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Recovery
You can jog within a week. That does not mean you have recovered. Here is what is genuinely happening in your body after 26.2 miles, week by week, and how to come back stronger instead of digging a hole.
The Damage
Every marathon I have run has taken something different out of me, but the pattern underneath is always the same. You finish with thousands of small tears through the muscle fibres in your quads and calves, glycogen stores emptied out, a significant inflammatory response running, and in many cases some degree of dehydration and immune suppression on top.
Studies that track blood markers after a marathon show creatine kinase, an indicator of muscle damage, staying elevated for the best part of a week, and inflammatory markers such as C-reactive protein remaining raised for longer still. One study comparing running, cross-training and complete rest in the week after a marathon found neuromuscular performance was still depressed several days later regardless of what runners did.
"The legs come back long before the engine does. That gap is where most runners get themselves into trouble."
This is the crucial point. Within seven to ten days you will feel more or less normal on an easy jog. The soreness has gone, the stairs are fine again. But the deeper systemic fatigue, the hormonal disruption and the accumulated cost of a sixteen week build are still very much there. Feeling fine is not the same as being recovered.
Days 1 to 7
My advice to every runner I coach is the same. Take the week off running. Not because a gentle jog would hurt you, but because there is genuinely nothing to gain and a small amount to lose.
What actually helps in week one:
What does not help: sports massage in the first 48 hours when the tissue is still acutely inflamed, ice baths as a routine habit if your goal is adaptation, and any run that has a pace attached to it.
If you fuelled poorly on race day and paid for it in the closing miles, that is worth reviewing now while it is fresh. Our guides to marathon nutrition and hitting the wall are the two most useful things to read while you are sat with your feet up.
Days 8 to 21
From around day eight you can start running again, on three conditions. It is easy, it is short, and there is no session in it.
A reasonable shape for week two is three or four runs of 20 to 40 minutes, all conversational. Week three you can extend to five runs and push the longest out towards an hour. Still no intervals, no threshold, no parkrun that turns into a race by accident.
This is the phase where discipline pays. You will feel good. Your fitness is still very high, because a marathon build leaves you the fittest you have been all year, and it is tempting to cash that in on a fast 10k three weeks later. Some runners get away with it. Plenty pick up an achilles or a calf strain instead, because the tissue has not finished repairing even though the aerobic system is firing.
Keep everything in the genuinely easy zone. If you are not sure what that means in practice, our guide to zone 2 running explains how to find it and why it works.
Days 22 to 42
Now you can start training properly again. I would typically reintroduce one quality session in week four, usually something aerobic and controlled such as a steady run or a set of long, comfortable threshold reps, rather than anything short and sharp.
Week five you can add a second session. By week six most runners are back to a normal training week and can start building towards the next goal.
A rough guide many coaches use is one easy day per mile raced, so around 26 days, before full training resumes. It is crude but it lands in roughly the right place. Adjust it for how the race went. A runner who ran a controlled, well-executed marathon recovers faster than one who fell apart at 20 miles and walked the last four.
Warning Signs
The markers I look for with the runners I coach are simple and mostly not about running. Resting heart rate back to its normal range. Sleep back to normal. Genuine enthusiasm for training rather than obligation. Easy runs feeling easy at your usual easy pace. No lingering niggles that flare when you increase the load.
Signs you have come back too soon: a resting heart rate that stays five or more beats above normal, a persistent sore throat or run of minor illness, easy pace suddenly costing you far more effort than it should, or a niggle that appears in week three and never quite settles.
If two or more of those are present, take another easy week. It will cost you nothing over a season and might save you two months.
The Next Goal
A marathon build leaves you with an enormous aerobic base. The smart move is not to waste it, but not to spend it recklessly either. Three sensible options:
Race a shorter distance in six to eight weeks. A 10k or half marathon off marathon fitness, with a few weeks of speed work added, is often where runners produce a surprise PB.
Take a genuine off-season. Two to three weeks of unstructured running, no watch, no plan. If you have raced a spring marathon and want an autumn one, this is what makes the second build possible.
Go again in the autumn. If you finished feeling like there was more in you, a well-managed second marathon in the same year is very achievable. Just start the build from a rested body rather than a tired one.
If you ran a good-for-age qualifying time, this is also the moment to check the entry windows. Our guide to London Marathon Good for Age covers the current times and how the process works.
Common Questions
Most runners need three to four weeks before they are ready to train properly again, even though they can usually jog comfortably within a week. Blood markers of muscle damage and inflammation typically take one to two weeks to normalise, and the deeper fatigue takes longer still.
You can, but keep it very short and very easy, and only if you want to. Walking, swimming or cycling are equally good in that first week. Nothing you do in the seven days after a marathon will make you fitter, so the only question is whether it helps you feel better.
A parkrun or a low-key 10k is realistic after three to four weeks, but do not expect a personal best. For another marathon, eight to twelve weeks is a sensible minimum if you want to race it rather than just complete it.
Very. The post-marathon dip is one of the most common things runners describe and it has both a physiological and a psychological side. Months of structure and purpose end in a single afternoon. Having a loose next goal in mind before race day helps enormously.
A marathon creates a large inflammatory response and a period of elevated stress hormones, and many runners are also short on sleep and food around race weekend. Eating properly, sleeping well and avoiding a rush back into hard training in the first fortnight all reduce the risk.
Summary
Recovery from a marathon is not a week. It is closer to a month, and the fact that you feel fine after seven days is exactly what makes it so easy to get wrong. Take the first week off, spend two weeks running easy, reintroduce quality in week four, and you will arrive at your next block fresh, healthy and ready to build on what you have just done.
Every marathon programme we write has the recovery block built in from the start, not added as an afterthought. If you would like a coach managing that side of it for you, take a look at our coaching packages or get in touch.
Founder of JM Coaching, 2:08:45 marathon runner and Great Britain international. Coaching runners of all abilities since 2013. Read his full profile.
Structured builds with recovery planned in, written by coaches who have raced marathons at the highest level.
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