How to Train for a Marathon: A Step-by-Step Plan

Running a marathon is one of the most demanding sporting challenges out there and it’s estimated that less than 1% of the global population will run a marathon race in their lifetime. Covering 26.2 miles requires careful preparation, consistent training, and a commitment to both physical and mental conditioning. However, if you manage to go the distance, few things can beat the rush of crossing that finish line, and that is one of the many. There's a reasons why so many people get hooked on marathons!

If you're thinking of booking in for your first marathon, or are looking to hit a new PB this season, we are giving you the tips and methods for a successful marathon training block.

We'll give you a straightforward step-by-step approach to training for a marathon, plus extra tips to help make your run both comfortable and fun.

Step 1: Assess your starting point

Before you begin training, assess your current fitness level. Be honest, it's very important that you have a good understanding of where you're starting from, as going too hard too soon could spell disaster for your marathon ambitions.

Consider your running background, weekly mileage, and general health. If you are new to running, it is wise to gradually build up your marathon training with shorter distances and strength and conditioning

before launching into a complete marathon plan. If you have more experience, reflect on recent races, training consistency, and any recurring injuries. This will help you to see where you're doing well, and what you need to work on in time for your marathon.

Step 2: Set a realistic goal

A goal is essential for motivation, but it's very important that this goal is achievable. Otherwise, you're likely to either injure yourself by aiming for something unattainable or get demotivated and give up your marathon training plan.

A goal is essential for motivation, but it's very important that this goal is achievable. Otherwise, you're likely to either injure yourself by aiming for something unattainable or get demotivated and give up your marathon training plan. Don’t forget why you started running

For beginners, a realistic goal may be as simple as 'complete the marathon'. Whereas, more experienced runners might target a specific time or look to improve on a personal best.

Ideally, your goals should be based on your current fitness level rather than a hypothetical, better-trained future you. While you will almost certainly build fitness as your training plan proceeds, setting the bar too high too early can lead to overtraining and burnout. Meanwhile, an achievable but challenging target provides focus and purpose throughout your training. Many runners who are having a successful training block can get bored with their training plan, which can lead to going harder or faster than prescribed. Although this is a positive sign that your training is going to plan, it is essential to keep efforts within reason - making sure you don’t burn out, fatigue or lower the quality and performance of your long runs.

Step 3: Select a training plan

Beginner

A good beginner marathon training plan will focus on raising your stamina, improving your running style, and gradually increasing the distance and consistency that you run each week. At this stage, don't aim to cover miles and miles from the get-go. The emphasis should be on endurance over mileage. By concentrating on building your endurance week by week, the mileage will follow naturally.

What kind of training schedule should beginner runners aim for? Three to four runs per week is a good start, with the majority being shorter runs at a slower pace. This will allow your body to find and get used to a manageable gait and pacing. More importantly, it will build stamina in a steady, achievable manner whilst looking after your body.

Adding a longer run to your weekly schedule will also help you to see clear progress as the distance you can cover increases. Many traditional coaches and plans will suggest that you follow an 80/20% split between slow and fast/hard runs, and a long run is the perfect way to achieve that balance. Keeping an 80% slow or easy run balance is a great benchmark to ensure you are managing your training load without going to hard, as well as it being ideal for those training for the longer, more sustained marathon efforts.

Rest days are important at all stages of training, but especially so for beginners. You're at high risk of overtraining if you come to long-distance running as a beginner. Rest days will help your body to adapt, recover, and get accustomed to running.

Intermediate

Intermediate runners usually have some racing experience and an established understanding of gait and pacing. At this level, you can start to build in more speed work, allowing you to build anaerobic fitness whilst also building your aerobic base - a great balance for those looking to build their endurance, whilst also looking to make their slow paces faster.

An example would be to include tempo runs in your training plan. Tempo runs are periods of sustained running at a moderately difficult pace ('tempo'), for around 20-60 minutes. Finding a good cadence (180) to run to is helpful for keeping your pace steady and sustained during tempo runs.

Interval training is also useful at this stage. It involves 'intervals' of high-intensity exercise interspersed with more moderate exercise.

You can also start to focus more on building your base mileage through longer distance runs and really push yourself to increase your distance as part of your intermediate training plan.

