Protein in Weightlifting and Strength Sports: Eating for Maximum Strength
In weightlifting, powerlifting and other strength sports, the timing of protein is just as critical as the amount. Science-based dosages and a practical meal plan.
The Energy System in Strength Sports
Weightlifting and powerlifting rely on the phosphagen system (ATP-PCr). A single maximal lift lasts 1–5 seconds and barely uses the aerobic system at all. For muscle hypertrophy and strength development, however, a long-term nutrition strategy matters more than anything.
Protein: How Much, and When?
Daily protein target:
- Muscle-building phase: 1.8–2.2 g/kg/day
- Strength maintenance: 1.6–2.0 g/kg/day
- Weight-loss phase: 2.2–2.8 g/kg/day (increased to preserve muscle)
Protein per meal:
20–40 g of protein in a single meal is used most efficiently. For an 80 kg athlete, splitting 160 g of protein across 4 meals is ideal.
The Best Protein Sources
| Source | Protein/100g | Bioavailability |
|---|---|---|
| Eggs | 13 g | 100% (reference) |
| Whey powder | 75–90 g | 104% (PDCAAS) |
| Chicken breast | 31 g | 92% |
| Salmon | 25 g | 90% |
| Yogurt (strained) | 10 g | 85% |
| Lentils | 9 g | 52% |
Before and After Training
Before training (1–2 hours before):
- 30–50 g carbohydrate (for quick performance)
- 20–30 g protein
After training (within 30 min):
- 25–40 g protein (whey or egg-based)
- 50–80 g carbohydrate (glycogen replenishment)
Carbohydrates and Power Output
Most strength athletes cut carbohydrates more than they need to. Yet in intense training sessions, muscle glycogen is critically important:
- Heavy phase: 3–5 g/kg/day
- Maintenance phase: 2–3 g/kg/day
Creatine: A Must-Have Supplement in Strength Sports
Creatine is the only performance supplement with evidence level A for strength sports.
- Dose: 3–5 g/day (no loading phase needed)
- Effect: Gains in power and volume during repeated maximal efforts
- Form: Creatine monohydrate (micronized or standard makes no difference)
Is It Possible to Build Muscle Without a Calorie Surplus?
Beginners and athletes who are losing weight can gain muscle mass even in a calorie deficit ("body recomposition"). In experienced athletes, however, a slight calorie surplus (5–10%) is needed to build muscle.
This article is general information. Talk to a paediatrician or dietitian before deciding on a nutrition plan or supplements for your child.