Nutrition for strength training

How to eat for maximum strength gains on 5x5. Protein, calories, meal timing, supplements, and body composition.

Lift5x5 Team ·

You can follow the 5x5 program perfectly and still spin your wheels if you ignore what happens in the kitchen. Training tells your body to get stronger. Food gives it the raw materials to actually do it.

This is not a diet guide. There are no meal plans here, no forbidden foods, no complicated macro splits. Just the nutritional principles that matter for getting stronger on a barbell program.

Why nutrition matters for 5x5

Every time you squat, bench, or deadlift, you create microscopic damage in your muscle fibers. Between sessions, your body repairs that damage and builds the tissue back slightly stronger than before. That repair process requires two things: energy (calories) and building blocks (protein).

Skip either one and recovery slows. When recovery slows, your next workout suffers. When your next workout suffers, the weight stops going up. And the weight going up is the entire point of 5x5.

You do not need a perfect diet to get strong. But you need an adequate one. The difference between “good enough” nutrition and neglecting it entirely can mean months of extra progress or months of spinning your wheels at the same weight.

Protein: the non-negotiable

Protein is the single most important nutritional factor for strength training. Full stop.

Your muscles are built from amino acids, and those amino acids come from dietary protein. Without enough of it, your body cannot repair and rebuild muscle tissue efficiently, no matter how hard you train.

How much you need

The research is consistent: 1.6 to 2.2 grams of protein per kilogram of bodyweight per day. That range covers the vast majority of strength trainees.

For an 80kg person, that means 128 to 176 grams of protein daily.

BodyweightMinimum ProteinOptimal Protein
60kg96g132g
70kg112g154g
80kg128g176g
90kg144g198g
100kg160g220g

If you are overweight, base your calculation on lean body mass or goal bodyweight rather than current weight. A 120kg person at 35% body fat does not need 264g of protein.

Best protein sources

You do not need exotic foods. These work:

  • Chicken breast, thigh, or drumstick
  • Beef, pork, lamb
  • Fish and seafood
  • Eggs
  • Greek yogurt, cottage cheese, quark
  • Milk and whey protein
  • Beans, lentils, tofu (plant-based lifters need higher total intake due to lower bioavailability)

Spread your intake across 3 to 5 meals. There is no meaningful benefit to eating protein every two hours, but cramming your entire daily intake into one meal is suboptimal for muscle protein synthesis.

If you are falling short

A protein shake is the simplest fix. Whey protein is cheap, well-researched, and effective. Mix it with milk or water and you have 25 to 50 grams of protein in under a minute. It is not magic. It is just convenient food.

Calories: the context that changes everything

Protein determines whether you can build muscle. Total calories determine whether you actually will, and how your body composition changes in the process.

Eating for strength gains (surplus)

To maximize strength and muscle gains on 5x5, eat at a modest caloric surplus: roughly 300 to 500 calories above your maintenance level. This gives your body extra energy for recovery and growth.

A surplus does not mean eating everything in sight. A 500-calorie surplus leads to roughly 0.5kg of weight gain per week. Some of that will be muscle, some will be fat. The more moderate the surplus, the better the muscle-to-fat ratio.

If you are a beginner who is underweight or lean, eating in a surplus will accelerate your progress significantly. The weights will go up faster, you will recover better between sessions, and the program will feel easier.

Eating for maintenance (recomposition)

If you eat at roughly maintenance calories with adequate protein, you can build muscle and lose fat simultaneously. This is called body recomposition.

It works, but it is slower than a dedicated bulk or cut. For beginners on 5x5, it is a perfectly valid approach, especially if you are at a normal body fat percentage and do not want to gain weight.

Your lifts will still go up. Just not as fast as they would in a surplus.

Eating at a deficit (cutting)

You can run 5x5 while losing fat, but expect your progression to slow significantly. Your body has less energy available for recovery, and building new muscle tissue becomes much harder when you are in a caloric deficit.

