The key to a successful cut is losing fat slowly enough, eating enough protein, and keeping your training intensity high. Rush the process or drop calories too aggressively, and your body starts breaking down muscle for energy. But with the right approach, you can hold onto nearly all your muscle while steadily dropping body fat over weeks or months.
How Aggressive Your Deficit Should Be
The size of your caloric deficit is the single biggest factor determining whether you lose mostly fat or a mix of fat and muscle. A good target is losing 1 to 2 pounds per week, which typically means eating 500 to 1,000 calories below your total daily energy expenditure. For most people, that works out to roughly 0.5 to 1% of body weight per week.
If you’re leaner (under 15% body fat for men, under 25% for women), aim for the slower end of that range. Leaner individuals have less body fat available to fuel the deficit, so the body turns to muscle tissue sooner. If you’re carrying more fat, you can sustain a slightly larger deficit without as much muscle loss risk. Either way, resist the temptation to slash calories dramatically. A 1,500-calorie daily deficit might speed up the scale, but a meaningful chunk of that weight will be muscle.
Protein Is Your Top Priority
During a cut, protein does double duty: it provides the building blocks your muscles need to repair after training, and it has the highest thermic effect of any macronutrient, meaning your body burns more calories digesting it. Most evidence points to a range of 0.8 to 1.2 grams of protein per pound of body weight daily during a deficit. If you weigh 180 pounds, that means roughly 145 to 215 grams per day.
Spread your protein across at least three to four meals. Each feeding should contain enough to trigger muscle protein synthesis, generally 25 to 40 grams depending on your size. Prioritize whole protein sources like chicken, fish, eggs, Greek yogurt, and legumes. Protein shakes are fine for convenience, but they shouldn’t replace the majority of your intake. On days when appetite is low (common during a cut), a shake can help you hit your target without forcing down a full meal.
Keep Lifting Heavy
This is where many people sabotage their cut. The instinct is to switch to lighter weights and higher reps, treating resistance training more like cardio. That’s a mistake. The stimulus that built your muscle is the same stimulus that keeps it. If you stop challenging your muscles with heavy loads, your body has no reason to maintain expensive muscle tissue during an energy deficit.
Aim for 2 to 4 resistance training sessions per week at minimum, and focus on progressive overload: gradually increasing weight, reps, or intensity over time. You probably won’t be setting personal records during a cut, and that’s fine. The goal is to maintain or come close to your current strength levels. If your bench press drops from 225 for 8 reps to 225 for 6, that’s a normal response to fewer calories. If it drops to 185, your deficit is likely too aggressive or your recovery is suffering.
Compound movements (squats, deadlifts, rows, presses) give you the most muscle-preserving stimulus per session. Keep your total training volume reasonable. You don’t need to add sets during a cut. In fact, slightly reducing volume (maybe dropping one or two sets per exercise) while keeping intensity high can help you recover better on fewer calories.
How to Handle Cardio
Cardio is useful for widening your deficit without cutting more food, but the type of cardio you choose matters. High-intensity interval training engages fast-twitch muscle fibers, the same fibers activated during resistance training. That makes HIIT a reasonable option that can actually support muscle retention. Low-intensity steady-state cardio (walking, easy cycling) primarily uses slow-twitch fibers and has minimal impact on muscle growth, but it’s also easier to recover from.
The practical approach: use walking as your primary cardio tool (10,000 to 12,000 steps daily is a reliable target), and add one or two HIIT sessions per week if you need extra calorie burn. What you want to avoid is excessive cardio volume, especially long moderate-intensity sessions like 45 to 60 minutes of jogging multiple times per week. That combination of high energy expenditure and repetitive stress creates the most interference with muscle recovery. If you’re doing six hours of cardio per week during a cut, you’re almost certainly losing more muscle than necessary.
Use Refeeds to Your Advantage
Extended calorie restriction triggers a cascade of hormonal changes that work against muscle retention. Cortisol rises, leptin drops, thyroid hormones slow, and your body becomes increasingly efficient at conserving energy. Periodic refeeds, days where you temporarily bring calories back to maintenance, can counteract these adaptations.
A study on resistance-trained men and women found that alternating 5 days of calorie restriction with 5 days of refeeding over a 7-week diet period resulted in significantly more muscle retention compared to continuous dieting. The refeeding group held onto more lean mass while still losing fat. Other research shows that hormonal markers like leptin and thyroid hormones can normalize after roughly a week of refeeding following a month of energy restriction.
The most effective refeeds prioritize carbohydrates specifically. Carbs refill glycogen stores in your muscles, reduce cortisol, boost leptin, and give you more energy for training. A practical approach is to schedule one full refeed day per week (or two if you’re already lean). On that day, bring calories to maintenance by adding carbohydrates while keeping protein and fat roughly the same. This isn’t a cheat day. It’s a strategic tool.
Sleep Changes Everything
Sleep is the most underestimated factor in a cut. A 2010 study put this into stark numbers: people eating the same calorie deficit but sleeping only 5.5 hours per night lost 60% more muscle mass and 55% less fat mass compared to a group sleeping 8.5 hours. Same diet, same deficit, dramatically different body composition outcomes, all based on sleep alone.
During deep sleep, growth hormone peaks and protein synthesis ramps up. Cut that short, and your body shifts toward breaking down muscle and storing fat, precisely the opposite of what you want. Target 7 to 9 hours per night. If your schedule makes that impossible, even small improvements matter. Going from 5.5 to 7 hours will meaningfully change the ratio of fat to muscle you lose.
Creatine During a Cut
If you’re already taking creatine, keep taking it. If you’re not, a cut is a reasonable time to start. Creatine helps protect muscle fibers by drawing water into muscle cells, which supports cell volume and reduces damage during training. It also helps you maintain strength and power output, which matters when your energy availability is lower than normal.
The standard dose is 3 to 5 grams daily. You don’t need to load, and you don’t need to cycle off. One common concern: creatine causes water retention, which can temporarily mask fat loss on the scale. This is water held inside the muscle (not under the skin), so it actually makes your muscles look fuller. If you’re tracking progress, use the mirror, measurements, and strength logs alongside the scale rather than relying on weight alone.
Putting It All Together
A well-run cut typically lasts 8 to 16 weeks depending on how much fat you need to lose. Set your deficit at 500 to 750 calories below maintenance, keep protein at or above 1 gram per pound of body weight, train with heavy compound lifts 3 to 4 days per week, manage cardio intelligently, schedule weekly refeeds, and protect your sleep. Track your body weight as a weekly average rather than obsessing over daily fluctuations, since water weight from carb intake, sodium, and training can swing 2 to 4 pounds in either direction on any given day.
If you’re losing more than 1% of body weight per week consistently, or your strength is dropping significantly across multiple lifts, those are signals to eat a bit more or add an extra refeed. The slower and more patient you are with the process, the more muscle you’ll have when you reach your target body fat percentage.