Last updated: April 2026
Pre & Post Workout Nutrition: What to Eat and When
What you eat around training affects performance, recovery, and muscle gain — but most of the "rules" are exaggerated. Here is what the evidence actually says about pre-workout meals, post-workout protein, carbohydrate timing, and the anabolic window.
2–3h
before training
Pre-workout meal
25–40g
within 3h
Post-workout protein
3–4h
not 30 min
Anabolic window
30–40g
casein ideal
Pre-sleep protein
Pre-Workout Nutrition
The goal of a pre-workout meal is twofold: fuel your training session and prime muscle protein synthesis. Both are best achieved by eating a balanced meal 2–3 hours before training. If time is short, a smaller, easily digestible option 60–90 minutes beforehand works well.
| Timing | Protein | Carbs | Fat |
|---|---|---|---|
| 2–3 hours before | 20–40g | 40–80g | Moderate |
| 60–90 minutes before | 15–25g | 20–40g | Low |
| 30–45 minutes before | 15–20g | 20–30g (fast) | Minimal |
| Fasted training | — | — | — |
Best pre-workout meals (2–3h before)
- Chicken + rice + vegetables
- Salmon + sweet potato
- Greek yoghurt + oats + banana
- Eggs + wholegrain toast + fruit
Best pre-workout snacks (< 90 min before)
- Whey protein shake + banana
- Rice cakes + peanut butter
- Banana + protein bar
- Cottage cheese + berries
Post-Workout Nutrition
After training, muscle protein synthesis is elevated for 24–48 hours. Consuming 25–40g of protein within 3–4 hours of training maximally stimulates this response. Carbohydrates post-workout restore muscle glycogen — this matters most if you train twice daily or on back-to-back days. For single daily sessions, glycogen replenishment throughout the rest of the day is sufficient.
The Anabolic Window: What It Is and What It Isn't
The "anabolic window" concept emerged in the 1990s with the idea that protein must be consumed within 30–60 minutes of training or the muscle-building opportunity is lost. Modern research has comprehensively disproved this. A 2013 meta-analysis by Schoenfeld et al. found that when total daily protein was controlled, protein timing had minimal additional effect on muscle gain. The relevant window is 3–4 hours — and if you ate protein 2 hours before training, your post-workout window extends even further.
Best post-workout meals
- Chicken breast + rice + broccoli
- Tuna + pasta + vegetables
- Salmon + sweet potato + salad
- Lean beef stir-fry + rice
Best post-workout shakes & snacks
- Whey protein shake (25–40g protein)
- Whey + banana + oats smoothie
- Greek yoghurt + granola + fruit
- Cottage cheese + apple
What Matters More Than Timing
The fitness industry over-indexes on nutrient timing. The evidence is clear: total daily intake outweighs timing effects by a large margin. Here is the hierarchy of importance:
Total daily protein
1.6–2.2g/kg. The single most important variable for muscle gain and recovery. Gets you 80% of available results.
Total daily calories
Surplus for muscle gain, deficit for fat loss, maintenance for recomp. Drives the overall outcome direction.
Protein distribution across meals
Spreading protein across 3–5 meals maximises MPS signals throughout the day. Each meal should hit ~0.4g/kg minimum.
Carbohydrate availability for training
Adequate glycogen pre-workout supports performance — particularly for high-volume, high-intensity sessions.
Peri-workout protein timing
25–40g protein within 3–4h of training is beneficial, but the effect size is small if total daily intake is adequate.
Pre-Sleep Protein: The Overlooked Window
The overnight fast (typically 7–9 hours) is the longest period of the day without amino acid availability. Research by Trommelen and van Loon has shown that consuming 30–40g of casein protein before bed increases overnight muscle protein synthesis by approximately 22% compared to a placebo, and improves morning muscle protein balance.
Best pre-sleep protein options
Frequently Asked Questions
How soon before a workout should I eat?
A full meal 2–3 hours before training is ideal — it allows digestion to complete and delivers amino acids and glycogen to muscles at the right time. If eating closer to training (within 60–90 minutes), choose something smaller and easier to digest: a whey protein shake, a banana with protein, or Greek yoghurt. Exercising on a very full stomach impairs performance and causes discomfort. Fasted training (no pre-workout meal) is acceptable for most people but may reduce performance slightly, particularly in high-intensity sessions.
How much protein should I eat after a workout?
25–40g of protein post-workout is the evidence-based range for maximally stimulating muscle protein synthesis in most adults. Larger individuals or those over 40 may benefit from slightly higher amounts (40–50g) as the muscle protein synthesis response per gram of protein decreases with age. The source matters less than the dose — whey is optimal but any complete protein source consumed within 3–4 hours of training will achieve the same result.
Is the post-workout anabolic window real?
Yes, but it is far wider than the '30-minute window' that was popularised in the 1990s. Meta-analyses on protein timing consistently show that the relevant window for capturing post-workout muscle protein synthesis is approximately 3–4 hours after training. If you ate a protein-rich meal 2 hours before training, you likely do not need to rush to consume protein immediately after. The practical take: aim for a 25–40g protein meal within 1–3 hours post-workout.
Should I eat carbs before or after a workout?
Carbohydrates before training fuel performance — particularly for high-intensity resistance training and cardio. 30–60g of moderate-to-high GI carbs 1–2 hours pre-workout helps maintain training intensity. Post-workout carbohydrates replenish muscle glycogen, especially important if you train twice a day or on consecutive days. For single daily sessions, glycogen replenishment over the rest of the day is sufficient — the timing of post-workout carbs matters less than commonly believed.
Do I need protein before bed after training?
A pre-sleep protein intake of 30–40g casein (or any slow-digesting protein) significantly improves overnight muscle protein synthesis. This is particularly valuable on training days, where muscle protein breakdown is elevated overnight. Research by Res et al. (2012) showed a 22% increase in overnight MPS with 40g casein before sleep. Cottage cheese, Greek yoghurt, or a casein shake are practical options.
Is pre-workout food necessary for fat loss?
No — fasted training is a valid approach for fat loss and does not meaningfully compromise muscle retention if daily protein intake is adequate. The primary goal during fat loss is maintaining a caloric deficit while preserving lean mass. Training fasted slightly increases fat oxidation during the session, but total 24-hour fat balance is what determines fat loss outcomes. If you perform better with food, eat beforehand — if not, fasted training is fine.