How Long Does It Take to Train for a Marathon?

Running a marathon is one of the most rewarding personal accomplishments of many people’s athletic lives. Covering 26.2 miles in a competitive setting is certainly a milestone worth cherishing, and it is well worth setting aside the time to train for, as the fitness level you’re likely to attain simply by preparing for a marathon may be more valuable to you in the long run than the achievement of running the marathon itself.

The key word in the last sentence is “running,” because it has been said that anyone can walk or walk-run a marathon, but actually running a complete marathon from start to finish requires a different level of dedication and preparation. So if your goal is to legitimately run the entire marathon distance without stopping, how long will you realistically need to train before subjecting your body to that sort of exertion?

Experienced Runner

If you’re the type of person who routinely runs six miles before work every day simply for the sake of improving your health, you’re in luck. That sort of training pattern places you in the perfect position to immediately launch a structured marathon training plan with a relatively short runway. 

The reason you’re already at a significant advantage is because your muscles and joints have done the crucial work of adapting to the rigors of running a minimum of 30 miles per week, and your aerobic conditioning is already stellar. All you need to do is begin a structured 12- to 16-week marathon training program — the most common lengths for marathon training programs — and gradually build your running volume over a three- to four-month period with a confirmed race-day in mind.

Intermediate Runner

If you’re an intermediate runner, congratulations, because you’re probably in solid shape to the satisfaction of most people. In your present condition, you can probably complete a 10K run — or slightly more than six miles — without stopping. However, your muscles and joints haven’t been subjected to the grueling process of becoming acclimated to covering a distance that is more than four times longer than that.

In essence, if you can complete a 10K but experience significant discomfort while doing so, you should probably give yourself an additional eight to 12 weeks beyond the 12- to 16-weeks required for experienced runners to get your body accustomed to the feeling of daily aerobic running for several miles each day. 

Complete Beginner

When we refer to someone as a complete beginner, we’re presuming that you do little to no aerobic training whatsoever, and you would find it challenging to run multiple miles at a time without experiencing serious discomfort. 

If you’re in aesthetically respectable shape, this can be very humbling, because you may be strong, lean, and otherwise fit-looking, especially if you engage in regular resistance training. Nonetheless, for purposes of marathon preparation, you are still classified as a beginner, and for the sake of your own safety, you should adhere to the recommended training protocols. 

Under these circumstances, it is wise to give yourself at least six months of guided preparation in what is essentially a couch-to-marathon program. This way, you can gradually build your training volume over time, as the distance you can comfortably cover grows from a quarter of a mile all the way to 26.2.

A note about weight

One of the factors that may lead you to extend the time it takes to train for a marathon from six months to a full year would be if you are beginning your marathon training at a stage when you are much heavier than the average marathon runner. 

Please keep in mind that people of all heights, weights, and dimensions are capable of running marathons if they are conditioned enough. However, unnecessary weight can seriously inhibit your movement efficiency, and also adds considerable stress to your joints during the many hours of training that you’ll spend running.

Just for the record, elite marathon runners usually have a body fat percentage of around 10 percent, and use a rule-of-thumb formula for establishing a ballpark for their ideal weight at their height by multiplying their height in inches by two. For example a 6’0” runner (72 inches) would have a ballpark ideal weight of 144 pounds.

This is not intended a recommendation; it is a reflection of just how advantageous strategic weight loss can be during your preparation to run a marathon. 

Safety before success

As attractive as the thought of completing a marathon is, it is not a thing to be taken lightly. If you’re out of shape or deconditioned and attempt to tackle 26.2 miles of running, musculoskeletal injuries and severe dehydration may be among the mildest consequences that await you. For this reason, you are advised to take serious stock of your present physical condition, and follow the training plan that will get you across the finish line safely and successfully. 

Summary

1. Training for a marathon requires a structured approach to training that develops the energy systems and muscle endurance required to run 26.2 consecutive miles without stopping.

2. Experienced runners who run several miles on multiple days each week can probably be fully prepared to run a marathon after three to four months of escalating training.

3. Intermediate runners who can cover distances of at least six miles without stopping but would be challenged by longer distances should probably train for four to six months to fully prepare themselves for the rigors of a marathon.

4. People who perform no regular running should allow themselves anywhere from six months to one year of training to fully prepare themselves for a marathon.

5. No matter what your level of experience is, unproductive weight can be detrimental to your running efficiency, so you are advised to shed unnecessary weight to improve your odds for success.

6. By carefully following a training plan, you can ensure that you will be able to cross the finish line of a marathon safely and successfully.