Advanced

Advanced marathon training plans are designed for experienced runners who want to achieve specific performance goals.

If you are an experienced runner and want to get into advanced, competitive marathon training, you should aim to mix in plenty of strength training, interval training, structured speed sessions, and race-pace training (i.e. running for long distances at the pace you aim to maintain during the marathon event).

Remember, it's also essential to focus on race recovery. Injuries and overtraining at a high level can put an end to your marathon dreams. So, build in plenty of rest days, and focus on proper hydration and nutrition.

When it comes to experienced marathon runners who want to improve their efficiency, performance and comfort at marathon distance, many runners opt to employ the help of a dedicated running coach. Many running coaches come from elite level backgrounds, which gives you a whole new world of expertise, tips, training, nutrition and support for your training block.

Step 4: Structure your training week

A well-balanced training week is the backbone of marathon preparation. Assuming that you have a typical work schedule (with weekends free), your plan might include a long run at the weekend, midweek runs at varying intensities, and rest or cross-training days. Of course, if your work schedule is different, then adjust accordingly.

The long run builds endurance, while shorter runs at faster paces improve your aerobic capacity. Strength sessions, stretching, and easy recovery runs fill out the week. All in all, this kind of training schedule will make sure that you develop both stamina and resilience.

If you want, add cycling and swimming sessions to help build stamina and your cardiovascular capacity while resting your running muscles.

Step 5: Build volume gradually

Increasing mileage too quickly is one of the most common causes of running injuries. A gradual approach that respects your skill level and listens to your body is key.

Many runners follow the principle of adding no more than ten per cent to their weekly mileage. This lets their body adapt smoothly to their new running regime without unnecessary strain. They can steadily extend their long runs over the weeks, preparing them for the physical and mental challenges of marathon running. 

However, this isn’t a hard and fast rule. You may find that some weeks you can’t increase your mileage by ten per cent, and others you may be able to handle slightly more. The main thing is to listen to your body and only increase your mileage when you feel ready.

Step 6: Add practice races along the way

A great way to build confidence is to sign up for shorter races during your marathon training. Events like 10Ks and half marathons act as milestones, helping you track your progress and give you a taste of race-day conditions. They’re also the perfect opportunity to rehearse pacing, fuelling, and kit choices before the big race.

Many races are scheduled to fit into marathon build-up periods, so it’s usually easy to find one that aligns with your training and level. Start off with a 10K early in your training as a great way to show how your stamina is improving, and move on to a half-marathon as a stepping stone for the full marathon distance. The key is to treat these practice races as part of training rather than all-out efforts. Save your peak performance for the marathon day. 

Step 7: Build strength, flexibility, and resilience

Strength work

Strength training helps prevent injury and will make your running mechanics a lot more efficient. Focus on exercises that target your running muscles (legs, core, and hips), such as squats, lunges, planks, and step-ups. Two short sessions per week are often enough to provide benefits without interfering with running recovery.

Remember, while it can be tempting to do strength training on any day that you're not distance-running, it is important to build adequate rest into your programme. Take some days off for rest and recovery.

Mobility and stretching

Good mobility is important for fending off stiffness and supporting recovery. Mobility training and stretching will also give your joints a degree of flexibility that helps to avoid injury.

Incorporating dynamic stretches before runs and static stretches afterwards helps keep muscles warm and flexible. Yoga and pilates can also be valuable additions which build balance and control.

Cross-training

Cycling, swimming, and rowing are excellent low-impact ways to build cardiovascular fitness while giving your running muscles a break. Cross-training once or twice per week can help improve your endurance and reduce injury risk.

Step 8: Fuel right from day one

Nutrition plays a vital role in marathon success. You should start building good nutrition habits the moment you start training (or, ideally, before!).

Carbohydrates are the primary fuel for long-distance running, and many runners boost their energy stores by carb-loading in the three to four days leading up to the race. Protein, on the other hand, is essential for muscle repair and recovery. Aim for a balance of healthy carbohydrates, such as whole grains, fruits, legumes, and lean protein sources like chicken or fish.

Hydration is extremely important, especially during summer training. Drink plenty of water or sports drinks, but avoid anything too fizzy. Practice taking sips from your water bottle on the go as you train.

