WINTER BASE TRAINING FOR A SPRING MARATHON

Start with the last month, not race day.

Look at your last three or four weeks of running. Note the runs you completed, their duration, the longest outing and how you felt afterwards. Include missed sessions and reasons: a busy workday, poor sleep, illness, pain or a plan that asked for more time than you had. This gives you something useful to plan from.

Now compare that with the opening week of the marathon plan you are considering. If you currently run twice a week and the plan begins with five runs and a much longer Sunday, the gap needs attention. Do not assume that a confirmed race place makes that jump manageable.

Base training is the period in which you make a repeatable routine more established before the race-specific work increases. Its length depends on your recent running and the demands of the plan ahead. There is no universal number of base weeks that makes every runner ready for a marathon.

Work backwards from your event date to find when your chosen plan begins, then use the weeks before it deliberately. If there is not enough time to bridge a large gap, change the plan or goal rather than compressing several stages into one. Our running plan builder can help you organise dates and available days; it cannot replace an honest assessment of your starting point.

Make easy runs easy enough to repeat.

An easy run should not need a race-day effort to keep the pace showing on your watch. Start below the effort you think you can manage, then let it settle. You should be able to talk comfortably for a genuinely easy outing. If that means slowing down or including walking, those are useful tools.

The NHS uses the ability to talk, but not sing, as a rough guide to moderate intensity. That is a population-level activity guide, not a laboratory definition of your running zones. A watch’s default heart-rate zones may also be a poor match for you. Use breathing, perceived effort and repeatability alongside the numbers. [1]

Choose a route that lets you control the effort. On a hilly loop, slowing down on the climbs may be the sensible way to preserve an easy run. In wind or cold rain, the same pace may demand more concentration and effort than it did on a calm day. Comparing the pace alone can turn a useful outing into a frustrating one.

Ask a simple question afterwards: could I repeat the planned week without feeling that every run is a test? If the answer is repeatedly no, look at duration, effort and the spacing of sessions before adding more. Base training does not have to mean that every run is identical, but there should be a clear reason for making one harder.

Build a week with room to recover.

The example below is for an adult who already tolerates four runs totalling around 150 minutes a week, including a 60-minute outing, and some strength work. It is a way to arrange familiar training, not an instruction for a new runner to start at this frequency. If your recent running is lower, use your own shorter durations; do not jump to this example.

If you run three times a week, you could omit the short Saturday run rather than extending every other outing to “make up” the distance. If consecutive weekend runs are not working, move one or use another rest day. A four-run week is only useful if you can complete and recover from it.

Think about the whole day as well. A short run followed by a long shift on your feet is not experienced in the same way as a run followed by a restful afternoon. Put the session you most want to complete well on a day when you can reasonably support it.

Build the longer run without racing it.

Start from a longer outing you have completed comfortably in recent weeks. The next question is whether repeating it would be useful, not automatically how much you can add. Notice how you move later that day and how recovered you feel before the next planned session.

Keep the effort controlled from the beginning. Running the opening kilometres too quickly can make the final part feel like an endurance test when the aim was a manageable extension of easy running. A route with options to shorten it makes it easier to respond if the weather or your recovery is different from expected.

Use the outing to practise ordinary race-training skills: eating beforehand, getting out at a workable time, checking shoes and clothing, carrying what you need and noticing what food or drink is comfortable. For decisions about eating before the run, our pre-run fuel tool can give you food ideas to adapt and test.

You do not need to prove you can run the full marathon during the base phase. The aim is to arrive at the next training block with a routine and a starting volume you can support. If the planned longer run keeps disrupting the rest of the week, reconsider it rather than judging the week only by Sunday.

Keep strength useful and manageable.