If fat loss is your primary goal, keep the deficit moderate (300 to 500 calories below maintenance), keep protein high (aim for the upper end of the range, around 2.2g/kg), and accept that your lifts may stall earlier than they otherwise would.

Do not try to aggressively cut while running a linear progression program. A 1000-calorie deficit and heavy squats three times a week is a recipe for burnout, not progress.

Meal timing: what actually matters

The fitness industry has overcomplicated meal timing to an absurd degree. Here is what the research actually supports:

Before training: Have a meal containing protein and carbs 1 to 3 hours before your workout. Training on a completely empty stomach is not ideal, but it is not a disaster either. If you train first thing in the morning, a banana and a protein shake is enough.

After training: Eat a meal with protein within a couple of hours after your session. The “anabolic window” is not as narrow as supplement companies want you to believe, but getting protein in reasonably soon after training is still a good practice.

Throughout the day: Spread your meals relatively evenly. Three to five meals works for most people. The exact timing matters far less than hitting your daily totals.

If you hit your protein and calorie targets for the day, you have handled 90% of what matters. Do not stress over whether you ate 37 minutes after training instead of 30.

Supplements: what works and what does not

Most supplements are a waste of money. Two are worth your attention.

Creatine monohydrate

Creatine is the single most well-researched sports supplement in existence. It works. It increases your phosphocreatine stores, which lets you produce more energy during heavy sets.

In practical terms, creatine helps you squeeze out an extra rep or two on your heavy sets. Over months, those extra reps add up to meaningfully more strength and muscle.

Dose: 3 to 5 grams per day, every day. No loading phase needed. Take it with any meal. It does not matter what time of day.

Side effect: You will gain 1 to 2kg of water weight in the first couple of weeks. This is not fat. It is intracellular water, and it is part of how creatine works.

Protein powder

Not technically a supplement, more like processed food. But useful if you struggle to hit your protein targets through whole foods alone. Whey, casein, and plant-based blends all work. Pick whatever you tolerate and can afford.

Everything else

Testosterone boosters, BCAAs, pre-workouts, fat burners, HMB, glutamine: the evidence for these ranges from weak to nonexistent for healthy individuals eating adequate protein.

If your diet is solid and you are taking creatine, you have covered the supplement basics. Save your money and spend it on food instead.

Body composition on 5x5

5x5 is a strength program, not a bodybuilding program. But your body will change.

Beginners who eat at a surplus typically gain noticeable muscle in the legs, back, and shoulders within the first two to three months. Your arms and chest fill out as bench press and row weights climb.

If you are skinny fat — a common starting point for new lifters — 5x5 with adequate protein and roughly maintenance calories will improve your body composition even without a dedicated cut. The muscle you build raises your resting metabolic rate and gives your frame more structure.

If you are significantly overweight, you can lose fat while building strength as a beginner. Keep protein high, maintain a moderate deficit, and let the program do its work. Your body will preferentially use stored fat for energy while directing dietary protein toward muscle repair.

Do not chase two rabbits at the same time by aggressively cutting while trying to set PRs every session. Pick a priority — strength or fat loss — and organize your nutrition around it.

Putting it all together

Nutrition for 5x5 comes down to four rules:

  1. Hit your protein target every day. 1.6 to 2.2g per kg of bodyweight. This is the single most impactful thing you can do.
  2. Eat enough calories to support your goal. Surplus for maximum gains, maintenance for recomp, moderate deficit if fat loss is the priority.
  3. Do not overthink meal timing. Eat before and after training, spread protein across the day, and stop worrying about it.
  4. Take creatine. 3 to 5 grams per day. It works.

If you do these four things, your nutrition is handled. You can spend the mental energy you saved on actually showing up to the gym three times per week and putting weight on the bar.

Macros & Calories

Meal Timing & Planning

Supplements

Body Composition

L
Lift5x5 Team

Helping lifters get stronger with the simplest program that works. No BS, just barbells.