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Are you fuelling your workouts properly?

author

Rachel White

published

12/07/2026

The world of sports nutrition can seem complex: do I need to take a protein shake immediately after my gym session? Should I be taking supplements? And do I actually need carbohydrates?

We asked sports specialist dietitian Rachel White, who works with everyone from people starting out with exercise to elite athletes, to cut through the noise with some practical advice.

Are you fuelling your workouts properly?

Why is nutrition important when I exercise?

Nutrition provides the fuel your body needs for exercise. Without the right fuel, workouts feel harder and you're less likely to see the results you're working for.

Think of your body like a phone battery. Exercise drains it faster - like streaming a film or making a video call - so you need to keep it charged with the right nutrients and hydration. The more you exercise, the more fuel you need to keep that battery full.

Do I need to be eating differently if I am exercising regularly?

The short answer is yes! Fuelling around your workouts is really important. How you do this will vary depending on what type of exercise you are doing.

For strength based exercise – focusing on recovery post exercise will help you see the best progress and to minimise those DOMS (delayed onset muscle soreness – aka sore muscles!).

For endurance exercise – carbohydrate is going to be your best friend. A high carbohydrate snack before exercise is key if you have not eaten in the past 2 hours. Think something simple: a slice of toast or a crumpet with spread, a cereal bar and fruit. Then make sure you get that recovery meal or snack in afterwards.

On the days you are exercising you may need to eat more than usual, and this is something I actively encourage. The biggest mistake I see when supporting clients is that they are underfuelling their exercise. In the sports nutrition world we call it 'fuel for the work required'. I like to explain this concept using a weather analogy. In the UK we check the weather religiously, because depending on the forecast we need to change what we wear: a coat, an umbrella, or popping your shorts on. If you wore the same outfit every day, it is unlikely to be appropriate all week long.

You can apply this strategy to how you fuel your workouts. If you eat the exact same thing each day, you are not adapting to your exercise routine and energy needs. Meaning that some days you will not be getting it right and you’ll in fact be wearing shorts and t-shirt when it is snowing!

Guidelines for the general population suggest that women need 2000kcal and men 2500kcal per day, but this isn't applicable to active individuals. Therefore there is a high chance that you will need to exceed these depending on your activity. This can be through intentionally snacking or just adding a few extra spoons of food to your meals.

How can I optimise my recovery?

Once you've completed a workout or activity, the right nutrition can help your body to recovery as fast as possible.

The easiest way to remember how to recover like a pro is the 4 R’s:

  • Repair: your muscles need to repair, and consuming enough protein will help speed this process up.
  • Replenish: refill your energy stores (known as glycogen) with carbohydrate.
  • Rehydrate: drink plenty to replace what you lost in sweat during your exercise.
  • Rest: give your body time to recover by prioritising sleep and downtime.
  • A meal eaten within a couple of hours of exercise works great, however if there is likely to be longer gap, then an extra recovery snack is beneficial. This should contain protein – to help re-build those muscles, alongside carbohydrate to refill the energy stores that you utilised during that exercise.

    Here are some great options for a recovery snack:

    • Greek yoghurt + fruit or granola
    • Chocolate milk
    • Smoothie (made with milk/yoghurt/protein powder)
    • Rice cakes and hummus
    • Falafel wrap

    Is protein the most important nutrient to consider?

    If you are regularly exercising it's true that you are likely to need more protein. In the UK the recommendation for the general population is 0.75g/kg body weight (for someone weighing 70kg = 53g protein per day).

    If you are doing regular strength exercise this is likely to increase to 1.6-2g/kg body weight (for someone weighing 70kg = 112-140g per day).

    For individuals doing more endurance exercise, then this is 1.2-1.6g/kg body weight (for someone weighing 70kg = 84-112g)

    So yes, protein is important – the priority is to be hitting your requirements consistently. Once you have done this, then timing becomes more important. However more doesn’t necessarily mean better, and there's no benefit to exceeding these amounts.

    If you want to learn more about protein, this article from Laura can help.

    Why am I feeling hungry all the time?

    This can be a sign that you are not eating enough, especially if you have recently increased your exercise levels. So remember to fuel around your workouts as discussed earlier, and try adding an extra spoonful or two of food at your meals.

    Second, check if you're getting enough protein and fibre in your diet. Both protein and fibre help us feel fuller for longer – so do a little audit of your intake and see if there are any gaps.

    I'm female, do I need to do anything differently?

    Unfortunately the research is really limited in sports nutrition for female athletes. We do need more specific research, however what we do know is that avoiding fasted training is particularly important for women. Fasted training is not eating for several hours prior to your workout, for example going to the gym after you wake up in the morning and not eating before.

    I know this can be difficult as you often do not want to eat first thing in the morning, but it is really important to have a small snack such as a biscuit or cracker. If that feels too much, then a glass of fruit juice can be a great fit.

    Do I need to be taking sports supplements?

    Whilst a lot of companies will promote the idea that we must take this or that supplement, I want you to take a step back and review how important it really is. In sports nutrition the most common supplements are protein powders, creatine and electrolyte tablets. So let's work through these three, and when they might be beneficial:

    1. Protein powder: This is only likely to be needed if you cannot consistently meet your daily requirements from diet alone. A protein shake can be really convenient, especially if you are on the go. But do not feel that you have to start taking protein shakes just because you are exercising.
    2. Creatine: There is an ever growing body of research which supports to use of creatine. It can help increase muscle strength (alongside exercise), help improve recovery after exercise, as well as potential benefits with memory and decision making. Making it a great all rounder to consider. It is important to be aware it may lead to a slight increase in weight due to water retention. Take it alongside a source of carbohydrate for the best absorption.
    3. Electrolyte supplements: These often come in dissolvable tablets or sachets. Whilst everyone has gone a little electrolyte crazy at the moment, they are probably only necessary in very hot weather and for prolonged exercise. Taking electrolytes everyday may potentially lead to high salt intake which can have a negative effect on your general health and raise blood pressure.

    Common mistakes I see a lot

    Supplements: Feeling that you have to take supplements. In sports nutrition we take the approach of 'food first but not food only'. So think: can I get this from food? If not, then consider the best approach from supplements.

    Fuelling longer exercise: If you are running or cycling for longer than one hour, make sure you take some nutrition during the exercise. It doesn't matter if it's just an 'easy' run, you still need to top up that battery with carbohydrates. Around 30-60g an hour is generally advised for exercise of 1-3 hours.

    Fasted workouts for women: As mentioned before, try to fuel intentionally around your workouts. You might be surprised that they feel a little easier, and you may make faster progress or recover better as a result!

    Avoiding carbohydrates: Carbohydrates are the body's main energy source. Nourish your body and keep that battery topped up. Make sure there is a source of carbohydrate with each meal, for example bread, pasta, potatoes, fruit, rice and oats. Failing to do this can lead to zapped energy levels, poorer performance and delayed recovery.

    Take home message

    Nutrition is personalised, and not everyone's nutritional needs look the same. Your nutrition needs to be flexible around your workouts. This may mean adding a pre- or post-workout snack to help you perform or recover at your best. That doesn't mean it has to be complicated: get the basics and balance right and you are most of the way there!

    If you are unsure what you should be eating, or if you are optimally fuelling your workouts then support from a sports dietitian is a worthwhile investment.

    By Rachel White

    Sports Specialist Dietitian

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