Cut, bulk or recomp? Choosing a goal

Should you lose fat first or build muscle first? If you're new to lifting, or you carry a fair amount of body fat, you may not have to pick. Lifting without a diet, or with a small one, can take off fat and add or keep muscle at the same time.^[1][2] If losing fat is your main goal, lose it slowly. If you're already lean and want more muscle, eat a little more than you burn, not a lot more.

A few words first. A calorie is a unit of food energy. Maintenance is the number of calories that keeps your weight steady. A cut means eating in a calorie deficit (fewer calories than you burn) to lose fat. A bulk means eating in a calorie surplus (more than you burn) to build muscle. A recomp, short for body recomposition, means losing fat and gaining muscle at the same time.

The choice isn't obvious because the evidence is uneven. The biggest body of recomp data comes from people with overweight or obesity.^[1] The numbers for how fast to lose or gain come mostly from expert reviews, not from trials.^[3][4]

The last article covered tracking food. This one is about what to point that log at. If deficits and surpluses are new to you, energy balance explains them.

What the wrong goal costs you

A common mistake here is going too fast. A big deficit makes muscle harder to build. In trials of people lifting while dieting, lean-mass gains were smaller than without a diet.^[5] Bulking too fast has a cost too. In small trials, bigger surpluses mostly added fat rather than extra muscle.^[6][7]

The other mistake is switching. Cut for three weeks, bulk for two, cut again. Each switch resets the trend before you can read it. Pick one direction and give it time.

What the research says

A meta-analysis pools the results of many studies on the same question into one estimate. Several of the studies below are randomised controlled trials, or RCTs. (In an RCT, people are put into groups by chance, so the groups start out alike.)

Lean mass here means fat-free mass: everything in your body that isn't fat. Muscle is a big part of it, but so are water, organs and bone.

Recomp: the clearest data is in people with more fat to lose

The same analysis looked at lifting plus eating less. That mix took off the most fat, about 5 kg. Lean mass held steady: the change was too small to tell apart from none.^[1] Limited evidence. Only 6 of the 114 trials tested that mix.^[1] "Held steady" means the trials couldn't detect a loss, not that no muscle was lost.

What about healthy adults in general? A 2022 meta-analysis looked at that group. Compared with no exercise, lifting lowered body-fat percentage by about 1.5 points (say, from 30% to 28.5%) and fat mass by about half a kilo.^[8] Moderate evidence. That's a small change, the kind you'd struggle to see in the mirror over a few months.

We found no trial that tested recomp in lean beginners directly, so for them it's a reasonable guess. An expert review says people new to lifting may be able to gain muscle faster than experienced lifters.^[4] Expert consensus. This is the authors' view, not a tested finding. How fast you can build muscle covers realistic rates.

Recomp isn't only for beginners

A 2020 review argued that people who already lift can also lose fat and gain muscle at once. The two keys, the authors wrote, are training that gets harder over time and good nutrition.^[2] Expert consensus. This is the authors' view, not a tested finding.

One small trial points the same way. Thirty young adults who already lifted, mostly men, were split into three groups of 10 for 10 weeks. Two groups ate high protein, one at maintenance and one about 250 calories below it. The third trained on its usual diet.^[9] Both diet groups added about 1 kg of fat-free mass.^[9] The deficit group lost about 3 kg of fat. The maintenance group lost about 1.4 kg, but that drop could have been chance.^[9] Limited evidence. There were 10 people per group.

A bigger deficit means less muscle gained

In trials of people lifting in a deficit, lean-mass gains were smaller than without one. The studies found no clear difference in strength gains.^[5] The analysis estimated that a deficit of about 500 calories a day was enough to stop lean-mass gains.^[5] Moderate evidence. That argues against a big, long diet while you build muscle. It doesn't mean you must eat extra.

Most of these studies were in older, mostly inactive women, many with obesity, who were losing weight.^[5] There's little data on young, lean beginners. Limited evidence for that group.

A 2025 analysis looked at lifters in a deficit. More protein went with less lean-mass loss.^[10] Limited evidence. The authors called the results exploratory.^[10] Our practical reading, from how much protein you need: if you're lean and dieting, aim for around 2 g per kg or more.

How fast to lose: the studies disagree

Mixed evidence. Here's what each side found.

