Coach Jeff

Written by Coach Jeff


How Long Should You Wait Before Running Another Marathon

You’ve just finished your goal marathon and, if you felt anything like I do in the last 10k of a marathon, you swore off running another one as soon as you wrapped yourself in the Mylar blanket!

However, the memories of that tough last 10k will quickly fade and you’ll begin to contemplate when you can race the marathon again.

If you had a great race, you’re tempted to keep training to maintain fitness and see how far can push your new PR. Have a bad day and you’ll spend the next few hours searching the Internet for the soonest possible race you can extract revenge. Worst yet, have a mediocre race, especially if it’s the result of something out of your control (like a bathroom issue), and you won’t be able to get the “what if” scenarios out of your mind.

Regardless of the outcome of your race, the question in your mind quickly becomes, “how long should I wait between marathons for optimal performance?”

If your only goal at a marathon is to finish, have fun and enjoy the travel, then by all means, go ahead and race to your hearts content. However, if you desperately want to qualify for Boston or finally break that 3 or 4-hour barrier, then it’s imperative you structure your long-term training to maximize fitness and progression without burning out.

In this article, I am going to outline how long you should wait before running another marathon if your goal is optimal performance. You’ll learn why the recovery process is critical, the importance of training different energy systems to make continual gains, and how taking a long-term view of your training will enable you to toe the starting line for your next marathon fitter than you’ve ever been.

In this article, we outline the research and science about how long you should wait before running another marathon if your goal is optimal performance.

Marathons require recovery

Muscles, tendons, ligaments, and almost every physiological system is challenged when running a marathon. It doesn’t matter if you crushed your goal or struggled to walk/jog to the finish,  26.2 miles is a long way to go and your body endures tremendous physical duress. I’ve written before about why marathoners need to take downtime after their race.

Most marathoners will swear they don’t feel sore three to four days after a marathon. While that may be true, it doesn’t mean there isn’t still physical damage to be repaired. For example, research shows that two of the best markers of skeletal and myocardial tissue damage, creatinine kinase (CK) and myoglobin levels in the blood stream, persist more than seven days post marathon. While increased CK levels won’t cause you to feel sore, they are one of the scientific markers of overtraining.

This means that in order to fully recover after a marathon and ensure that you don’t set yourself up for overtraining down the road, you should give yourself two to three weeks of nothing but very easy running.

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Why running marathons close together limits your progress

Of course, you’re probably thinking, “well, if I shorten my recovery time a bit, I can get back to hard training sooner and turn around for another marathon in 6-10 weeks.”

Sure, you can definitely do this and I’ve seen many elite and non-elite runners make it work. However, this strategy only works once, maybe twice in a row, before you start to stagnate.

Let’s pretend you schedule two marathons 10 weeks apart. After the first marathon, you take two weeks easy to let your body recover. Then, you factor in at least a 2 week taper for the second race.  That leaves you a mere 6 weeks of training. While you can certainly fit some hard long runs and solid workouts in this time frame, it leaves little growth for long-term development.

For example, in six weeks time, you’re not able to fully develop your mitochondria. Mitochondria are microscopic organelle found in your muscles cells that contribute to the production of ATP (energy). In the presence of oxygen, mitochondria breakdown  carbohydrate, fat, and protein into usable energy. Therefore, the more mitochondria you have, and the greater their density, the more energy you can generate during exercise. Mitochondria density and development peaks at 10-12 weeks. Training segments that are less than this length decrease potential long-term gains.

As such, a proper marathon training segment should be at least 12 weeks long. Factor in your recovery from your last race and a taper (which doesn’t count as training) and you’re looking at 16 weeks between marathons.

Why you need to work on different energy systems

However, there is also another factor to consider. In order to make progress from year to year, you must train all of your energy systems, like speed and Vo2 max. But, why is this important to a marathon?

In the marathon, the primary focus of training is developing your aerobic threshold, increasing muscular endurance, and fuel efficiency. While you may do a little VO2max and speed training here and there, it’s often negligible. As a result, you may go years without improving your VO2max and running efficiency. In the long-term, this will limit your ability to improve at the marathon distance, no matter how many long runs you do.

A good way to visualize this concept is to think of a how window blinds work. To raise a blind, you have to pull two strings at the same time. Each string controls one side of the blind. If we imagine the blinds themselves to be your race performance and the strings to represent separate energy systems, you’ll find that you can only raise one side (pull one string) so far before you need to also begin pulling the other string. Your body works in much the same way.

