Nutrition
Cutting Diet: How to Lose Fat Without Losing Muscle
Published October 20, 2026
A cutting diet is a planned calorie deficit that makes you lose about 0.5 to 1 percent of your body weight per week while keeping protein high (around 0.8 to 1 g per lb, 1.8 to 2.2 g/kg or more if you're lean) and keeping your strength training heavy. The goal is fat loss with as little muscle loss as possible.
Cutting is where many lifters undo months of work: crash diets, endless cardio and dropped weights. The research on physique athletes is clear on what preserves muscle. Here is the plan.
Step 1: Set the rate of loss
Helms and colleagues reviewed the evidence for natural bodybuilders preparing for competition and recommended losing 0.5 to 1 percent of body weight per week. Slower is safer for muscle, especially when you're already lean.
| Body weight | 0.5% per week | 1% per week |
|---|---|---|
| 140 lb / 64 kg | 0.7 lb / 0.3 kg | 1.4 lb / 0.64 kg |
| 170 lb / 77 kg | 0.85 lb / 0.39 kg | 1.7 lb / 0.77 kg |
| 200 lb / 91 kg | 1 lb / 0.45 kg | 2 lb / 0.91 kg |
| 230 lb / 104 kg | 1.15 lb / 0.52 kg | 2.3 lb / 1.04 kg |
Higher body fat? You can lose at the faster end. Already lean? Stay near 0.5 percent.
Step 2: Set calories
Start with a deficit of about 300 to 500 calories a day below maintenance (how to find maintenance: calorie deficit). After 2 to 3 weeks, check your average weekly loss against the table and adjust by 100 to 200 calories.
Don't expect a straight line. Water, salt, carbs and hormones move the scale day to day; trust the weekly average.
Step 3: Set macros
| Macro | Target | Why |
|---|---|---|
| Protein | 0.8-1.0 g/lb (1.8-2.2 g/kg); lean lifters often go higher | Protects muscle and keeps you full |
| Fat | 20-30% of calories (don't go much below 0.25 g/lb / 0.5 g/kg) | Hormonal health |
| Carbs | The rest | Fuels training quality |
Helms' review suggested protein of 2.3 to 3.1 g per kg of lean body mass for lean athletes in a deficit, which ends up around 1 g per lb of total body weight or slightly more for most people.
Step 4: Keep lifting heavy
The signal that tells your body to keep muscle is training that still challenges it. During a cut:
- Keep your main lifts in the 4 to 10 rep range at challenging loads.
- You can reduce total sets by a third if recovery suffers, but don't switch to "light weights, high reps to tone".
- Expect strength to hold or slip slightly. A big drop means the deficit is too steep.
Step 5: Add cardio last, not first
Walking is the best "cardio" on a cut: low fatigue, easy to recover from. Start by adding steps (see walking for weight loss). Add HIIT or longer cardio only if fat loss stalls and food can't reasonably go lower.
Sample day: 180 lb (82 kg) male, ~2,100 kcal, 180 g protein
| Meal | Food | Protein |
|---|---|---|
| Breakfast | Egg-white omelet (1 cup) + 1 whole egg, spinach, 1 slice toast | ~35 g |
| Lunch | 6 oz (170 g) chicken, 1 cup rice, big salad | ~50 g |
| Snack | 1.5 cups Greek yogurt + berries | ~35 g |
| Dinner | 6 oz (170 g) white fish, potatoes, vegetables | ~40 g |
| Evening | 1 scoop whey in water | ~22 g |
Hunger management
- High-volume foods: vegetables, potatoes, berries, soups.
- Protein at every meal.
- Diet soda or sparkling water if it helps.
- Sleep 7+ hours: short sleep increases appetite.
- Plan a maintenance week every 8 to 12 weeks for long cuts.
When to stop cutting
- You've reached your goal.
- Strength is dropping week after week.
- Sleep, mood or (for women) cycles are disrupted. Stop and see a doctor if periods stop.
Then increase calories gradually to maintenance over 2 to 3 weeks.
Who should be careful
Cutting is not for anyone with a history of eating disorders, pregnant or breastfeeding women, or teenagers. If you have a medical condition or take medication (especially for diabetes), involve your doctor.
Related guides
- Why spot-reduction doesn't work: how to lose belly fat
- Bulking afterwards: how to bulk
- Protein in detail: how much protein per day
If you want the training side structured for 12 weeks, including progression that holds up during a deficit, see our programme.
Frequently asked questions
How long should a cut last?
Most cuts last 8 to 16 weeks. Longer cuts work too, but planned maintenance breaks of 1 to 2 weeks every 8 to 12 weeks make them easier to sustain. Very lean physique goals take longer and get harder near the end.
Should I do cardio during a cut?
Yes, but prioritize low-fatigue activity like walking first. Daily steps add a lot of calorie burn without interfering with strength training. Add HIIT or longer cardio sessions only if needed.
Will I lose muscle on a cut?
Some muscle loss is possible, especially in very lean people with aggressive deficits. You can minimize it with a moderate rate of loss, high protein, heavy strength training and enough sleep. Beginners and people with more body fat often keep or even gain muscle during a cut.
What should I eat on a cutting diet?
Lean proteins (chicken, fish, eggs, Greek yogurt, tofu, legumes), lots of vegetables and fruit, whole grains and potatoes for carbohydrates, and moderate fats (olive oil, nuts, avocado). Plan meals around protein and fiber; they keep you full.
Is intermittent fasting good for cutting?
It can help if eating in a shorter window makes your deficit easier to stick to. It doesn't burn more fat than the same calories spread over the day. Make sure you still hit your protein target, which can be harder with fewer meals.
How do I know if my cut is working?
Track the weekly average of daily weigh-ins, your waist measurement every 2 weeks, and photos every 4 weeks. If none has moved in 2 to 3 weeks of consistent eating, reduce calories by 100 to 200 or add steps.
Studies cited
- Helms ER, Aragon AA, Fitschen PJ (2014). Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. Journal of the International Society of Sports Nutrition. doi:10.1186/1550-2783-11-20
- Hall KD et al. (2011). Quantification of the effect of energy imbalance on bodyweight. The Lancet. doi:10.1016/S0140-6736(11)60812-X