nutrition

How To Cut Without Wrecking Your Strength

A complete guide to running a fat-loss phase that gets you leaner without trashing your training, your sleep, or your relationship with food.

作者：Carve Log Editorial · 閱讀約 10 分鐘 · 發布於 2026/4/25

What “cutting” actually means

A cut is a deliberate calorie deficit run for a fixed period to reduce body fat while preserving as much lean mass as possible. It is not “dieting forever”. It is a phase — a window with a clear start, a target, and an end date.

The math is simple. Every body has a maintenance calorie level, the energy it burns in an average day from training, walking, breathing, and digesting food. Eat below that number consistently and the body taps stored energy, mostly fat, to make up the gap. A cut is just maintenance minus a target deficit, held long enough for the loss to add up.

You can find a starting estimate of maintenance with the tdee-calculator. Verifying it before you start is the difference between a clean fat-loss phase and four frustrating weeks of guessing.

Step 1: Estimate your TDEE accurately

A calculator gives you an educated guess. Your real maintenance is the calorie level that actually holds your weight stable. Find it before you cut.

Use the tdee-calculator for a starting estimate.
Eat at that estimate for 14 days, weighing yourself daily under the same conditions — first thing in the morning, after using the bathroom, before food or drink.
Average your seven daily weights from days 1 to 7, then the seven from days 8 to 14. Compare the two averages.
If the average is stable within roughly 0.3 kg (about 0.7 lb), the estimate is right.
If you gained, drop calories by 100 per day. If you lost, add 100 per day.
Repeat until your weight is genuinely stable across two weeks. That number is your real maintenance.

A deficit calculated from the wrong baseline either does nothing or starves you. Two weeks of patience here saves a month of guesswork later.

Step 2: Set the deficit

Once you know maintenance, the cut size is a choice based on your situation, not a moral test.

Standard deficit: TDEE minus 500 kcal per day, producing roughly 0.45 kg (1 lb) of fat loss per week. This is the default for most lifters.
Conservative cut: TDEE minus 250 to 300 kcal per day, producing roughly 0.25 kg (0.5 lb) per week. Slower, but easier on training, sleep, and mood. Good for advanced lifters and anyone with high training volume.
Aggressive cut: TDEE minus 750 kcal per day, producing about 0.7 kg (1.5 lb) per week. Reserve this for short phases of four to six weeks, or for people starting above 25 percent body fat with plenty of fat to lose.

Set hard floors: roughly 1500 kcal for men, 1200 for women. Below those levels, sleep, training, and mood degrade quickly. If your math says you should eat less than that, the answer is more cardio or more steps, not less food.

Step 3: Set protein high

Protein is the single most important nutritional lever during a cut. It preserves muscle in a deficit, increases satiety meal-to-meal, and has a higher thermic effect of food than carbs or fat — meaning more of the calories you eat from protein get spent on digestion.

Target 1.8 to 2.4 g of protein per kg of bodyweight per day.
For an 80 kg lifter, that is roughly 145 to 195 g per day. Round to a number you can hit consistently — 180 g is a clean target.
Hit protein at every meal. Spreading intake across three or four meals of 30 to 50 g each is easier on appetite than one giant evening meal.

Use the macro-calculator for the rest of the split. Carbs and fat distribute around training: more carbs on training days to fuel the work, more fat on rest days. Mid-range carb-fat ratios tend to be the most sustainable for lifters.

Step 4: Adjust training

Training in a deficit is not the same as training in a surplus. Be honest about that.

Lift volume drops by roughly 20 percent. Recovery is impaired in a deficit, and high-volume hypertrophy work tanks faster than heavy compound work. Cut accessory volume first — drop a set off your curls and lateral raises before you touch your squat.
Compounds stay heavy. Maintain rather than try to PR. Aim for the same working weights at the same RPE as your pre-cut numbers; the goal is to defend strength, not gain it.
Cardio: two or three moderate sessions per week. Walking counts. Thirty minutes after lifts or on rest days is plenty. Two thousand extra steps a day, every day, will move the needle more than one heroic Sunday session.
No fasted-cardio gimmicks. Fasted cardio does not accelerate fat loss in any meaningful way. Eat before training if eating helps you train hard. The total deficit across the day is what matters.

The progressive-overload principle still applies, but it changes shape. During a cut, “overload” means “maintain”. The next bulk is when you push for new numbers. Holding your strength while losing 5 to 10 kg is itself progress — relative strength climbs, even if absolute load doesn’t.

Step 5: Track and adjust

The number on the scale on any given day is mostly noise. Track the trend.

Weigh yourself daily, under the same conditions: same time, fasted, post-bathroom, before clothes.
Average the seven daily weights into a single weekly number.
Compare week to week, not day to day.
If you are losing 0.5 to 1 percent of bodyweight per week, hold the deficit. The plan is working.
If you have stalled for two consecutive weeks, drop another 100 to 150 kcal per day or add a cardio session.
If you are losing more than 1.5 percent of bodyweight per week, increase calories. At that rate you are losing muscle, water, and gut content, not just fat.

Daily weight will fluctuate by 1 to 2 kg from water, sodium, food in transit, and sleep. The seven-day average smooths that out. Don’t react to a single bad morning.