There is no 'one size fits all' fuelling strategy. Devote some of your marathon training to working out the nutrition and hydration strategy that works for you. And remember, when race day rolls around, pack light, easy fuel wins, such as energy gels and water bottles to keep you going.

Step 9: Taper before race day

The 'taper' is the period of reduced training in the final two to three weeks before the marathon. Tapering allows your body to recover from months of training without losing fitness.

To taper effectively, shorten your runs and steadily reduce your base mileage. It can feel counterintuitive to train less as marathon day gets closer, but this taper and rest period is essential for being as fresh, fit, and strong as possible when you arrive at the start line.

Step 10: Choose the right gear

The right clothing and footwear can make a huge difference to race day success. Arguably, the most important thing to invest in is footwear. Don't skimp on running shoes – go for the very best you can afford. If you can, complete a gait analysis to find the best footwear for your running style.

The clothing you wear also makes a difference. The wrong kind of clothing can rub, and leave you hot and sticky during your run. On the other hand, comfortable, moisture-wicking clothing will reduce the risk of chafing as you're pounding the tarmac.

Ideally, you should go on as many training runs as possible in the same kit you plan to wear on race day. This allows you to identify and solve any problems with your clothing in advance.

Accessories like hydration belts, GPS watches, or energy gel holders can also be a big help with your first marathon, so don't ignore the potential of accessories when you're planning your race day kit.

Step 11: Race day strategy

If you have a plan for race day, you're more likely to succeed. For example, you might plan to start at a steady pace, resisting the urge to set off too quickly. You could also break the race into manageable sections to stay mentally focused. Make use of aid stations for hydration and fuelling, and stick to strategies you have practised in training.

Remember that mental strength is as important as physical preparation, especially in the later stages of the race. Work on a race-day strategy that keeps your head in the game and maintains the motivation needed to push yourself over the finish line.

Post-marathon recovery

Finishing a marathon is an enormous achievement, but a marathon is a lot to put your body through, and recovery is crucial.

Immediate marathon recovery includes rehydrating, eating a balanced meal, and stretching. It might be tempting to collapse into a heap the second you cross the finish line, but this isn't ideal for your body or your mind. A bit of gentle walking and stretching will help to keep you limber for longer and prevent your muscles from seizing up.

In the following days, focus on rest, light activity (such as walking or swimming), and adequate sleep. On the mental side, many runners experience a post-race low as the excitement and endorphins of marathon day wear off. To combat this, you could try setting new goals to rebuild motivation and purpose. This could be a new race or something completely different.

The right marathon training plan will take you over the finish line

Training for a marathon is a demanding but deeply rewarding journey. By following a step-by-step plan, you can build the endurance, strength, and resilience needed to complete the distance.

Every runner’s path is different, but with commitment, patience, and smart preparation, crossing the finish line is an achievable goal.

FAQs

How long does it take to train for a marathon?

This depends a lot on your base fitness level and running experience. As a general rule, you can expect to train for 16 to 20 weeks (three to four months). If you're a total beginner, it's a good idea to add several more weeks to the start of this plan to allow yourself to build up some stamina and running technique. Similarly, if you are an experienced runner, you may not need the full 20 weeks before you're ready.

Do I need to run the distance of a full marathon before race day?

No. In fact, it's quite rare for marathon trainers to run a full marathon during training, as doing so can increase the risk of injury. Most marathon training plans build the long run to around 18 to 22 miles. If it feels daunting to run the full distance for the first time on race day, don't worry. You'll find that adrenaline and crowd support help the extra miles fly by.

How many times a week should I run when training for a marathon?

This depends a lot on your base training level, goals, experience, and ability to recover. Most runners train three to five times per week, but if you're struggling to recover from that kind of intensity, then scale it back and build up. Alternatively, if you can easily do more training, then feel free to add in extra runs, with the proviso that you don't forget to include rest days. Also, remember that quality sessions focusing on technique and building mental fortitude are more important than simply increasing the number of runs you take in a week.

Should I train in my race day kit?

Yes. Training in the clothing and shoes you intend to wear on race day helps ensure comfort and prevents problems such as blisters or chafing. It will show you what's comfortable and what's not, and make sure that you've fixed any issues with your kit well before the actual marathon.