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Guide To Pre-Workout | What Is It? When To Take it?

Guide To Pre-Workout | What Is It? When To Take it?
World’s leading online sports nutrition brand2 months ago
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Do you fancy maximising your workout before you even walk through the door? We thought so. There are supplements made to set you up with the energy to hit a great workout and aid your recovery, as well as a tonne of other benefits. If you don't know about pre-workout, it's time to get to know your new secret weapon. This article will delve into what this supplement does, how it works, it's benefits and when exactly you should be taking it.

If you’re looking to increase your performance during your workouts and see greater changes to your body over time, using pre-workout supplements could help to give you the extra boost you need.

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What is pre-workout?

A pre-workout is a way to boost your energy and optimise performance during your workout. It typically comes as a powdered supplement that you mix with water. They generally contain combinations of ingredients, making them an easy alternative to taking several different supplements before hitting the gym.

What does pre-workout do?

Although each brand chooses their own ingredients, pre-workout shakes are often made up of caffeine, vitamins, creatine, and other various ingredients to enhance energy and strength.1

The benefit is an increase in performance during anaerobic exercise (like weightlifting) or endurance exercise (like cardio) by giving an energy boost and delaying fatigue.2 Even though the ingredients in different shakes might vary, they all aim to maximise the results of your workout.

How does pre-workout work?

Pre-workouts work by providing you with different nutrients that will improve your exercise performance. This can be through ingredients such as caffeine which can improve your time to fatigue during a workout. Other ingredients such as beta alanine and vitamins can also be added to improve your performance by helping you to feel energised and well-fuelled through your workout.

For this reason, a pre-workout is usually taken before a workout to boost your performance and give you a hit of energy.

Check out some snacks to provide you with an extra boost:

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What are the benefits of pre-workout?

If you’re new to working out and need an energy boost, or have been training for a while and feel like your progress has plateaued, then this shake might be beneficial for you. The benefits of pre-workouts are related to increasing energy, performance and strength.

Studies have shown short term increases in lean body mass and lower body strength when taking a pre-workout supplement consistently.2 Often, the combination of ingredients provides greater performance benefits than taking one supplement on its own.2


Caffeine is one of the most common ingredients found in pre-workout shakes, which has been shown to provide benefits such as improvements in muscle power and endurance, without increasing how hard the activity feels (the rate of perceived exertion).3,4 In other words, you’re able to accomplish more in your workout without feeling like you’re pushing yourself harder.

More benefits of caffeine:

Improved performance

One of the main benefits of taking a pre-workout supplement is improved performance from the ability to train harder and longer. Ingredients typically found in pre-workouts can help increase endurance and mental focus.

Boost in concentration

Caffeine is a mental stimulant with studies showing improved mental alertness following consumption. This can make a pre-workout particularly good for skill-based exercises, like technique-focused weightlifting sessions.

Relieves muscular pain

Caffeine is one of the main ingredients in many pain relievers. It’s been shown that caffeine can help alleviate post-workout pain and muscle soreness, meaning you’ll be able to hit the gym just as hard each day.11 This makes caffeine an ideal supplement to take pre workout.

Improves speed and endurance

Consuming pre workout caffeine before a workout can improve both your speed and stamina while making your workout seem easier and less strenuous.11,12

Speeds up heart rate

Since caffeine has an effect on your central nervous system, it could help you by increasing your heart rate and breathing rate.12 This means you can supply your muscles with more oxygen, allowing them to aerobically respire more successfully, increasing output.

Replenishes glycogen stores

Caffeine, when consumed with carbohydrates, has been shown to replenish muscle glycogen stores quickly after exercise.13

Is pre-workout good for you?

Some pre-workouts include vitamin B1 — which can help with cardiovascular function — and vitamin B12 — which can help with energy production.

But pre-workout also typically contains high amounts of caffeine, which can be dangerous in large quantities, so do not exceed the recommended dose.

Caffeine and stim free

Caffeine is recommended for having as a pre-workout, as it can provide a brilliant energy boost to help push you through your workout. A lot of pre-workouts include contains caffeine alongside other typical pre-workout ingredients, like beta-alanine, B-vitamins, or taurine.