In one trial, elite athletes strength trained four times a week on top of their usual training. They aimed to lose either 0.7% or 1.4% of their body weight a week.^[11] The slow group lost about 0.7% a week and gained about 2% lean mass. The fast group actually lost about 1% a week, and its lean mass barely changed.^[11] Limited evidence. Only 24 athletes were analysed, and they dieted for about 5 to 9 weeks on average.^[11]

A 2020 meta-analysis of seven studies looked at people with overweight or obesity, not at lifters.^[12] Slow and fast weight loss gave about the same total loss. The studies found no clear difference in fat-free mass. The slow groups lost about 1 kg more fat.^[12] Limited evidence for lifters, because the people studied were different.

So nobody can give you a tested best rate. A review written for natural bodybuilders advises losing about 0.5–1% of body weight a week to keep as much muscle as possible.^[3] It adds that a more gradual loss may be better for keeping lean mass.^[3] Expert consensus. This is the authors' view, not a tested finding.

How fast to gain: small surpluses are the expert advice

A review of bulking for natural bodybuilders suggests eating about 10–20% above maintenance. The target is a gain of about 0.25–0.5% of body weight a week, for beginners and intermediates.^[4] More experienced lifters should aim lower, to limit fat gain.^[4] Expert consensus. This is the authors' view, not a tested finding.

The trials on surplus size are small. In one, 21 trained lifters, all but 2 of them men, were assigned to eat at maintenance, 5% above it or 15% above it for 8 weeks. 17 finished.^[6] Faster weight gain mainly meant more fat gain, rather than more strength or muscle.^[6] Both surplus groups gained about 3.3 kg; the maintenance group gained about 0.4 kg.^[6] Limited evidence.

In another trial, 39 young elite athletes did four strength sessions a week on top of their sport.^[7] One group followed a meal plan and ate about 600 calories a day more than the group eating freely. It gained more fat. The trial found no clear difference in lean-mass gain between the groups.^[7] Limited evidence.

How to choose a goal and set the pace

Expert consensus. This is coaching practice, not a tested finding. We found no trial comparing "cut first" with "bulk first", so this is a guide, not a rule.

1. Pick the case that fits you best.

• New to lifting, with fat you'd like to lose: recomp or a slow cut. Lift, and eat around maintenance or a little below it.
• New to lifting and fairly lean: recomp. Eat around maintenance and let the training do the work.
• Fat loss is the main goal, whatever your experience: cut.
• Lifting for a while, fairly lean, and you want more muscle: a small bulk.
• Not sure: eat around maintenance for a month and see what the trend does.

2. Set the pace. Cut: lose about 0.5–1% of your body weight a week. Bulk: gain about 0.25–0.5% a week. Recomp: your weight stays about the same.
3. Eat enough protein. Lean and dieting: around 2 g per kg or more. The protein article has the numbers for everyone else.
4. Judge the trend over 2–4 weeks. Compare weekly averages, not single weigh-ins. Then nudge your calories up or down.
5. Keep training hard. Whatever the goal, keep adding a little weight or a rep over time.
6. Stay with one goal for a couple of months before you switch.

Here are the sums for three people.

• 90 kg, cutting. 0.5–1% a week is 0.45–0.9 kg a week. Lean and dieting, protein at about 2 g per kg is 180 g a day or more.
• 70 kg, bulking. 0.25–0.5% a week is about 0.18–0.35 kg a week, or roughly 0.75–1.5 kg a month.
• 55 kg, bulking. 0.25–0.5% a week is about 0.14–0.28 kg a week.

On a recomp, the scale barely moves, so it can't tell you much. Watch your lifts and a tape measure around your waist instead. Measuring progress covers how.

Common mistakes

• Cutting hard to get it over with. A fast diet feels like less suffering. But in the trials, a big deficit held back lean-mass gains.^[5] Lose about 0.5–1% a week.
• Eating everything to grow faster. "Dirty bulk" sounds like commitment. In small trials, the extra food mostly went to fat.^[6][7] Keep the surplus small.
• Thinking you need a surplus to build any muscle. In trials, people gained lean mass from lifting with no diet, and lifters gained it at maintenance.^[1][9] If you're new, start at maintenance.
• Switching goals every few weeks. Each switch resets the trend before you can read it. Pick one and give it a couple of months.
• Judging by one weigh-in. One number feels like a verdict. Use weekly averages, and on a recomp, the tape measure and your lifts.

How Gymbers fits

A goal is a direction for your calories. The Gymbers app estimates your daily calorie target with the Mifflin-St Jeor equation times an activity factor. Set a goal and the target moves by a deficit or a surplus. The app logs calories and protein against those targets, and you can log body weight and tape measurements, each with a chart. The target is an estimate, so let the trend tell you when to move it.