Half Marathon Training Plan for Beginners: A 16-Week Programme

Short answer: If you can already run for around 30 minutes without stopping, you can prepare safely for a half marathon (21.1 km) in 16 weeks. The plan has four phases: base (habit and durability), build (gradually lengthening the long run), specific preparation (getting used to race effort) and taper (reducing the load so you arrive rested). Three or four runs a week, one or two strength and mobility sessions and at least one full rest day are enough. We recommend getting medical clearance from a doctor before you start.

This guide is written for first-time half marathon runners, and especially for employees preparing together as part of a company running team. It covers training principles, a week-by-week long run table, how to prepare as a team, race week and general injury prevention. The advice here is general: if you have a health condition, a history of injury or a chronic illness, adapt the plan with a doctor and, ideally, a running coach.

Before you start: are you ready?

A 16-week half marathon plan does not start from zero; it starts from regular running. You can begin this plan if all three of the following apply:

• Over the past month you have run, or done a mix of brisk walking and running, at least twice a week.
• You can run for about 30 minutes without stopping at a comfortable pace at which you could hold a conversation.
• Your doctor has cleared you for regular exercise, and you have had no recurring pain or injury in recent months.

If you are not there yet, start with a six to eight-week run-walk period first: alternate walking and running intervals and lengthen the running sections a little each week. For teams who want to do this pre-phase together at work, a company running club is a good foundation.

How to judge effort: the talk test instead of heart rate

The most common mistake beginners make is running every session “a bit hard”. Instead of exact paces or heart rate figures, this plan uses three simple effort descriptions:

• Easy effort: a pace at which you can speak comfortably in full sentences. Most of your running should be at this effort, including the long runs.
• Moderate effort (tempo): a controlled but demanding pace at which you can manage short sentences but would rather not chat. It is close to half marathon race effort.
• Hard effort: a pace at which you can only say a few words. It is used for short repetitions, with walking or very slow jogging in between to recover.

Stop the session and seek advice from a health professional if you ever feel unwell or experience chest pain, dizziness or unusual breathlessness.

The four phases of the 16-week plan

Every fourth week is a lighter week: the total load drops a little so your body can absorb the previous three weeks. Do not skip these weeks; fitness improves while you recover.

Week by week: long runs and quality sessions

The table below is the backbone of the plan. The long run distances are approximate; if you feel tired in a given week, repeating the previous week's distance is always a safe choice.

Keeping the longest training run below race distance is deliberate. For a beginner, running 21 km in training brings more fatigue and injury risk than benefit; race-day adrenaline and rested legs carry you through the final kilometres.

Weekly structure: a sample week

A typical week in the build phase might look like this. Move the days around to fit your work calendar; what matters is that hard days are not back to back.

1. Monday: rest, or a gentle 20–30-minute walk.
2. Tuesday: quality session (warm-up, the tempo or interval block from the table, cool-down).
3. Wednesday: 30–40 minutes of strength and mobility (hips, calves, core).
4. Thursday: easy run, 30–45 minutes.
5. Friday: rest.
6. Saturday: easy run, 25–35 minutes, finishing with a few strides.
7. Sunday: long run at easy effort.

Do not skip strength work. Single-leg exercises, glute bridges, calf raises and core stability support running economy and are the cheapest insurance against overuse injuries. For desk-based staff, short stretching breaks during the day also help; if you would like to organise this at work, an office stretching workshop is one option.

Training as a team: the company running team advantage

You can prepare for a half marathon on your own, but 16 weeks is a long time, and motivation tends to dip somewhere between weeks six and ten. Preparing with a company team has concrete benefits:

• A fixed group run: meeting at the same day and time every week weakens the “I can skip it today” voice. Make this your long run or quality session day.
• Pace groups: not everyone runs at the same speed. Create two or three pace groups, each with a pacer, so nobody is left behind and nobody is held back.
• A shared calendar and progress board: ticking off weekly targets on a shared sheet makes everyone visible to one another. The aim is consistency, not competition.
• Coaching support: a running coach leading the group corrects technical errors early and adapts the plan to individual needs.
• A shared goal and identity: racing in the same kit creates a strong shared story inside the company, and colleagues who come along as supporters become part of it too.

You can see how we manage team set-up, coaching, group training and team race entry as a whole on our corporate running team page, and the half marathon-focused package on our corporate half marathon team service. For a step-by-step guide to setting up a club from scratch, see how to start a company running club.

An important note on race entry: entry to official races is made through each race's own official channel, by each participant individually. What can be coordinated on the company team side is race selection, tracking registration dates, travel, accommodation, team kit and race-day logistics. Race places and bib numbers are not sold, and entry cannot be guaranteed.

Race week

The final week is not the time to try anything new; it is the time to calmly repeat what you already know works.

• Training: a short easy run with a few strides early in the week; rest two days before the race; an optional, very gentle 15–20-minute jog the day before.
• Sleep: it is normal to sleep badly the night before; what matters more is your sleep pattern across the whole final week.
• Food and fluids: make sure you have already tested your race-morning breakfast and any gels or drinks you plan to use during your long runs. Do not try a new product on race day.
• Kit: your shoes should have done several long runs; never race in new shoes or new socks. Lay out your kit the day before according to the forecast.
• Logistics: share bib collection times, transport to the start, bag drop and the team meeting point with everyone in advance.
• Race strategy: run the first 5 km deliberately at easy effort, settle into moderate effort through the middle, and if you still have energy in the last 3–4 km, pick up the pace. The goal of a first half marathon is to finish and enjoy it.

Injury prevention: general rules

Most injuries in new runners come from doing too much, too soon. The rules below are general guidance and are not a substitute for medical advice.

• Do not increase your weekly running time or distance in big jumps; stick to the gradual progression in the table.
• Learn to tell pain from muscle fatigue. If pain increases during a run, makes you limp or is still there the next day, stop and see a health professional.
• Do not try to make up missed weeks; resume where you left off or drop back a week.
• Replace your shoes as they wear out, and choose a model that suits your feet with help from a specialist.
• Do not skip the warm-up (5–10 minutes of walking and easy jogging) or the cool-down.
• Sleep, adequate nutrition and rest days are part of the plan, not a luxury.

Common mistakes

• Running every session at moderate effort: easy days should be easy and hard days controlled.
• Chasing the fastest person in the group run: stay in your pace group.
• Skipping the lighter weeks: fatigue builds up and form drops.
• Trying something new on race day: shoes, kit, gels and breakfast should all be tested beforehand.

Conclusion

Preparing for a half marathon is a patient, gradual 16-week process: regular easy runs, one quality session a week, progressively longer long runs, strength work and enough rest. Doing it as a team protects motivation and leaves a lasting running culture inside the company. For more running content, take a look at our running page.

If you would like to plan a coached half marathon preparation programme and team race coordination for your company, explore our corporate running team page or share your headcount, current level and target race period through our quote form.