However, there are also stimulant-free pre-workouts, designed using research-backed ingredients to give you the boost you need, without any caffeine.

What are the side effects of pre-workout?

Potential side effects depend on the ingredients in your specific supplement. Typically, caffeine and other energy-boosting compounds could increase your heart rate and blood pressure temporarily, but there’s been no evidence of widespread negative effects.5

Other side effects may include:


Caffeine has been shown to lead to dehydration, as it can have a slight diuretic effect. Therefore, if you’re consuming reasonably high levels of caffeine throughout the day, it’s recommended to increase your water intake to reduce the risk of dehydration. If you take pre-workout caffeine, then you should definitely ensure you keep drinking water throughout your workout.

Find out how much water you should actually be drinking here:


Since caffeine is a powerful stimulant, it’s fairly evident that it could present some adverse side effects when it comes to the quality of sleep. Depending on the individual, the results can vary. You should therefore be careful when taking pre-workout caffeine in the evening.

Some may not be hindered by caffeine when it comes to sleeping, but for others, it could be an issue. You should moderate your intake if you recognise that it affects you negatively and do not drink caffeinated drinks in the evening or before you go to bed.

If you struggle to sleep anyway, check out these supplements:


Caffeine can be very addictive – withdrawal from caffeine can present side effects such as headaches, anxiety and cravings. These can be prevented by gradually weaning yourself off, lowering your dosage.

Key ingredients in pre-workout supplements: exploring their effects

What is in pre-workout?

Vitamin B

Another category of the common ingredients found in pre-workouts are B vitamins like niacin and vitamin B12. These vitamins play key roles in metabolism and energy.7 They may also contain creatine, a common ergogenic (building) aid, which increases performance in short-duration, high intensity exercise, and also helps with lean gains when taken consistently.8

Beta Alanine and L-Citrulline

Some pre-workout formulas may also contain beta alanine and L-citrulline, which have both been shown to improve energy in endurance-related exercise.9,10 You’ll find all of these key ingredients in THE Pre-Workout, benefiting both short-duration (strength training) and longer-duration (cardio based) activities.


Branched chain amino acids, or BCAAs, are often taken before a workout and are often part of your all-in-one pre-workout supplement. They're usually included as either a single ingredient or as individual amino acids. As building blocks of muscle tissue, amino acids may help to prevent muscle damage and muscle breakdown, as well as improve muscle rebuilding.5 They might also help prevent fatigue which impacts performance.5

Find out more about BCAAs here:

What Are BCAAs & Their Benefits?

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Some pre-workout mixes contain carbohydrates (sugar) to top off your available energy stores, while others are sugar and calorie-free. You might decide whether or not you need carbs based on whether you’ve eaten a meal recently or the type of workout you’re planning.

If you’re planning an endurance cardio workout (like running or cycling), the extra carbs can be useful, but if you’re planning on just lifting (anaerobic activity), you probably don’t need the sugar.


During explosive exercise, the body uses creatine to make energy. To perform at a high level, your muscles need a good supply of energy so that you can perform harder for longer periods of time.

Being able to take your workout one step further every time can have a compounding effect, meaning reaching your aesthetic and strength goals sooner. These changes have the potential to improve your performance and keep making progress towards your fitness goals.

The lowdown on creatine:


This is an amino acid, one of the molecules that make up protein. Naturally found in food sources, they can help to repair new muscle. When you work out, your muscles suffer from tiny tears, that when repaired make them stronger. Make sure your stores are topped up ready for a tough workout.


When you’re working out, your body is working hard to pump enough oxygen to your muscles to make energy. Vasodilators cause the blood vessels to widen, which means an increased blood flow to the muscles, providing them with more of the nutrients they need to keep you moving. The longer it takes for you to tire, the harder you can push your workout and the greater changes you can make.

Overall, pre-workouts allow you to repeatedly increase your power, strength, and stamina over time. This can lead to more significant changes in lean body mass, loss of fat mass, and a faster metabolism.2


Caffeine is a potent Central Nervous System (CNS) stimulant and has been found to increase mental alertness, cognitive processing and decision making, particularly when in a state of fatigue or extreme stress.

