Cutting Phase: How to Lose Fat Without Losing Muscle
A successful cut means losing fat while preserving (or even gaining) muscle mass. Calorie deficit, protein intake, training: here is the plan.
The Core Principle of Cutting
To lose fat, you must be in a calorie deficit: consuming fewer calories than you expend. But the goal of an intelligent cut is to preserve as much as possible the muscle mass built during the gaining phase.
These are sometimes conflicting objectives. Here's how to reconcile them.
Calculating the Right Deficit
Too aggressive a deficit = muscle catabolism, energy loss, slowed metabolism. Too moderate a deficit = very slow fat loss.
The optimal range: 300 to 500 kcal below your TDEE.
At this level:
- Expected weight loss: 0.3 to 0.5 kg/week
- Maximum muscle preservation
- Training performance maintained
For a more aggressive cut (−500 to −750 kcal), monitoring becomes more important and catabolism risk increases.
Protein: Your Top Priority
In a calorie deficit, protein needs increase. The body looks for alternative energy sources — including muscle.
Cutting target: 2.0 to 2.4 g of protein per kilogram of body weight.
This is the most important variable for preserving muscle mass during a deficit.
Training During a Cut
Continue strength training during your cut. This is the signal sent to the body to maintain muscle mass.
Adjustments to make:
- Slightly reduce total volume (increased fatigue in a deficit)
- Maintain intensities (weight on the bar)
- Reduce rest periods if needed to add some indirect cardio
Adding cardio is a tool — but the priority remains calories. A 300 kcal deficit through diet is simpler and more predictable than a 300 kcal deficit through cardio.
Managing Hunger
Hunger is inevitable in a deficit. Strategies to manage it:
- Food volume: green vegetables, low-calorie-density foods
- Protein at every meal: the satiating effect of protein is documented
- Low glycemic index foods: complex carbs for stable energy
- Hydration: confusing hunger and thirst is common
Monitoring and Adjustments
Weigh yourself every morning, fasted, after the bathroom. Average over the week. Ignore daily fluctuations (water, glycogen).
If loss is below 0.3 kg/week over 2 consecutive weeks → reduce intake by 100-150 kcal.
If you're losing more than 1 kg/week → increase intake by 200 kcal.
Optimal Cut Duration
12 to 16 weeks maximum for a productive cut. Beyond that, metabolism adapts too much, training suffers, and psychological resistance increases.
Plan a "reverse dieting" phase at the end: gradual increase of calories back toward maintenance.