Marathon Relay: How to Train for Your Leg

The marathon relay is the most honest way to run a city marathon without training for a marathon. Four runners split the 42.195 kilometres, each gets around 10.5 km — a leg that takes 40 to 70 minutes depending on pace and feels much closer to a 10K race than to a marathon. That is the appeal and at the same time the most common mistake: training for a relay like a marathon means training past the target. Treating it like a relaxed team outing means hitting the wall after six kilometres.

Why the relay is more than a compromise

The physiological demand of a relay leg sits closer to a 10K race than to a marathon. You run 40 to 70 minutes largely at or around your anaerobic threshold, with an oxygen demand you can only sustain for a limited time. The marathon runner spreads energy across three to four hours and spends most of it below threshold; the relay runner spends almost the entire leg at or above it. The requirements differ accordingly: the marathon needs volume and fat metabolism, the leg needs speed, economy and tolerance for sustained tempo.

That makes the relay an underrated entry point. Anyone who has never raced can get a taste of race day here without investing four months of build-up. Anyone who already runs marathons gets a speed stimulus they rarely set during marathon preparation. And for teams from a club, a company or a group of friends, the relay is the social entry into endurance sport that would never happen without this format. The organisational side — start times, exchange zones, transport — is more demanding than a solo start. That is the price for the team experience.

Leg distances are rarely fair

42.195 kilometres divided by four is 10.55 kilometres — that is the calculation on paper. In practice legs are almost never equal, because exchange zones are tied to infrastructure: underground exits, car parks, event tents. There are events with legs of 8, 10, 11 and 13 kilometres, and there are events where the final leg covers the full 12 kilometres including the only noticeable climb. Anyone who knows their leg trains differently from someone who only has an average number.

The practical consequence: look at the course map before you decide the team order. Three things matter more than pure distance.

• Elevation profile. A leg with 80 metres of climbing over 10 kilometres costs you two to three minutes compared to a flat leg of the same length. Whoever is strong uphill belongs on the hilly leg — not the fastest runner, the best-suited one.
• Surface and corners. Old-town sections with cobblestones, tight turnarounds and many 90-degree corners measurably slow you down. Add 20 to 40 seconds per kilometre for a technical leg, not because you are slow but because you cannot be fast.
• Line-up by type. The least experienced runner belongs on the first leg: the field is dense there, the pace is controlled from outside and there are the most spectators. The most experienced runner belongs on the last leg, where pace changes, fatigue and the finish sprint come together.

The 8-week plan for a 10.5 km leg

A relay leg does not need marathon training, but it does not need just two after-work loops either. A build-up of six to eight weeks with two to three runs per week is enough if you can already run 30 to 40 minutes continuously. Total volume sits at 25 to 40 kilometres per week — considerably less than a marathon build-up and easy to fit alongside strength training or cycling.

• The long easy run (once a week): 60 to 75 minutes at an even pace you could hold a conversation at. In the final weeks up to 80 minutes if your leg is longer than 11 kilometres. This run builds the base that makes race pace affordable in the first place.
• The tempo run (once a week): After 15 minutes of warm-up, three to five repetitions of 1,000 metres at your planned race pace with 90 seconds of jogging recovery. In weeks five and six one longer session: twice 2,000 metres at race pace. This is the stimulus that makes your leg fast.
• Strides (two to three times a week): Four to six strides of 20 seconds at the end of an easy run, with full recovery in between. They improve running economy and neuromuscular recruitment without producing fatigue — the cheapest performance stimulus in the entire plan.
• Week four is easier: Volume minus 30 percent, no intervals. Anyone who trains straight through eight weeks arrives on race day with a residue of fatigue that costs more over 10 kilometres than any missing session.

If you are using the relay as an entry into endurance sport and barely run yet, extend the build-up to ten or twelve weeks and start with the run-walk method. Running a leg in intervals is perfectly legitimate at a relay — the clock in the finish matters, not whether you ran the whole way. For everyone who wants to move up to the full distance afterwards, the 16-week marathon training plan is the next step.

The right pace for your leg

The most common question before a relay is about pace, and the most common answer is too optimistic. A leg is neither an easy run nor a half marathon — it sits in between, closer to a 10K race. The reliable rule of thumb: five to ten seconds per kilometre slower than your current 10K race pace. If you run 10 kilometres in 45 minutes, which is 4:30 per kilometre, plan 4:35 to 4:40 for the leg.

The reason for the surcharge is not the distance but the context: less-than-perfect preparation, an unfamiliar start time, waiting in the exchange zone, possibly afternoon heat, and a course profile you only know from the elevation chart. All of that together costs a few seconds per kilometre. Anyone who ignores the rule and goes out at 10K pace usually holds it for five kilometres and then falls apart — the classic relay mistake. How to establish your race pace in the first place, and why a current test run is worth more than any estimate, is covered in race time prediction.

Distribution matters as much as pace. The first kilometre should be deliberately slower than target — 10 to 15 seconds per kilometre, even though it feels wrong when the field runs past you. Kilometres two to seven proceed evenly at target pace with controlled breathing. From kilometre eight you may open up, and the last 800 metres are a gift because the finish is in sight. This negative split distribution typically gains 30 to 60 seconds over 10 kilometres compared with a start that is too fast — at identical fitness.

The exchange zone: the fourth discipline

The handover point is the underrated part of a relay. This is where your team loses or gains a minute — not through running ability but through process. Four things must be clarified beforehand, ideally the day before and again during the warm-up.