From stim-free to loaded up on caffeine, it’s important that you pick the pre-workout that suits you.

What are the different types of pre workout?

Origin Pre-Workout

Our newest pre-workout and the ultimate hard-hitting formula. Packed with 300mg of caffeine, it’ll have you reaching for new PBs, and achieving them. Plus, citrulline malate and beta alanine to help you elevate your training and unlock your potential.

Origin Pre-Workout Stim-Free

No-nonsense and entirely stimulant-free. Perfect for when you’re aiming to make the most of those late-night sessions, but don’t want to be kept awake all night.

There's no caffeine, but this won’t get in the way. With plenty of research-backed ingredients, you can still get the most out of every session.

Origin Pre-Workout Dry Scoop

Arguably our most innovative pre-workout to date. Dry scoop. While we don’t ordinarily advocate for dry scooping pre-workout, this is different. This product has been specifically designed with dry scooping in mind. So it’s completely safe to do so.

And it’s still packed with all the good stuff – citrulline malate, beta-alanine, and 147mg of caffeine. Convenient, powerful, and pretty tasty.

Pre-Workout Shot

Equally as convenient as Origin Dry Scoop, enter the pre-workout shot. No need for a shaker full of liquid, hit your pre workout needs with a shot containing all you need – 200mg of caffeine, vitamin B12, beta-alanine and l-citrulline.

Pre-Workout Gummies

The perfect option for when you could do with a boost – pre-workout gummies. Get mentally and physically prepared for each and every workout with up to four gummies.

With 5mg of caffeine per gummy, it’s a low-caffeine option, still combined with other vital ingredients including L-citrulline, taurine and B vitamins.

THE Pre-Workout

Fuel your fitness and fight fatigue with THE Pre-Workout. Loaded with 200mg of caffeine to help you power through your workout and help you exercise for longer. Plus, B vitamins, and L-glutamine to help you support your goals.

Pre-Workout Gel

For consumption straight from the sachet, try the Pre-Workout Gel. Our unique blend contains optimal measures of caffeine, citrulline malate, taurine and beta alanine to fuel you through weightlifting or long-distance running.

When to take pre-workout

Because caffeine is a staple ingredient and it takes effect in about 30 minutes, the ideal time for you to take your pre-workout supplement is 30-60 minutes before your workout.5 Caffeine has half-life of between 3 and 7 hours, meaning after this time, half the caffeine can still be in your system.6 This can vary between individuals with some feeling the effects for longer than others. Therefore, caution should be taken when consuming a shake like this in the hours before you go to bed, especially for those who are more sensitive to caffeine.

Having your shake 30-60 minutes before your session gives enough time for the supplement to get into your bloodstream and give you the benefits you’re looking for. THE Pre-Workout is designed to be taken dissolved in water 30 minutes before your workout, which also helps you to stay hydrated.

Although caffeine impacts you immediately, some ingredients like creatine and beta-alanine need time to build up in your body, and are most effective when taken consistently to maintain muscle stores.5 For this reason, regularly supplementing with a pre-workout product will help maximise the benefits and impact of its ingredients.5

How long does it take pre-workout to kick in?

After consumption, caffeine takes about 45-60 minutes to reach peak levels in the bloodstream. If the pre-workout contains beta-alanine, you may experience tingling in your skin after 15 minutes or so.

How long does pre-workout last?

The half-life of caffeine is 4-6 hours, which is the time it takes for the amount of caffeine in your system to reduce by half. Tingling caused by beta-alanine will typically stop after around 90 minutes.

How often should you take pre-workout?

It's best to take pre-workout on the days you're training. Some ingredients, like creatine, need to be supplemented over an extended period to have any effect.

Should beginners take pre-workout?

Pre-workouts can be useful for anyone looking to boost their performance. For beginners they can be particularly good for getting through a session when you’re not feeling your best, but it’s best not to rely on them too much so early on in your training. Listening to your body, consuming a well-balanced diet and giving yourself plenty of recovery time are more important when you’re new to training.

Do athletes take pre-workout?

