove?
No-heat foods: canned goods, crackers, nut butters, nuts, dried fruit, protein bars, cold-soaked oats. Run the math at least once.
03
Does your pantry contain salt, fat, and a potassium source?
Salt, olive oil or nuts, canned tomatoes or beans. These three close most nutritional gaps in emergency eating.
04
Have you eaten a full day from your emergency pantry in the past year?
If not, you do not know whether you can tolerate the food, whether meals are satisfying, or whether you have the equipment to prepare them.
05
Does your pantry account for special dietary needs in your household?
Diabetes, celiac, nut allergies, infant formula, dietary restrictions. Emergency conditions are not the time to discover a medical diet is unaddressed.
Practical skill
Four numbers tell you almost everything you need to know about whether a food belongs in your pantry or your pack.
Cal
Check the serving size first. Many packages contain 2–3 servings. For calorie-dense emergency food, look for 400–600 calories per serving at minimum.
Pro
Look for at least 10g per serving for a food to count as a protein source. Under 5g is a carbohydrate food regardless of what the front label implies.
Na
High sodium in canned goods extends shelf life and supports electrolyte needs during physical work. Low-sodium emergency food is a marketing-driven choice that works against performance.
Date
Check the best-by date and storage instructions. A food requiring refrigeration after opening is not truly shelf-stable for emergency use without a reliable cold supply.
Sources