Nutrient timing: when to eat carbohydrates, proteins and fats before and after training — a scientific guide

"Nutrient Timing" (Lithuanian: nutrient timing) — is a nutrition strategy according to which nutrients are consumed at a specific time in order to make maximum use of the body's physiological processes. Carbohydrates, proteins and fats consumed at the right time can significantly improve training results and accelerate recovery.
It is believed that proper nutrition timing can: increase protein synthesis in muscles, accelerate glycogen restoration and reduce muscle catabolism during training.
| Period | Carbohydrates | Protein | Fat | Liquids |
|---|---|---|---|---|
| 3-4 h before | 1-4 g/kg (complex) | 20-30 g | Minimal | 400-600 ml |
| 1-2 h before | 0.5-1 g/kg (easily digestible) | 10-20 g | Very little | 200-400 ml |
| 30 min before | 15-30 g (fast, if needed) | 5-10 g (BCAA/EAA) | Avoid | 150-250 ml |
| During training | 30-60 g/val. (>for 60 min. workouts) | BCAA 5-10 g (optional) | Avoid | 150-250 ml every 15-20 min. |
| Immediately after (0-30 min.) | 0.8-1.2 g/kg (fast) | 20-40 g (whey) | Avoid | 450-675 ml/kg of lost weight |
| 1-2 h after | Whole-food meal | 30-40 g | Healthy fats | Continue rehydration |
| For the rest of the day | According to daily needs | Every 3-4 h, 20-40 g | 20-35% of daily calories | Sufficient |
Emphasis — protein (20-40 g) after training. Carbohydrates according to body composition goals. Creatine (5 g) before or after training. Important: a protein dose every 3-4 hours throughout the day.
Emphasis — carbohydrates before and during training (if >60 min.). After training: a carbohydrate-to-protein ratio of 3:1 for glycogen restoration. Electrolytes during long distances.
Balanced approach: carbohydrates before training for energy, protein after training for recovery. Sports drink during training if it lasts >45 min
A light snack (banana, nuts) before training if you feel hungry. After training — a balanced meal. No special supplements or sports drinks are needed.
⚠️ Training on an empty stomach without a strategy. Although "fasted cardio" can have advantages, strength training without carbohydrates reduces performance.
⚠️ Too much fat before training. Fats slow gastric emptying and can cause discomfort during training.
⚠️ Skipping protein after training. The "golden window" after training (up to 2 h) is critical for muscle regeneration.
⚠️ Too few carbohydrates after endurance training. Glycogen stores must be restored within 2-4 h after training to be prepared for the next day.
| Time | Meal | Calories | Macronutrients |
|---|---|---|---|
| 07:30 | Breakfast: oatmeal + eggs + fruit | ~500 kcal | C:60g P:30g F:15g |
| 10:30 | Snack: Greek yogurt + nuts + berries | ~300 kcal | C:25g P:20g F:12g |
| 13:00 | Lunch: chicken + rice + vegetables | ~600 kcal | C:55g P:40g F:18g |
| 16:00 | Pre-workout: banana + peanut butter | ~250 kcal | C:35g P:8g F:9g |
| 17:00-18:30 | WORKOUT | - | - |
| 18:45 | Post-workout: whey protein + milk + banana | ~350 kcal | C:40g P:35g F:5g |
| 20:00 | Dinner: salmon + potatoes + broccoli | ~550 kcal | C:40g P:35g F:20g |
Does the "anabolic window" after a workout really exist?
Yes, but it is not as narrow as previously thought. Instead of a 30-minute "window", science now recommends a 2-4 hour period after a workout for protein and carbohydrate intake.
Do you need to eat at night if you train late in the evening?
If dinner was sufficient (30-40 g protein), there is no need to eat additionally at night. However, 20-30 g of casein protein before sleep may be beneficial for muscle growth.
What should you do if you train early in the morning?
A light snack (banana, toast with jam) 30 min. before a workout. After the workout — a complete breakfast with protein and carbohydrates.