Many athletes take pre-workout supplements to help improve their performance during training or competition. Pre-workout's effect on endurance may make it a useful supplement for a boxer to train harder, a runner to run further, or a weightlifter to do more reps.

Yogis and other fitness enthusiasts may also take pre-workout supplements to help increase their focus and energy during workouts.

Why is my pre-workout clumpy?

Your pre-workout might arrive and seem to be pretty clumpy. But fear not. You don’t need to hit up the customer services department. It’s actually totally normal.

Common pre-workout ingredients including L-Citrulline and glycerol are what are known as hydroscopic ingredients. In easy to understand terms this basically means these ingredients draw moisture out of the air and can make the pre-workout powder stick together in clumps.

The extent to which you find your pre-workout clumps together can also be affected by the humidity in the factory is was produced in, or the humidity in the area where you live. The more moisture in the air, the more clumps your pre-workout is likely to have.

Is it safe to use clumpy pre workout?

Although it might feel strange, clumpy pre-workout can be expected — especially if you leave your pre-workout in a humid environment — yes, we’re talking about your sweaty gym bag. But if the product is in date then it should be safe to use.

Follow the instructions on the pre-workout packet of how to take your pre-workout and you’ll be fine.

Can I still use clumpy pre-workout?

While it’s still safe to use pre-workout that has gone clumpy in the tub, there are some preventative measures you can take if you’d rather avoid clumping altogether.

  • Avoid leaving your pre-workout in your car for long periods. The moisture in the air of a car that gets cold and then gets hot and vice versa can cause the pre-workout to clump.
  • Avoid leaving your pre-workout in a moist area like your gym bag or on the side in your kitchen. To stop clumping it’s best to store your pre-workout in a cool, dry place.

Can you keep pre-workout in the freezer to stop clumps?

TikTok is full of people providing their own solutions to what helps them to avoid clumps in their pre-workout. And one of the most common solutions is to keep your pre-workout in the freezer. This makes sense, the cold environment helps to avoid any moisture building up in the powder.


When should I take pre-workout?

This supplement is best taken between 30 and 60 minutes before your workout.

What is pre-workout?

These supplements are usually a combination of ingredients aimed to boost your energy and increase your performance during workouts.

What does pre-workout contain?

Pre-workouts commonly contain Caffeine, Vitamin B, Beta-Alanine, Citrulline Malate, Creatine, L-Glutamine and vasodilator ingredients.

What are the benefits of pre-workout?

The main benefits of pre-workout include increases in performance and strength. Studies have shown short term increases in lean body mass and lower body strength when supplementing consistently.

What are the side effects of pre-workout?

Potential side effects depend on the ingredients of your pre-workout. The common ingredient caffeine can cause nausea, headaches and heart palpitations for those who are caffeine sensitive.

Take Home Message

Pre-workout supplements are designed to help increase your performance by boosting energy, power, and stamina. They’re generally taken about half an hour before your workout, and the benefits include improved muscle strength, cognition, lean gains, and endurance. To better select the optimal shake for before your workout, consider what your goals are.

Taking a pre-workout consistently can help maximise its impact on your performance. They can help you feel more confident in taking the next step in your training sessions and provide the boost you need to reach your peak performance level and continue to advance your physical abilities.



Enjoyed this expert article?


Our articles should be used for informational and educational purposes only and are not intended to be taken as medical advice. If you're concerned, consult a health professional before taking dietary supplements or introducing any major changes to your diet.

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Founded around a kitchen table in 2004, Myprotein’s vision has always been to revolutionise how we power movement. In 2011 Myprotein became part of the THG family, and by 2016 we proudly claimed the title of the world’s leading online sports nutrition brand. Over the last 20 years, we’ve created game-changing supplements like Clear Whey and Dry Scoop Pre-Workout and launched new brands tailored to your needs including MP, Myvitamins, Myvegan and MyPRO. We exist to break boundaries. To help you cut through the noise in the fitness industry and get down to the information you can trust. Our blog features articles from trusted PT’s, nutritionists and dieticians with tons of experience in the industry. We listen to what topics you’re interested in, and dip into our pool of experts to give you information you can trust.