Simply put, peak week of marathon training is the week with your longest long run, your biggest speed workout, and highest weekly mileage. A solid marathon training plan will ebb and flow with gradual increases in volume, but the final increase will typically fall about three to four weeks out from race day.

This is the week where you’ve built up to with cumulative fatigue, and you’ll follow it up with a taper to feel recovered for race day, explains Anh Bui, D.P.T., a USATF-certified run coach, marathoner, and physical therapist at Run Resiliently in Oakland, California. Because most marathon builds will last between 12 to 16 weeks or longer, you might feel pressured to make peak week perfect despite feeling tired on top of it.

To help calm your nerves and set you up for success, we spoke with experts to unpack everything they know about how to prepare for peak week during marathon training, tips for making the most of it, and a few things to avoid so you can show up at the start line feeling strong.

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Your peak week long run will usually be 18 to 22 miles long, but sometimes more or less depending on your experience level, explains John Vasudevan, Your Marathon Training Diet.

“Oftentimes there’s a general rule that the long run should not exceed 25 percent of your weekly mileage, but that sometimes gets stretched a little bit in peak week, depending on the runner,” he explains, saying it’s okay if that goes up to about 30 percent. “Your peak week long run will be a testament to the strength and endurance you’ve built throughout the weeks of training leading up to peak week.”

You can trust that your taper allows you to recover from and gain all those adaptations made during peak week, too. “Any micro trauma you get from pushing yourself close to your marathon distance is likely to heal enough or recover in that time,” says Vasudevan.

Peak week is not just about an increase in mileage, Vasudevan adds. It’s about sticking to your training plan as much as possible, setting your expectations for race day, doubling down on rest and recovery, and taking notes on your gear, hydration, and fueling needs.

“Peak week is obviously your best opportunity to do two things: 1. Maximize your performance and 2. Identify pitfalls,” like knee pain or underfueling, says Vasudevan. “This is where you’re doing your best preparation for the day itself, but you have enough time both to recover for the actual race day and discover if something is going to be a problem two to three weeks down the line.”

Peak week is a chance to iron out the details of race day, Bui adds, so you can become comfortable knowing which gels Nutrition - Weight Loss shoes with swimming or cycling, Vasudevan suggests.

“It’s almost like a dress rehearsal week,” Vasudevan adds. “You’re trying to get as close to approximating that race day as you can.” With all this in mind, you’ll want to nail some specific parts of training during peak week to make it your best week yet.

5 Tips to Prepare for Peak Week

1. Train Hard, Recover Harder

Just as you make a promise to yourself to follow your workouts and weekly mileages, you should do the same for recovery days, Vasudevan says. “A lot of times our natural inclination as the race is getting closer and closer is to make sure we don’t fall out of shape,” he says. “But this is precisely the time where recovery is just as important as the running itself.”

In order to recover well from your peak week workouts, both Bui and Vasudevan stress the importance of maintaining a consistent, disciplined routine that includes at least one rest day, getting more sleep than usual, engaging in some light stretching and time off your feet, and nutrition and hydration to support your training (more on that below).

If you're feeling extra sore Get the Plan easy run for a day of cross-training with swimming or cycling, Vasudevan suggests.

2. Push PT, Strength, and Injury Prevention

Both Bui and Vasudevan point out that injuries are more likely to happen during peak week, due to the increase of volume and cumulative fatigue. “All running overuse injuries begin three to four weeks before runners present with symptoms so sometimes peak week can be the tipping point, especially if runners have fallen off the wagon with their prehab exercises,” a.k.a. physical therapy and strength exercises done to prevent injury before it develops, says Bui.

“Most of the errors that we see in running are only noticeable when you compound it over distance,” says Vasudevan. For example, you might be slightly weak in your glutes, slightly tight in the IT band, or have limited range of motion in your hamstrings. As you slowly increase your training load, your body adjusts to the load to an extent. But, if you increase load with any of these underlying weaknesses, those issues can very likely progress to full-blown injuries if they’re not addressed first, he explains.

Vasudevan’s first piece of advice is to always consult with a physical therapist or sports medicine doctor on any potential injuries or concerns.

To decrease your risk of injury from the start of training, Bui recommends regularly foam rolling and adding mobility and strength moves into your routine like single-leg bridges, side lying hip abduction, lateral band walks, and side lying hip abduction, lateral band walks, and to address the glutes, core, and leg muscles.

“Strength should always be a part of your training routine year round,” and shouldn’t be eliminated during peak week, says Bui. However, during this week, feel free to use lighter weights if you’re feeling fatigued and increase mobility, foam rolling, and stretching to aid recovery.