• Where exactly is the handover? The exchange zone is often 100 to 200 metres long. Agree on one exact point: the second tent on the left, the tree at the exit, the "Exchange 2" sign. "Somewhere in the zone" regularly costs half a minute of searching.
• Who carries what? Relay bib, timing chip and race number must be clearly assigned. At many events the chip travels with the bib; at others every runner has their own chip and times are added up. Clarify this before someone is hunting for a chip at the handover point.
• Timing the warm-up. Base your warm-up on your teammate's start time, not on the clock. Begin easy running 25 to 30 minutes before the expected handover, add two or three strides — and then keep moving. Standing still in the zone for 20 minutes means starting a tempo race on stiff legs.
• What happens afterwards? After the handover, do not stand in the zone blocking traffic. Out of the exchange area first, then drink, then cheer. Use bag drop for your belongings — do not carry more into the zone than you can wear.

One detail that is almost always forgotten: relay start times are staggered, and your own warm-up window depends on them. With a 9:00 start for the first runner, the fourth runner realistically starts around 12:30. Plan for that wait, with water, snacks, shade and a jacket — and push the warm-up back accordingly. How to bridge waiting time before a start in general is covered in the race day checklist.

Fuelling: less is more here

A leg of 40 to 70 minutes needs no fuelling strategy at all. The glycogen stores of an averagely trained runner last 90 to 120 minutes of effort — a gel after 30 minutes achieves nothing at this duration but adds gastrointestinal risk and a reach into your pocket. Eat a light, carbohydrate-based meal two to three hours before the start, drink 400 to 500 millilitres of water in the two hours before, and run your race.

There are three exceptions. First: heat — then you need a cup of water at every aid station, over your head as well. Second: a leg over 12 kilometres above 25 degrees, where an isotonic drink makes sense. Third: if you cannot eat breakfast because your stomach is closed from nerves, a gel or a banana belongs in the waiting period, not in the race. The full protocol for longer efforts is in carb loading and what to eat before running.

The team as a training factor

The real difference from a solo event is the social commitment — and that is not worthless from a training perspective. Someone who has agreed to meet three others shows up in bad weather when they would have stayed home alone. The accountability of a shared goal measurably raises training consistency, and over eight weeks consistency is the strongest predictor of the result. A good reason to fix the relay entry early and put the shared sessions firmly in the calendar.

The sensible split is by session type: once a week all four run the easy run together at their own pace — whoever is faster adds a loop at the end. The second session everyone does alone at their leg's target pace, because different race paces cannot sensibly be run together. If the group wants to come together beyond running itself, running groups and training partners has the organisational details. For company relays, corporate run training is worth a look as well, because the mix of beginners and sporty colleagues poses the same challenge there.

The eight most common mistakes

• Training like it is a marathon. Four months of build-up for a 45-minute race is wasted time. An 8-week build-up with speed stimuli delivers more on this distance.
• Starting too fast. The field pulls you along, the first kilometre is 20 seconds too quick, and the last three become torture. The deliberate brake at the start is the most important tactical decision of the day.
• Not knowing your own leg. Anyone who discovers on race day that their leg is 12 kilometres with a climb has trained wrong. Read the course map, study the elevation profile, ride or run it once if possible.
• Standing around in the exchange zone. Twenty minutes of waiting at 12 degrees makes stiff legs. Time the warm-up to your teammate's arrival and keep moving.
• Carrying fuel you do not need. Gels and bars on a 50-minute leg are unnecessary risk. Water at the aid stations is enough.
• New shoes on race day. A classic that happens at every race and is especially pointless at relay distances. New gear, new problems — see buying running shoes.
• Letting the team start without agreements. No shared goal, no role assignment, no agreed handover point — you then lose minutes on the course that you built up laboriously in training.
• Stopping dead after the handover. Two to three kilometres of very easy jogging speeds up recovery considerably compared with an abrupt stop after a tempo run.

What happens after the finish

A relay leg is a tempo run of 40 to 70 minutes — recovery accordingly takes two to four days, not two weeks. On race day itself, 10 to 15 minutes of easy jogging and fluids belong in the plan; the day after, a walk or 20 minutes of very easy running if the legs feel good. Quality sessions only make sense from day three onwards. If you are planning a marathon after the relay, do not place the relay in the last four weeks before the goal race — the speed stimulus is welcome, the race stress is not.

If the relay was your season highlight and you need a break afterwards, the deload week provides the framework. And anyone eyeing the full distance after the relay should not start the build-up immediately but insert four to six weeks of base training — the structure for that is in the overview of marathon training from base to goal race.

How Peakora plans relay preparation

Peakora plans short race goals as well: enter the relay as your goal race with your leg as the distance, and the engine builds the preparation from it — easy runs as the base, tempo runs at your leg's target pace and a quieter week before race day. Every session comes with a rationale in the plan, so you know why a session looks the way it does. The recovery monitor shows in parallel, via CTL, ATL and TSB, whether the load fits the goal — the three metrics for reading form and fatigue are explained in the training glossary (German).

For teams, one thing is especially practical: every runner gets their own plan for their own leg instead of everyone training to the same template. One needs 12 kilometres with climbing, the other 8 flat kilometres as a reserve — those are two different plans, even though both start at the same place on the same day.

Frequently asked questions