How to train for a half marathon (2026)
Quick Answer
To train for a half marathon, first decide your race date, current fitness level and goal: simply finishing, or running a target time. Then build a realistic plan around regular easy running, one weekly longer run, recovery, and gradual progression over several weeks or months. The best plan is the one you can follow consistently without getting injured or exhausted.
Overview
Half marathon training is mostly about planning sensibly rather than cramming hard sessions. You need enough time to build the habit of running several times a week, extend your longest run gradually, and arrive at race day fresh rather than overtrained. The main stages are: choosing a race or training end date, checking your starting point, selecting a suitable plan, building your weekly routine, practising race-day basics, and tapering before the event. What you decide first matters: whether you are already running regularly, how many days a week you can honestly commit, whether you have any injury history, and whether your aim is to finish comfortably or chase a faster time. A beginner starting from little or no running usually needs a longer build-up than someone who already runs consistently. People often forget to plan for recovery days, strength work, shoes and kit, fuelling practice, bad-weather alternatives, illness or missed weeks, and race logistics such as travel, start time and toilet queues. A good half marathon plan leaves room for real life. If you are unsure, choose the easier plan, keep most runs easy, and increase training only when your body is coping well.
Who this is for
Adults planning to train for a road half marathon, from newer runners building up carefully to regular runners choosing a structured plan.
What you’ll need
- a race date or target training end date
- current view of your fitness and recent running history
- a realistic weekly schedule
- suitable running shoes that feel comfortable
- comfortable running clothes for likely weather
- a way to track runs, such as a watch, phone app or training diary
- basic hydration and, for longer runs, a way to practise fuelling
Before you start
Decide whether your goal is to finish, finish comfortably, or aim for a specific pace. Check that you can currently run or walk-run safely and consistently, and be honest about how many days each week you can train. If you have chest pain, dizziness, unexplained breathlessness, or an injury that worsens when you run, seek medical advice before starting. Also check the race organiser's rules, cut-off times and course details on the official event website.
Step-by-step
- 1
Choose your race and set a realistic goal
Pick a half marathon date or create a target date if you are not entering an event yet. Decide whether your goal is simply to complete the distance, run continuously, or target a faster result. Note practical constraints such as work, family commitments, holidays and likely weather.
Why: Your goal and date determine how much time you need, how ambitious your plan can be, and how hard you should train.
- 2
Assess your starting point
Write down what you can do now: how often you run, how long your easiest run feels comfortable, whether you can already do a weekly longer run, and any past injuries or health issues. If you are not yet running regularly, start with a walk-run build-up before moving to a full half marathon plan.
Why: Training should start from your actual fitness, not from what you wish you could do. This reduces injury risk and makes the plan more achievable.
- 3
Pick a plan that fits your life
Choose a plan based on your current level and available days, not just on the race distance. Most runners do best with a mix of easy runs, one longer run each week, and rest or cross-training days. More experienced runners may add a tempo, threshold or interval session, but beginners usually need consistency more than intensity.
Why: A simpler plan you can complete is better than an ambitious one you skip or abandon.
- 4
Build your week around easy running and one long run
Schedule your weekly longer run on the day you can protect best. Keep most other runs easy enough that you could speak in short sentences. Increase overall training gradually, and if you feel unusually tired or sore, hold steady rather than adding more. Add basic strength or mobility work on non-running days if it helps you stay robust.
Why: Half marathon success depends mainly on aerobic endurance, which is built through regular manageable running rather than constant hard effort.
- 5
Practise race-day skills during training
Use some longer runs to test shoes, socks, clothing, pacing, breakfast timing, hydration and any gels or other fuel you plan to use. Practise starting slower than you think you should and finishing stronger if possible. If the race course has hills, include some hill running in training.
Why: Nothing new on race day is a good rule. Practising logistics and fuelling helps prevent stomach issues, chafing, blisters and pacing mistakes.
- 6
Plan for setbacks and recovery
Expect that life may interrupt training. Decide in advance what you will do if you miss a few sessions: usually resume with the next planned easy run rather than trying to make everything up. Keep at least some true recovery time, sleep well, and cut back if pain changes your gait or gets worse as you run.
Why: Missed training is normal. Trying to catch up too aggressively is a common route to fatigue and injury.
- 7
Taper and organise race week
In the final period before the race, reduce your training so you arrive rested while keeping some light running to stay sharp. Confirm travel, bib collection, start time, kit, weather forecast and what you will eat and drink before the start. Lay everything out the night before.
Why: Fitness is built before race week; the final job is to remove avoidable stress and let your body recover.
Why this works
Half marathon training works by gradually improving your aerobic system, muscular endurance and pacing judgement while allowing enough recovery for adaptation. Most runners improve best when the majority of training is easy, with longer runs building confidence and stamina over time.