As such, repeating a marathon every 16 weeks is certainly not going to give you enough time to train other energy systems like VO2max and running efficiency, especially if you rehash the same schedule and simply change the paces.

This trains your muscles and metabolic systems in the same exact way, which doesn’t ignite growth and development.

Ideal long-term training for the marathon

Ideally, you should plan on running one or two marathons a year – or three marathons in two years. This will enable you to properly recover, fully develop your aerobic potential,  and improve your other energy systems continually each year.

Here is what racing a Fall and Spring marathon in a one-year cycle might look like:

  • August through October/November – Marathon training (mileage, aerobic development and marathon specific workouts).
  • November/December – Recovery and build back into a good, general level of fitness. Include strength work and strides to stay healthy and to touch on speed.
  • January/February – Short 4-5 week speed phase. Race a few 5ks and do shorter, speed-oriented workouts while slowly building your mileage.
  • February through April/May – Marathon training
  • May/June – Recovery and build back into a good, general level of fitness. Include strength work and strides to stay healthy and to touch on speed.
  • July through September – Speed development or 5k/10k training. This will help you work on your speed and VO2max.
  • September through December – Half Marathon training. Another good change in stimulus and helps improve your top-end anaerobic threshold.
  • Now, you can run another Winter or Spring marathon and repeat the cycle.

This one-year cycle provides you one short and one longer opportunity to work on energy systems like VO2 max and speed development. Also, you have the chance to  train for races other than the marathon, which will have you primed for your best marathon results during your next training segment.

Can you run marathons closer together? Sure, and runners do all the time. Here’s an article on how to adjust your training to race well at multiple marathons in a short time span. However, if you’re looking for the optimal long-term marathon planning, keep this article in mind.

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6 Responses on “How Long Should You Wait Before Running Another Marathon

  1. I found an inconsistency between this article and the one linked in the VO2 link above, where you say that VO2 is not important for marathon runners… ???

    • Not an inconsistency. You can’t just work on marathon specific systems/workouts all the time. You need to increase your general level of fitness as well. See the window blinds example.

  2. Hi, I’ve just completed the Melbourne Marathon. I am doing my first ultra marathon in 3 months. It’s 56K. I am keen to start training asap as I only have 12 1/2 weeks of training left. How long should I wait before I run a 24k training run again. Also is it ok to go swimming this week when I’ve only just ran the marathon 2 days ago. Would appreaciate your help. Thanks.

  3. Im way too late on this. But, I would have said go for it. The article makes a lot of good points and I agree with them. At the very same time I am getting ready to run my 5th marathon in six weeks. (Only real problem is I just get over a cold before the next run and promptly get another cold because my immune system is always getting slammed).

    Give yourself enough time not to get ill and go for it! Cross training like swimming is also pretty easy on the body. (Its a hard activity but you should be able to do a bit of it!)

    I hope your 56K was a success! I am about to do a 100k in January. (My first too) but you get 16 hours so my strategy is to run 10-12km an hour the first two hours than take a run 6.25 KM walk as much as I can every hour. (You need to average a 6.25km to finish but I will have built a pocket in the first two hours of about 1 hour 30 minutes.)

    Good luck!

  4. Hey! I have been looking for an article for awhile about running multiple marathons in the span of each week.

    I know its possible now because I have officially run 4 marathons in 5 weeks. With two more in the next two weeks (6 in 7 weeks).

    But, there are legit no articles about that kind of running.

    What I have noticed so far is that im always sick for a few days.

    I have also found that instead of getting slower I am getting faster. Well, at least with the last one.

    Kanazawa – 4:44:54
    Ibibgawa (Mountain run – 4:50:24 (Expected to be even slower only about 40% who started even finished).
    Kobe – 4:53:?? – I had to use the bathroom over 12 times because I didnt see the running map and overconsumed water (They have like 30 stations and Im used to like 10 and thats part of my running strat but really screwed myself).
    Fuji marathon (Another hilly run) 4:28:37

    So, I was curious about the effects, training advice, etc for running back 2 back 2 back 2 back 2 back 2 back.

    But, seriously NO ONE writes about it.

  5. Another thing I have noticed is that now my legs feel like I havent ran at all the very next day which freaks me out.

    They hurt after Kanazawa – Ibigawa and stopped hurting after Kobe and after Fuji. It felt like I had just done a normal training run. Its getting freaky.

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