A 12-week worked example

A 90 kg male intermediate lifter, 22 percent body fat, real maintenance verified at 2900 kcal per day:

Weeks 1 to 4: 2400 kcal per day (a 500 kcal deficit), 200 g protein. Loses about 3 kg in four weeks. Strength holds within roughly 90 percent of pre-cut working weights.
Weeks 5 to 8: Bodyweight is now 87 kg. TDEE recalculated to about 2820. Calories drop to 2320, protein still 200 g. Loses another 2.5 kg over four weeks.
Week 9: Refeed week. Eats at 2820 kcal per day for seven days. Bodyweight rebounds about 1 kg, mostly water and glycogen. Training quality clearly recovers.
Weeks 10 to 12: 84.5 kg, TDEE around 2730. Calories at 2230. Slow week-by-week loss continues. Ends at 82.5 kg, roughly 16 percent body fat.

Total: 12 weeks, 7.5 kg lost, strength held within about 5 percent of pre-cut numbers, with one planned refeed in the middle. Use the body-fat-calculator to track the body composition trend, not just the scale weight.

Refeeds and diet breaks

Long deficits drag on the body. Two structured tools make them sustainable.

Refeed (1 to 2 days): Eat at maintenance, with the extra calories coming mostly from carbohydrate. Restores glycogen, supports leptin, brings training quality back. Useful every two to four weeks during a long cut.
Diet break (1 to 2 weeks): Eat at maintenance for a full week or two. A genuine mental and hormonal reset. Use one after eight to twelve weeks of cutting, especially if hunger, sleep, or mood have started to slide.
Reverse diet: A slow climb back to maintenance over two to four weeks at the end of a cut. Reduces the post-cut weight rebound and gives appetite time to recalibrate.

A refeed is not a “cheat meal”. A cheat meal is unstructured surplus, often well past maintenance. A refeed is planned, calorie-counted, and protein still hits target.

Common mistakes

Deficit too aggressive. Cutting at 1000 or 1200 kcal below maintenance loses muscle, kills training, and blows up adherence by week three. The 500 kcal default exists because it is the largest deficit most people can sustain without serious cost.
Protein too low. 1.0 to 1.4 g/kg sounds reasonable on paper; it is not enough during a deficit. Hit 1.8 to 2.2.
Cutting more than 16 weeks straight. Hormonal adaptation accelerates the longer you stay in deficit. Plan a one- to two-week diet break before you need one.
Daily weighing without averaging. Day-to-day fluctuation is mostly water and food in transit. The seven-day average is the truth.
Cardio as the only tool. Cardio without a calorie deficit does almost nothing. Cardio inside a deficit accelerates results. Use both.
Quitting at week 4 because the scale didn’t move. Sometimes water retention masks real fat loss for two or three weeks at a time. Trust the four-week trend, not the week-1 number.

When to stop the cut

Three signals. Any one of them and the cut is over:

You’ve hit your target body fat. Use the body-fat-calculator for the estimate and stop pushing past it just because the deficit feels routine.
Training drops 10 percent or more on multiple lifts. That is no longer a productive deficit. Eat more.
Sleep degrades, mood crashes, period stops (for women), libido tanks (for men). The hormonal cost is too high. Eat more.

A cut is a phase. End it on time. The next phase — see how-to-bulk — is where you actually grow.

Building habits that survive the cut

The mistake is treating the cut as a temporary state with “normal eating” on the other side. That mindset compounds badly: you regain fat, run another cut, regain fat, and spend years inside an exhausting cycle.

A better frame: every cut should leave you with permanent habits. Protein at every meal. A consistent training schedule defended through the deficit. A grocery list that includes vegetables. Weekly weigh-ins as a normal feedback loop, not a verdict. The cut is the framework that locks those habits in. The maintenance phase that follows is where they pay off.

How Carve Log helps

The tdee-calculator sets your maintenance baseline. The calorie-calculator turns that into a daily target with the right deficit applied. The macro-calculator sets the protein-carbs-fat split. The body-fat-calculator tracks the metric the scale alone cannot — composition, not just weight. The workout logger records the lifts you’ll defend through the deficit, week by week, so you have honest data when the cut is done. All free, no signup. Reference how-to-bulk for what comes next.

常見問題

How fast should I cut?

Aim for 0.5 to 1 percent of bodyweight per week. That rate is fast enough to see clear progress month to month and slow enough that the weight you lose is mostly fat, not muscle. Faster than 1 percent per week, and the deficit usually starts costing you strength and lean mass.

How long should a cut last?

Most cuts run 8 to 16 weeks. Past 16 weeks of continuous deficit, hormonal adaptation accelerates — hunger climbs, training quality drops, and the rate of fat loss slows even at the same calorie intake. If you need longer than that to reach your goal, plan diet breaks at maintenance to reset.

Should I do cardio while cutting?

Yes, but as a supplement to a calorie deficit, not the primary tool. Two or three sessions a week of moderate cardio — 20 to 40 minutes of brisk walking, easy cycling, or rowing — pairs well with lifting and helps the deficit without trashing recovery. Cardio without a deficit will not produce meaningful fat loss.

Can I gain strength while cutting?

Novices often can — they have so much room to adapt that even a modest deficit does not block progress. Intermediates rarely add strength on a cut; the goal becomes maintaining working weights at the same RPE. Advanced lifters should expect strength to drop slightly and accept it. The next surplus is when you push the bar up again.

What's a refeed and do I need one?

A refeed is a planned day or two at maintenance calories with extra carbohydrate, used inside a longer cut to restore glycogen, support training quality, and give the brain a break from the deficit. You probably don't need one in the first four weeks of a cut. Past that, a refeed every two to four weeks tends to make the deficit easier to sustain.

When should I stop cutting?

Stop when you've hit your target body fat, when training drops more than 10 percent on multiple lifts, or when sleep, mood, libido, or menstrual cycle (for women) clearly degrade. Any one of those is a signal that the deficit has done what it can and the cost is climbing. End the phase, transition to maintenance, and plan what comes next.