A marathon is one of the biggest challenges a runner can take on. Whether you're chasing a personal best, raising money for charity or simply looking to achieve something you once thought impossible, getting to the start line takes patience, consistency and preparation.
Training for 26.2 miles is about more than running. It involves building endurance, managing recovery, fuelling your body and learning to trust the process.
Here's a practical guide to help you prepare for your marathon, from your first training runs to race day.
How long does it take to train for a marathon?
For many runners, a marathon training plan lasts around 16–20 weeks. The right length depends on your current running experience, fitness, weekly mileage and the time you can dedicate to training.
If you're new to running, it's worth building a comfortable running base before starting a marathon-specific plan. If you're already running regularly, you may be ready to begin a structured programme.
The most important thing is not to rush. Gradually increasing your running volume gives your body time to adapt and helps you arrive at race day feeling prepared rather than exhausted.
Consistency beats trying to do too much, too soon.
What time should you aim for on your first marathon?
Your first marathon is a significant achievement in itself. While having a target time can help keep you motivated, completing the distance and enjoying the experience are goals worth celebrating.
When considering a time goal, think about:
- Your current fitness: Set a target that reflects your recent running, not simply where you'd like to be.
- Your training: Consistent training and long runs will help you understand what may be realistic.
- The course: Hills, terrain and weather can all influence your finishing time.
- Flexibility: Be prepared to adjust your expectations if conditions or how you feel on the day change.
Your first marathon doesn't define your ability as a runner. It's a starting point for whatever comes next.
What to eat before a marathon
Nutrition plays an important role in marathon preparation. Your body needs enough energy to support training, recover between sessions and perform on race day.
Carbohydrates
Carbohydrates are a key fuel source for endurance running. Foods such as oats, rice, pasta, potatoes, bread and fruit can help support your energy needs.
In the days leading up to a marathon, many runners increase their carbohydrate intake to help prepare for the distance.
Hydration
Drink regularly throughout your training and pay attention to your hydration, particularly during longer runs and warmer weather.
For extended runs, practise your hydration strategy in training rather than leaving it until race day.
Timing
Before a race, choose a familiar meal that you know sits comfortably with you. Many runners prefer a carbohydrate-rich breakfast around 2–3 hours before the start, depending on their routine and what they tolerate well.
Practise your race-day nutrition
Training runs are the time to experiment with breakfast, snacks and energy products.
Find out what works for you before race day. Avoid making major changes to your diet or trying unfamiliar products just before the event.
How to train for a marathon without getting injured
Marathon training places repeated demands on your body. Building gradually and allowing enough recovery can help reduce the risk of problems interrupting your preparation.
Increase your mileage gradually
Avoid making sudden jumps in distance or intensity. Build your weekly running in a way that feels manageable and allows you to recover between sessions.
Include different types of running
A balanced training plan may include easy runs, longer runs and some sessions focused on pace or speed.
Not every run needs to be hard. Easy running is an important part of building endurance.
Add strength and cross-training
Strength work can help support your overall running fitness. Activities such as cycling, swimming or mobility work can also complement your running.
Make recovery part of the plan
Rest days are not wasted days. Sleep, recovery and lighter sessions all contribute to your ability to keep training consistently.
Listen to your body
Some muscle tiredness is common during training, but persistent or worsening pain should not be ignored. Reduce your training and seek advice from a qualified healthcare professional if needed.
Wear comfortable, suitable running shoes
Choose footwear that fits well and feels comfortable over the distances you're running. Replace shoes when they are worn or no longer feel supportive.
What marathon training gear will you need?
You don't need an enormous amount of equipment to get started, but having comfortable, reliable kit can make training more enjoyable.
- Running shoes: A comfortable pair suited to your feet and running style.
- Technical clothing: Lightweight, breathable clothing that helps manage sweat and changing temperatures.
- Water bottle or hydration pack: Useful for longer runs, depending on your route and needs.
- Running socks: Comfortable socks that help reduce friction and keep your feet feeling good.
- Reflective clothing: Important when running in low light.
- Headtorch: Useful for early morning or evening runs in darker conditions.
- Cap or visor: Helpful for sun or rain.
- Sunscreen: Protect your skin during outdoor training.
- Foam roller or massage ball: Optional tools some runners use as part of their recovery routine.
The best kit is the kit that allows you to focus on your run without distraction.
Building your marathon training plan
A marathon training plan usually combines easy running, longer runs, some faster sessions, strength work and rest.
Your plan should reflect your current ability and gradually prepare you for the distance. If you're following a beginner, intermediate or advanced programme, make sure it is appropriate for your experience and recovery needs.
Beginner runners
If this is your first marathon, focus on establishing consistency before worrying about speed.
A suitable plan will generally include:
- Regular easy runs to build a comfortable running habit.
- Gradually increasing weekly distance.
- A weekly long run that builds endurance over time.
- Rest days to allow your body to recover.
- Optional low-impact cross-training or strength work.
If you're starting from very little running experience, consider building towards a comfortable 5K or 10K before beginning a marathon-specific plan.
Intermediate runners
If you've already completed shorter races or regularly run several times a week, your training may include:
- Consistent weekly running.
- A progressive long run.
- Tempo or controlled faster sessions.
- Easy recovery runs.
- Strength and cross-training.
- Planned rest and recovery.
The aim is to develop endurance and efficiency without making every session a hard effort.
Advanced runners
Experienced runners may have a more established training base and specific performance goals.
Their plans may include:
- Structured weekly mileage.
- Long runs with sections at planned marathon effort.
- Tempo sessions and intervals.
- Strength and conditioning.
- Recovery runs and rest days.
- A gradual reduction in training before race day, known as a taper.
Higher mileage and additional sessions are not automatically better. Training should be matched to experience, recovery and individual goals.
The final weeks before race day
As race day approaches, the focus shifts from building fitness to arriving fresh.
Follow the taper in your training plan, reduce the overall training load and avoid trying to make up for missed sessions at the last minute.
Use this time to prepare your kit, check your race arrangements and keep meals and routines familiar.
The finish line
Marathon training is a journey of small achievements. The early morning runs, the difficult sessions, the long weekends and the moments when you have to dig a little deeper all contribute to reaching the start line.
Whether you're aiming for a time, running for someone special or taking on the challenge for yourself, remember why you started.
The distance is 26.2 miles. The work begins long before the start line.
*This article is general information, not an individual training or medical plan. Choose a programme suited to your experience and seek qualified advice if you have concerns about injury, health or training load.*