Common mistakes to avoid
- starting with a plan that is too advanced for your current fitness
- running too fast on easy days
- increasing distance or intensity too quickly
- ignoring niggles until they become injuries
- forgetting to practise fuelling, hydration and race kit
- trying to make up missed sessions by doubling up or overloading the next week
- neglecting sleep, recovery and strength work
Troubleshooting
You feel exhausted after most runs
Slow down, reduce the training load, and make sure your easy runs are truly easy. Check sleep, stress and whether you have added too much intensity.
Your long run pace keeps fading badly
Start more conservatively, shorten the long run slightly for a week or two, and practise taking fluids or fuel if appropriate for the duration and your plan.
You miss a week of training because of work, travel or mild illness
Resume with easy running and do not try to squeeze missed sessions into the next few days. Rebuild calmly from where you are.
You get repeated aches in the same area
Stop pushing through it, reduce or pause running, review shoes and training load, and seek advice from a physiotherapist or sports medicine professional if it persists or affects your stride.
Race nerves make pacing difficult
Use a simple plan such as starting easier than goal pace, settling after the first part of the race, and only pushing later if you still feel strong.
Compare your options
Finish-focused beginner plan
Best for: people new to running or returning after a long break
Pros: more manageable, lower injury risk, easier to fit around life
Cons: slower progression, less focus on speed
Standard intermediate plan
Best for: runners who already train consistently and can handle several runs most weeks
Pros: balances endurance and performance, includes more structured sessions
Cons: requires better recovery and more schedule discipline
Coached or personalised plan
Best for: runners with a specific time goal, injury history or complex schedule
Pros: tailored to your level and setbacks, more individual feedback
Cons: usually costs more and may require more communication and tracking
| Option | Best for | Pros | Cons |
|---|---|---|---|
| Finish-focused beginner plan | people new to running or returning after a long break | more manageable, lower injury risk, easier to fit around life | slower progression, less focus on speed |
| Standard intermediate plan | runners who already train consistently and can handle several runs most weeks | balances endurance and performance, includes more structured sessions | requires better recovery and more schedule discipline |
| Coached or personalised plan | runners with a specific time goal, injury history or complex schedule | tailored to your level and setbacks, more individual feedback | usually costs more and may require more communication and tracking |
Alternatives
- follow a charity beginner half marathon plan
- use a walk-run half marathon approach
- train with a local running club or group
- work with a qualified running coach or sports physiotherapist
Pro tips
- Put your key weekly long run into your calendar first, then build the rest around it.
- Keep a simple training log with how the run felt, not just distance and pace.
- If in doubt, make the easy day easier rather than the hard day harder.
- Test anti-chafe products, socks and race kit before race day.
- Have a bad-weather option such as a treadmill, sheltered route or swapped training day.
- Check race cut-off rules, bag drop, transport and toilet arrangements well before the event.
Safety notes
- Stop and seek urgent medical help for chest pain, collapse, severe breathing difficulty or signs of heat illness.
- Do not run through sharp pain or pain that changes your form.
- Adjust training for extreme heat, cold, ice or poor air quality.
- Use routes where you feel safe, and consider visibility gear and lighting in low light.
- Hydration and fuelling needs vary; practise in training rather than experimenting on race day.
What this guide does not cover: This guide covers planning and structuring half marathon training in general terms. It does not replace individual medical advice, diagnose injuries, or provide a one-size-fits-all week-by-week training schedule.
Cost considerations
The main costs are usually race entry, shoes, clothing, travel and optional coaching or club membership. You do not need expensive gadgets to train well, but worn-out shoes and unsuitable kit can make training less comfortable or less safe.
Frequently asked questions
How long do I need to train for a half marathon?+
It depends on your starting point. Someone already running consistently can usually follow a shorter build-up than a complete beginner, who may first need a separate walk-run phase. Choose a timeline that lets you increase training gradually and stay healthy.
Can I train for a half marathon if I am not a runner yet?+
Yes, but start by building a basic habit of regular walk-run sessions before moving into a half marathon plan. Trying to jump straight into longer running usually leads to soreness, missed sessions or injury.
How many times a week should I run?+
That depends on your experience, recovery and schedule. Many people prepare successfully with a small number of consistent weekly runs centred on one longer run, while more experienced runners may handle more frequency.
Should every run feel hard to make progress?+
No. Most training should feel controlled rather than all-out. Easy running builds endurance and lets you recover enough to keep training regularly.
What if I miss several runs?+
Do not try to cram them in. Restart with easy running, shorten the next long run if needed, and continue the plan from where your body is now rather than where the calendar says you should be.
Do I need energy gels for a half marathon?+
Not everyone uses the same fuelling strategy. What matters is practising whatever you plan to use during training and following product instructions and event guidance rather than trying something new on race day.
Sources & references
Guidance on this page is traced to documented sources. Last checked 25 September 2026.
- NHS - Exercise · government
Supports general exercise safety, gradual progression and the role of regular physical activity.
- American College of Sports Medicine · industry
Supports principles of endurance training, progression and exercise safety from a recognised sports medicine authority.
- World Athletics · official
Supports recognised running event context and general running best practice from the global governing body for athletics.
Core training principles change slowly, but race rules, event logistics and current best-practice guidance on fuelling and heat safety can change.