What Should You Eat Before and After a Workout?

Eat a banana before you run? Protein shake within 30 minutes after? Fasted cardio or fuelled? The internet has turned what to eat before and after a workout into something resembling rocket science, when the reality is refreshingly straightforward. Good workout nutrition is mostly about timing basics, adequate protein and not overthinking it.

I’ve experimented with all of it over the years — fasted training, precise protein windows, elaborate pre-workout meals — and landed somewhere much simpler that works better. Here’s the no-nonsense version.

What to Eat Before and After a Workout

The goal of pre-workout eating is simple: have enough energy available without feeling heavy or nauseous. What that means depends on timing:

2–3 hours before: eat a proper meal

If your session is a few hours after eating, have a normal balanced meal: protein, carbs, some fat, vegetables. Porridge with yoghurt and berries. Chicken and rice. Eggs on toast. Nothing exotic — just real food in normal quantities. This is your main fuel tank.

30–60 minutes before: keep it small and carb-focused

Eating close to training? Go light, easily digestible, and carb-led with a little protein. Good options:

• A banana (the classic for a reason — portable, digestible, potassium-rich)
• Toast with honey or jam
• A small bowl of porridge or cereal
• A handful of dried fruit and a few nuts
• A yoghurt pouch or small smoothie

Avoid high-fat, high-fibre or very large meals right before training — fat and fibre slow digestion, which is exactly what you don’t want when blood is about to divert to your muscles. And skip anything new on race or match day: pre-workout is not the time for culinary experiments.

What about fasted training?

Training on empty (usually early morning) is fine for easy to moderate sessions under an hour — many people prefer it. But performance in hard sessions measurably suffers without fuel, and fasted training while trying to build muscle is counterproductive. My rule: easy morning run, fasted is fine; hard intervals or heavy lifting, eat something first. At minimum, have something with carbs within a couple of hours afterwards.

What to Eat After a Workout

Post-workout eating has two jobs: replenish energy (carbs) and repair muscle (protein). The infamous “30-minute anabolic window” has been largely debunked — total daily protein matters far more than precise timing. But eating within a couple of hours of training is still sensible practice, especially if you train again within 24 hours.

How much protein do you actually need?

Active people need more than the sedentary baseline: roughly 1.2–2g of protein per kilo of bodyweight daily, depending on training intensity and goals. For a 70kg person training regularly, that’s 85–140g — achievable through normal meals without living on chicken breasts. Spread it across 3–4 meals (your body uses protein more efficiently in 25–40g portions than in one giant dose).

Easy post-workout meals

• Quick (15 min): protein shake with milk and a banana; Greek yoghurt with granola and honey; beans on toast with cheese
• Proper meal: chicken stir-fry with rice; salmon with potatoes and veg; lentil dhal with rice; omelette with toast
• Vegetarian/vegan: tofu scramble, chickpea pasta, tempeh bowls, or a pea-protein smoothie — all complete with a little planning

Don’t fear carbs after training — they’re doing important work refilling muscle glycogen. The post-workout meal is genuinely the best time of day for a generous portion of rice, pasta or potatoes.

Hydration: The Forgotten Half of Fuelling

Most people under-drink around training. Have 400–600ml in the 2–3 hours before, sip during (don’t wait until you’re parched), and replace roughly 1.25–1.5 litres per kilo of weight lost afterwards — or simpler: drink until your urine is pale again. For sessions over 90 minutes or very sweaty conditions, add electrolytes (a sports drink or an electrolyte tablet, or simply salted food afterwards). Our full guide to how much water you actually need daily covers the baseline; training adds to it.

Supplements: what actually helps?

Creatine monohydrate is the most evidence-backed sports supplement in existence — cheap, safe for healthy adults, effective for strength and power. Everything else is marginal for most people. Protein powder is convenient but not magical; it’s just food in scoop form. Get the basics right first — and if you do supplement, time them properly with our guide to the best time to take vitamin supplements.

Special Cases

Training twice a day? Prioritise fast refuelling between sessions — carbs plus protein within the hour matters here. Endurance events? Practise your fuelling in training; race-day nutrition should hold zero surprises. Training with a cold? Scale back first, fuel second — see our guide to exercising with a cold. And if you’re using cold exposure for recovery, here’s the truth about the benefits of cold showers.

The NHS exercise guidance has solid general advice on fuelling active lifestyles.

Caffeine and Pre-Workout: What Actually Works

Caffeine is the most effective legal performance enhancer in existence — 3–6mg per kilo of bodyweight (roughly 200–400mg for most adults, or 2–3 cups of coffee) taken 30–60 minutes before training measurably improves endurance, strength and focus. It’s cheap, safe for healthy adults, and better evidenced than any proprietary pre-workout powder.

Those £40 pre-workout tubs? Mostly caffeine plus beta-alanine (the tingles — modest evidence for high-intensity efforts) plus creatine (better taken daily, timing irrelevant) plus a proprietary blend of fairy dust. A strong coffee 45 minutes before training delivers 90% of the benefit at 5% of the cost. Caveats: caffeine disrupts sleep for 6+ hours in sensitive people (no late-day training doses), it can cause jitters and gut issues at high doses, and regular users develop tolerance — cycle off periodically if you want to keep the edge.

What about fasted cardio for fat loss?

The persistent myth: fasted training burns more fat. The reality: it burns a slightly higher proportion of fat during the session, but total fat loss over weeks is identical to fed training — because what matters is total energy balance, not intra-workout fuel ratios. Train fed or fasted based on preference and performance, not fat-loss mythology. The one exception: some people genuinely feel nauseous training after eating, and for them fasted is the pragmatic choice — just keep the session moderate and refuel properly after.

The practical takeaway: eat a normal meal 2–3 hours before training or a small carb snack 30–60 minutes before; eat protein plus carbs within a couple of hours after; hit 1.2–2g protein per kilo daily; hydrate properly. Ignore the 30-minute panic, the magic powders and the fasted-training hype — consistency with basics beats perfection with details.