Key takeaways
First-time marathoners do best with 16 to 20 weeks, because the long run and weekly volume need time to grow without big jumps
The long run builds gradually to about 3 hours or 30 to 32 km, with fuelling practised on every run over 90 minutes
A 2 to 3 week taper that cuts volume by roughly 40 to 60% while keeping some marathon-pace running is linked with faster finishes
A marathon is mostly a test of endurance, fuelling and pacing, run well below VO2max for three to five hours. A good marathon training plan grows your weekly volume and long run gradually, adds a little threshold and marathon-pace running, practises race fuelling and ends with a proper taper. Below is a 16-week plan for beginners, how to stretch it to 20 weeks, and a 12-week block for experienced runners.
These schedules are coaching practice informed by research, not protocols tested in trials. The evidence supports the shape: mostly easy running, gradual progression, rehearsed fuelling and a taper that cuts volume but keeps intensity. For how much VO2max matters in the marathon, see marathon training and VO2max.
How a marathon training plan works
- Easy running for about 80% of sessions, the pattern Seiler found across successful endurance athletes. Easy means conversational (easy run pace).
- A long run every week, the most important session (long run pace guide).
- One quality session: threshold or tempo runs early on, then longer marathon-pace work.
- Optional VO2max work in the first third of the block for intermediate runners, such as the Norwegian 4×4, before the focus shifts to marathon pace.
Two short sessions of strength training for runners a week fit easily around this.
Marathon paces by goal time
Enter a recent race into the VO2max running calculator for individual paces. These are Daniels and Gilbert VDOT model estimates; check them against heart rate with the heart rate zone calculator.
| Marathon | Model VDOT | Easy (per km) | Marathon pace | Threshold | Intervals |
|---|---|---|---|---|---|
| 5:00 | about 29 | 7:35–8:15 | 7:06 | 6:37 | 6:06 |
| 4:00 | about 38 | 6:05–6:40 | 5:41 | 5:19 | 4:53 |
| 3:30 | about 45 | 5:21–5:50 | 4:58 | 4:40 | 4:17 |
Goal pages such as sub-4 hours are collected in race goals.
Marathon training plan for beginners: 16 weeks
For runners who can already run about 10 km or 60 minutes comfortably and run three or four times a week. Leave a rest day after the long run. Walk breaks, including at aid stations, are a legitimate strategy.
| Week | Quality run | Easy runs | Long run (easy) |
|---|---|---|---|
| 1 | 30 min easy + 4 strides | 2 × 30 min | 70 min |
| 2 | 6 × 2 min brisk, 2 min jog | 2 × 35 min | 80 min |
| 3 | 3 × 6 min comfortably hard, 2 min jog | 2 × 35 min | 90 min |
| 4 (lighter) | 30 min easy + strides | 2 × 30 min | 70 min |
| 5 | 20 min tempo | 2 × 40 min | 100 min |
| 6 | 3 × 10 min at marathon pace, 2 min jog | 2 × 40 min | 110 min |
| 7 | 25 min tempo | 2 × 40 min | 120 min |
| 8 (lighter) | 30 min easy + strides | 2 × 35 min | 90 min |
| 9 | 2 × 15 min at marathon pace, 3 min jog | 2 × 45 min | 135 min |
| 10 | 3 × 10 min at threshold, 2 min jog | 2 × 45 min | 150 min |
| 11 | 45 min with 25 min at marathon pace | 2 × 45 min | 120 min, last 30 min at marathon pace |
| 12 (lighter) | 30 min easy + strides | 2 × 40 min | 100 min |
| 13 | 3 × 15 min at marathon pace, 3 min jog | 2 × 45 min | 165–180 min, max 32 km |
| 14 (taper) | 30 min with 15 min at marathon pace | 2 × 40 min | 120 min |
| 15 (taper) | 2 × 10 min at marathon pace | 2 × 35 min | 80 min |
| 16 (race) | Tue: 3 × 5 min at marathon pace | Thu: 25 min + strides | Race day |
Marathon training plan 20 weeks
Why 16 to 20 weeks for a first marathon? The long run has to grow from about an hour to about three hours, and weekly volume has to roughly double. Doing that in 12 weeks forces jumps in volume. The popular 10% rule is not proven: in Buist and colleagues' randomised trial of 532 novice runners, a 13-week graded programme based on it gave the same injury incidence as an 8-week standard programme (20.8% and 20.3%). But Nielsen and colleagues, following 874 novice runners, found that weekly increases of more than 30% were linked with a higher rate of distance-related injuries such as runner's knee and shin splints (hazard ratio 1.59), even though overall injury rates did not differ significantly. Longer plans leave room for lighter weeks and for missed days without cramming.
For the 20-week version, add four base weeks before week 1: four easy runs a week of 30 to 45 minutes, strides twice a week and a long run building from 50 to 70 minutes. Choose 20 weeks if you are newer to running, coming back from injury, or carry heavy work and family loads.
