How to Cut: Losing Fat Without Losing Muscle (The Complete Guide)

A successful cut requires three things: a sustained calorie deficit, sufficient protein to preserve muscle, and continued resistance training to give the body a reason to hold on to muscle mass. Get all three right and you'll lose fat while looking better as existing muscle becomes more visible. Get them wrong and you'll lose both fat and muscle — ending up lighter but not leaner.

Setting Up Your Calorie Deficit

• •Calculate your maintenance calories first: Use a TDEE calculator (Total Daily Energy Expenditure) or track your current food intake and bodyweight for 2 weeks to establish your true maintenance. YourFit's nutrition tracker lets you log meals and see your daily calorie intake against your goal — essential for accurate deficit management
• •Choose a deficit size: 300–500 calories below maintenance is the standard recommendation for a moderate cut. This produces 0.5–1 lb of fat loss per week, which is the rate at which most research shows the best muscle retention
• •Aggressive deficits (750–1,000+ calories below maintenance) produce faster fat loss but significantly more muscle loss — particularly problematic for people who've trained hard to build muscle. The faster you lose weight, the more of that weight comes from muscle
• •Adjust based on results: If you're losing more than 1% of bodyweight per week, increase calories slightly. If you're not losing at all after 3 weeks, reduce calories by 100–200. Small, evidence-based adjustments beat arbitrary large changes

Protein: The Most Important Variable for Muscle Retention

• •Target: 0.8–1 gram of protein per pound of bodyweight (1.8–2.2 g/kg) during a cut — higher than during maintenance or a bulk. This is well-supported by research
• •Higher protein preserves muscle through three mechanisms: it provides the substrate for muscle protein synthesis (so the body doesn't break down muscle for amino acids), it's the most satiating macronutrient (reducing hunger in a deficit), and it has the highest thermic effect (roughly 25–30% of protein calories are burned during digestion)
• •Distribute protein evenly across 3–5 meals. Research consistently shows that spreading protein intake (rather than consuming most of it in one meal) produces better muscle protein synthesis outcomes
• •Track your protein every day in YourFit's nutrition tracker. During a cut, protein intake is the single most controllable variable that determines how much muscle you retain

What to Do With Carbohydrates and Fats

• •Fats: Don't go below 0.3 g/lb (0.7 g/kg) of bodyweight. Fat is required for hormonal function — particularly testosterone production, which is already somewhat compromised in a calorie deficit. Going too low on fat tanks recovery and hormonal health
• •Carbohydrates: Fill remaining calories with carbohydrates. Carbs fuel training performance — reducing carbs too aggressively compromises training quality, which increases muscle loss risk. Keep carbs sufficient to train hard
• •Prioritize carbs around training: Carbohydrates consumed before and after training are preferentially directed toward muscle glycogen replenishment rather than fat storage — particularly relevant when in a deficit

Training During a Cut

• •Maintain resistance training with the same intensity: This is the signal that tells the body to preserve muscle. The same weights, the same exercises, the same proximity to failure. If you reduce intensity significantly during a cut, you lose the stimulus for muscle retention
• •Reduce volume if recovery is compromised: You may need to drop from 20 sets per muscle group per week to 12–15 sets. The intensity (load relative to max) should stay the same — just fewer total sets
• •Add or maintain cardio: Additional cardio creates more of a deficit without requiring further food reduction. Prefer lower-intensity cardio (Zone 2) over excessive HIIT during a cut — HIIT adds significant recovery demand at a time when recovery capacity is already reduced by the calorie deficit

How Long Should a Cut Last

• •A typical cut lasts 8–16 weeks. Longer than 16 weeks in a significant deficit increases metabolic adaptation (the body reducing energy expenditure) and hormonal disruption — diminishing returns set in
• •Diet breaks: Taking 1–2 weeks at maintenance calories every 6–8 weeks during a long cut resets leptin levels, improves hormonal markers, and has been shown in research to result in similar fat loss with significantly better muscle retention compared to continuous cutting
• •Know when to stop: Cuts should end before you've lost significant strength, feel chronically fatigued, or are dropping below 10% (men) or 18% (women) body fat — these ranges are associated with hormonal and health consequences from extreme leanness

The Bottom Line

A successful cut is: maintenance calories minus 300–500 kcal, 0.8–1 g protein per pound of bodyweight, continued resistance training at the same intensity, and enough carbohydrates to fuel training performance. Log your food and training in YourFit throughout your cut — seeing your calorie intake, protein target, and workout progression tracked daily is what turns a vague goal of 'getting leaner' into a managed, measurable process with predictable outcomes.