Macronutrients (Macros)
Macronutrients (Macros)
Definition
Macronutrients (or "macros") are the 3 main categories of nutrients your body consumes in large quantities to produce energy and function.
| Macro | kcal/g | Role |
|---|---|---|
| Protein | 4 | Building & repair |
| Carbs | 4 | Immediate energy |
| Fats | 9 | Hormones & long-term energy |
💡 Alcohol is not an essential macro but provides 7 kcal/g.
Why macros matter
Counting only calories is limited. Two diets at 2000 kcal can produce radically different results:
- 2000 kcal with 200 g protein: favors muscle gain
- 2000 kcal with 50 g protein: favors muscle loss
- 2000 kcal mostly simple carbs: rapid hunger
- 2000 kcal balanced: stable satiety, optimal performance
How to split your macros
Step 1: Calculate your daily calories (TDEE)
Step 2: Set protein (priority)
- 1.6 - 2 g/kg in maintenance and bulking
- 2 - 2.5 g/kg in cutting
Step 3: Split the rest
- Fats: 0.8 - 1.2 g/kg × 9 = fat calories
- Carbs: remaining calories / 4 = carb grams
Full example
80 kg lifter, TDEE 2800 kcal, bulking:
| Macro | Quantity | Calories | % |
|---|---|---|---|
| Protein | 160 g | 640 kcal | 21% |
| Carbs | 430 g | 1720 kcal | 56% |
| Fats | 80 g | 720 kcal | 23% |
| Total | — | 3080 kcal | 100% |
Splits by goal
| Goal | Prot | Carbs | Fats |
|---|---|---|---|
| Moderate cut | 30-40% | 30-40% | 20-30% |
| Balanced maintenance | 25-30% | 40-50% | 25-30% |
| Bulking | 20-25% | 50-60% | 20-25% |
| Endurance | 15-20% | 55-65% | 20-25% |
| Ketogenic | 20-25% | 5-10% | 65-75% |
Tracking tools
- 📱 MyFitnessPal: market reference
- 📱 Yazio: modern interface, free
- 📱 Cronometer: very precise
- ⚖️ Kitchen scale: essential at first
Common mistakes
- ❌ Underestimating protein (staying below 1.6 g/kg)
- ❌ Cutting fats too drastically
- ❌ Believing "less carbs = better"
- ❌ Tracking only calories without macros
- ❌ Ignoring fiber (15-30 g/day)
Key takeaways
Mastering your macros means mastering your physical transformation. Three rules: protein priority (1.6-2 g/kg), minimum fats (0.8 g/kg), carbs based on goals.
Related terms
Maintenance is the calorie level at which your weight remains stable. The neutral baseline for any nutritional strategy.
Mass gain (or bulk) is a controlled caloric surplus phase aimed at building muscle. Discover how to do it without gaining excess fat.
Meal timing is the strategic distribution of your meals around training and through the day to optimize performance and recovery.
A mesocycle is a 4-8 week training block with a specific objective (hypertrophy, strength, peak, deload). The cornerstone of periodization.
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