Bulk or cut?
Most people asking this question do not need either one. The check below gives a starting point in a minute; the rest of the page says why.
Bulk, cut or recomposition?
Measure your waist halfway between your lowest rib and the top of your hip bone, after breathing out.
A starting point from two screening lines, not a diagnosis or a prescription. For adults 18 and over, not pregnant. If you have a medical condition or an eating disorder, ask a doctor or registered dietitian first. Nothing you type here leaves this page.
Start with the habit that matters most: log your next workout and Perdura tells you what to lift the time after. Free, no card.
The short answer
A bulk means eating more than you burn to build muscle, and accepting some fat with it. A cut means eating less than you burn to lose fat, and trying to keep the muscle. Body recomposition sits between them: eating around maintenance while lifting and getting enough protein, so muscle goes up and fat goes down in the same months.
For someone new to lifting, coming back after a break, or carrying fat around the middle at a normal weight, recomposition is usually the place to start. A review of the studies found it happens most readily in exactly those people, and that trained lifters can do it too.
When a cut comes first
When both your weight and your waist are above the screening lines (a BMI of 25 or more, and a waist more than half your height), a deficit does more of the work. Lifting and enough protein still come first: they are what keep the muscle while the fat comes off.
A modest deficit is easier to keep than a hard one, and it leaves room to train well. The waist line is a screening tool from a review of studies across many countries, not a diagnosis.
When a slow gain makes sense
Two kinds of people do better with a slow gain. If your weight is below the usual range (a BMI under 18.5), eating less is not the answer: eat a little more than you burn and lift. If you lost weight without trying, talk to a doctor.
And if you are lean and have trained steadily for years, recomposition gets slow. A review of nutrition for natural lifters suggests a small surplus, about 10 to 20% over maintenance, gaining about 0.25 to 0.5% of body weight a week, with less for the most advanced.
Why recomposition suits most skinny-fat bodies
A skinny-fat body has a normal weight, too little muscle and some fat around the middle. A bulk adds more of that fat before the muscle shows. A cut takes weight away from someone who already has too little muscle. Both tend to leave you where you started.
Eating around maintenance, lifting a little more each time and keeping protein steady changes the body underneath while the scale stays roughly flat. It is slower than a bulk or a cut, which is why the waist, the lifts and the weight trend matter more than any single weigh-in.
Choosing it in Perdura
Setup asks for your goal. "Build muscle and lose fat" is recomposition: Perdura plans the months for you, with maintenance blocks and modest deficit blocks. "Lose fat, keep your strength" is the cut, and no day of it goes below a calorie floor.
Perdura does not plan a surplus. For a slow gain, choose "Keep your weight, get stronger" and raise the calorie targets yourself; protein stays the same. Whatever you choose, the workout log and its next-time verdict are free.
Start with the habit that matters most: log your next workout and Perdura tells you what to lift the time after. Free, no card.
Out of skinny fat
Five short emails, one a week: what skinny fat is, why a bulk and a cut both fail, and the habits that work. Free, and you can stop any time.
Sources
- Barakat C, Pearson J, Escalante G, Campbell B, De Souza EO. Body Recomposition: Can Trained Individuals Build Muscle and Lose Fat at the Same Time? Strength Cond J. 2020;42(5):7-21.
- Iraki J, Fitschen P, Espinar S, Helms E. Nutrition Recommendations for Bodybuilders in the Off-Season: A Narrative Review. Sports (Basel). 2019;7(7):154.
- Browning LM, Hsieh SD, Ashwell M. A systematic review of waist-to-height ratio as a screening tool for the prediction of cardiovascular disease and diabetes: 0.5 could be a suitable global boundary value. Nutr Res Rev. 2010;23(2):247-69.