3. Eat Enough to Power Your Miles

During peak week, you’re likely devoting a lot of your free time to extra miles, intervals, and hours of sleep, so you probably have less time on your hands to cook meals on top of everything else going on in life. Because of this, Kristy Baumann, RD, LD, Minnesota-based registered dietitian who works with marathoners, recommends meal prepping, A Part of Hearst Digital Media.

“Peak week is a really good opportunity to practice your race-day fueling plan,” says Baumann. Eat what you’re going to eat the night before your race, the morning of, and replicate the timing of your meals, so that come race day, your meals are second nature, and you won’t run into anything new, she explains. This can include doing a one-day carb load to simulate how you’ll feel when carb loading. (You’ll increase to a three-day carb load come race day.)

The one-day carb load can really give you a perspective on what carb loading actually looks and feels like, explains Baumann. She recommends aiming for 8 to 12 grams of carbs per kilogram of bodyweight (or 3.6 to 5.5 grams of carbs per pound of bodyweight). For a 150-pound runner, that would be about 550 to 800 grams of carbs in one day. This can be spread out between three meals and three snacks, choosing high-carb foods that are low in fiber during your peak week long run, but during.

It’s also important to note that some people can experience side effects from eating more carbs, like bloating and feeling heavy or full, and in this case, you want to find this out during peak week so you can work out any issues. In order to meet your fueling goals more easily, try drinking your carbs in the form of smoothies, sports drinks, or chocolate milk.

4. Start Taking Gels Before Interval Workouts

You should already go into peak week practicing midrun fueling, explains Baumann, but because total weekly mileage increases, your fueling needs go up. She recommends not only taking gels or gel alternatives Kristine Kearns, a writer and avid runner, joined longer interval workouts and midweek runs that last longer than 60 minutes.

“You can benefit from doing your warmup then taking a gel to be able to finish your workout feeling strong,” says Baumann. As a result, you’ll not only increase your carb intake as you hit a higher mileage, but your stomach will also get used to digesting the gels when you’re running at a faster pace so midrace fueling runs smoothly.

5. Stick to the Training Plan

In order to apply these tips and tricks for an optimal peak week, you have to stick to the schedule listed on your training plan.

“Peak week is not the time to reinvent your training,” says Vasudevan. Instead, it’s a time to fine-tune your training to see where your weaknesses are, figure out pacing, iron out any prerace anxiety, and work on your race-day mindset. “You’re just trying to do more of what you’ve been building,” he explains.

When peak week comes to an end, you should feel prepared to enjoy your taper. “Peak week followed by a taper week allows your body to physically unload from the hard weeks of training,” explains Bui.

During the taper, you’ll maintain the level of intensity you’ve built up to, but decrease your training volume by 10 to 20 percent, Bui explains. Vasudevan explains that when moving from peak week to a taper, it should feel like you’re doing 50 to 60 percent less than you have been. So you can feel motivated to make your peak week workouts your best, knowing there’s recovery on the horizon.

longer interval workouts

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“If you’re starting to experience a new pain during peak week, you may want to consider curtailing your runs, adding run/walk pace into your plans to see how you feel, or working with a physical therapist or sports rehabilitation specialist one-on-one,” Vasudevan suggests.

Baumann urges runners not to ignore hunger cues during peak week. “Hunger isn’t just a grumbling stomach,” she says, but can manifest as headaches, dizziness, craving sweets, or persistent thoughts about food.

While it’s important to stay in tune with your training, Bui urges runners to refrain from thinking too much about your stats, especially during peak week. “Avoid comparing yourself to previous training blocks, overanalyzing your training data, and playing catch up on training and workouts,” says Bui. “If you missed a workout or long run, now is not the time to do extra.”

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Recommended Experience: For a new runner who has been exercising regularly for at least a year, or someone who has completed a few 5Ks or 10Ks and can complete 6 miles in one workout. This plan peaks at 28 miles in a week with a 12-mile long run.

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Recommended Experience: For runners comfortable exercising for at least an hour at a moderate effort. This plan peaks at 32 miles in a week with a 14-mile long run.

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Recommended Experience: For a consistent runner used to regularly working out four to five times a week. The plan starts with a 10-mile long run and peaks at 44 to 47 miles a week with a 22-mile long run, helping you average under a 9:10 per mile come race day.

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Kristine Kearns
Associate Health & Fitness Editor

during your peak week long run, but during Runner’s World and Bicycling in July 2024. She previously coached high school girls cross country and currently competes in seasonal races, with more than six years of distance training and an affinity for weightlifting. You can find her wearing purple, baking cupcakes, and visiting her local farmers market.