Strength work does not have to disappear when running becomes more important. The NHS recommends strengthening the major muscle groups on at least two days a week for general health. That is not a direction to add two hard gym workouts on top of a running routine overnight. Start with work you can control and recover from. [1]

A 2022 review of 43 studies found that combining aerobic and strength training did not, overall, compromise gains in muscle size or maximum strength compared with strength training alone. Explosive-strength gains were more affected, particularly when the two types were performed in the same session. It supports combining them thoughtfully; it does not identify a perfect weekly schedule for every runner. [2]

A practical session can include a squat or split-squat variation, a hip hinge, calf work, a push, a pull and a trunk exercise. Choose versions that suit your experience and equipment. You should understand the movement and be able to keep control; adding load is a later decision. The strength-for-runners plan includes a sample session and exercise guidance.

If gym soreness repeatedly spoils your next run, change the dose or timing. Fewer sets, a familiar variation or more recovery may make the combination workable. When possible, avoid introducing a completely new leg workout immediately before the longer run you most want to complete comfortably.

Progress without treating 10% as a guarantee.

A percentage is convenient, but it cannot tell you whether a change suits your recent training. In a randomised study of novice runners, a longer graded programme based on the 10% rule did not reduce injury incidence compared with a standard programme. That does not make large increases safe; it shows why staying below a single percentage is not a guarantee. [3]

Make changes you can identify. If you add a running day, keep its first outing short and resist extending the long run at the same time. If you lengthen the longer outing, keep the rest of the week familiar. This is a practical way to make your diary easier to interpret, not a promise that a particular increase prevents injury.

Imagine you currently complete three easy runs comfortably. One possible next experiment is a short fourth outing while the other runs stay unchanged. Another is continuing with three runs for now because the fourth day would cost sleep or recovery. The second option can be the better preparation for a routine you actually sustain.

A worked example: a runner already comfortable with the 150-minute week above might repeat it, then try 65 rather than 60 minutes on the longer run while keeping the other three runs unchanged. That makes 155 minutes for the week. They might then repeat 155 rather than add again. This demonstrates one small, traceable change; it is not a required progression or a guarantee against injury.

Repeat a week when you need to. An easier week can also be useful when work, travel or recovery changes. Missed sessions are not a debt: putting them all into the next few days changes the plan you were trying to follow.

Support the training outside the run.

Make eating fit the week you are asking your body to complete. That can be as practical as having breakfast ready for an early run, taking lunch to work and keeping a useful snack available before an evening session. After training, plan an ordinary meal that includes carbohydrate, protein and other foods you enjoy rather than hoping to remember later.

Examples could be porridge with milk or fortified soya drink and fruit before a suitably timed morning outing, toast and yoghurt when you need something smaller, or a rice, chicken or bean and vegetable meal afterwards. These are meal ideas, not fixed portions or a personalised nutrition plan. Timing, appetite, allergies and gut comfort affect what works for you.

Do not assume that continually eating less is a shortcut to better marathon training. The IOC’s REDs consensus describes health and performance problems that can arise when too little energy is available for the body’s needs over time; it affects male and female athletes. Persistent fatigue, repeated injuries or menstrual changes deserve proper assessment rather than being accepted as a normal cost of commitment. [4]

Keep recovery notes simple: sleep, appetite, soreness, mood and whether easy running still feels manageable. One poor night is different from a pattern lasting several weeks. If a problem persists, get appropriate individual advice instead of trying to diagnose it from a watch score.

Know when you are ready for the next block.

Before beginning a race-specific plan, check that its first week resembles training you already tolerate. You should recognise the number of running days, have experience of the opening longer-run demand and have a realistic place for rest and strength. A plan that is suitable on paper still needs to fit your actual week.

Use a weekly review: what did I complete, which run felt harder than intended, and what is the smallest useful adjustment? If the routine feels manageable, that is evidence in favour of continuing. If pain, illness or unusual fatigue is disrupting it, that is a reason to reassess rather than chase the original dates.

During a short diary review, check your footwear, usual routes and food arrangements too. A small practical change can be more useful than another training session: preparing kit the night before, changing a route with too many interruptions or moving the long run to a day with time to recover.

Your winter target is a week you can repeat and build from. The next block should develop that foundation, not rely on you suddenly becoming a different runner when the calendar reaches the plan’s start date. This is general training information, not an individual assessment or rehabilitation plan.