Marathon training plan 12 weeks
For experienced runners already running 40 km or more a week with a regular 90-minute long run.
| Week | Threshold or MP day | Second quality | Long run |
|---|---|---|---|
| 1 | 3 × 10 min at threshold | 5 × 3 min hard, 2 min jog | 110 min |
| 2 | 25 min threshold | 4 × 4 min at 90–95% HRmax | 120 min |
| 3 | 3 × 3 km at marathon pace | 8 × 1 min fast + strides | 135 min, last 30 min at MP |
| 4 (lighter) | 20 min threshold | none | 100 min |
| 5 | 2 × 5 km at marathon pace | 4 × 2 km at threshold | 150 min |
| 6 | 30 min threshold | 5 × 1000 m at interval pace | 26 km with 10 km at MP |
| 7 | 12 km at marathon pace | easy + strides | 165 min |
| 8 (lighter) | 20 min threshold | none | 110 min |
| 9 | 2 × 6 km at marathon pace | 3 × 10 min at threshold | 32 km with 14 km at MP |
| 10 (taper) | 10 km at marathon pace | 6 × 2 min at 10k effort | 24 km |
| 11 (taper) | 2 × 3 km at marathon pace | strides | 16 km |
| 12 (race) | Tue: 4 × 1 km at marathon pace | none | Race day |
Add two to three easy runs of 40 to 60 minutes each week.
Long run progression and fuelling practice
Build the long run by about 10 to 15 minutes every one to two weeks, cut back every third or fourth week and cap it at about three hours or 32 km, a common coaching cap because longer runs add fatigue and recovery time.
Use every run over 90 minutes to rehearse race fuelling. Burke and colleagues' review suggests 30 to 60 g of carbohydrate per hour for long events, and up to 90 g per hour for efforts beyond about 2.5 hours. The gut adapts: in a trial by Costa and colleagues, two weeks of repeated carbohydrate intake during running reduced gut symptoms. Start with 30 to 40 g per hour and build up. Never try a new gel on race day (runner's stomach and GI problems).
Marathon taper
Bosquet and colleagues' meta-analysis found the best tapers last about two weeks and cut volume by 41–60% while keeping intensity and frequency. In data from about 158,000 recreational marathoners, Smyth and Lawlor found strict tapers of up to three weeks were linked with better finishes, with a median gain of about 2.6% compared with minimal tapers. Both schedules above use a three-week taper with some marathon-pace running kept in (tapering before a race).
Safety: this is general information, not medical advice. If you have a heart condition, chest pain, dizziness or are new to exercise, check with a doctor before starting marathon training. Pain that changes how you run is a reason to rest. Drink to a tested plan and avoid drinking far more than you sweat.
Frequently asked questions
What is the best marathon training plan for beginners?
A 16 to 20 week plan with four runs a week, mostly easy, one gentle quality session and a long run that grows to about 3 hours or 30 to 32 km. Start only once you can run about 10 km or 60 minutes comfortably.
Is 16 weeks enough to train for a marathon?
For most first-timers who already run regularly, yes. Sixteen weeks allows a gradual long run build, lighter recovery weeks and a three-week taper. Newer runners, or anyone returning from injury, should add a 4-week base phase to make it 20 weeks.
Can I train for a marathon in 12 weeks?
Yes, if you are an experienced runner who already runs 40 km or more a week and has a long run of 90 minutes or more. For a first marathon, 12 weeks usually forces volume up too quickly.
How long should my longest run be before a marathon?
Most plans peak at about 3 hours or 30 to 32 km, three to four weeks before race day. Running longer than 3 hours adds fatigue and injury risk with little extra benefit for most recreational runners.
Sources
- Seiler S. What is best practice for training intensity and duration distribution in endurance athletes? Int J Sports Physiol Perform, 2010. PubMed
- Bosquet L, Montpetit J, Arvisais D, Mujika I. Effects of tapering on performance: a meta-analysis. Med Sci Sports Exerc, 2007. PubMed
- Smyth B, Lawlor A. Longer disciplined tapers improve marathon performance for recreational runners. Front Sports Act Living, 2021. PubMed
- Nielsen RO, Parner ET, Nohr EA, Sørensen H, Lind M, Rasmussen S. Excessive progression in weekly running distance and risk of running-related injuries: an association which varies according to type of injury. J Orthop Sports Phys Ther, 2014. PubMed
- Buist I, Bredeweg SW, van Mechelen W, et al. No effect of a graded training program on the number of running-related injuries in novice runners: a randomized controlled trial. Am J Sports Med, 2008. PubMed
- Burke LM, Hawley JA, Wong SH, Jeukendrup AE. Carbohydrates for training and competition. J Sports Sci, 2011. PubMed
- Costa RJS, Miall A, Khoo A, et al. Gut-training: the impact of two weeks repetitive gut-challenge during exercise on gastrointestinal status, glucose availability, fuel kinetics, and running performance. Appl Physiol Nutr Metab, 2017. PubMed
- Daniels J. Daniels' Running Formula. Human Kinetics (VDOT model used for the pace table).
- Plan structures are coaching practice informed by the studies above, not protocols tested in trials.