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Peloton's Ultimate Guide to Training for a Half Marathon

Here's what you need to know on your journey to completing 13.1.

By Liz DoupnikUpdated 10 July 2025

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Whether you’re preparing to run your first or fiftieth, training for a half marathon can be a satisfying challenge. With plenty to focus on, like acing your nutrition, incorporating recovery, and surviving your long runs, half marathon training often requires a comprehensive approach to help you stay injury-free while enjoying the process.  

“It’s a long way, but it’s also an achievable distance for runners,” says Peloton instructor Susie Chan. “Even if you’re new to running, you can definitely aim for a half marathon as an attainable goal.”

Clocking in at 13.1 miles, a half marathon calls for a robust program consisting of intentional training and recovery days. Regardless of whether you’re hoping to fine-tune your approach or are merely curious about how to get started, we’ve got you covered with this half marathon training guide.

Below, learn everything you need to know about how to train for a half marathon—including what to know about Peloton’s Road to Half Marathon program. 

How Long Is a Half Marathon?

As mentioned, a half marathon is 13.1 miles or 21 kilometers. As the name implies, it’s half the length of a full marathon, which is 26.2 miles or 42 kilometers. While all half marathons are the same distance, each race course is different. For example, some have rolling hills or gradual inclines, while others are flat and fast. As a result, your speed and finish time will likely vary depending on the course.

How Long Should You Train for a Half Marathon?

Well, it depends. Factors like your experience, fitness background, and lifestyle will impact how much time you can, and should, devote to preparing for a half marathon. But regardless if you’re a veteran or newbie, the focus should be on maintaining “consistency in training, nutrition, and recovery,” says Kevin Leathers, a UESCA-certified running coach and endurance nutrition coach, a USA Track & Field Level 1 coach, and head coach and founder of Can’t Stop Endurance.

That said, there are a handful of guidelines recommended by Leathers and Andrew Evans, co-founder of AZ Endurance and RRCA-certified running coach: 

  • Beginners: 16 Weeks. These are folks who’ve likely never participated in any type of race, or a race of this length. Alternatively, if you’re a slightly more seasoned runner but recovering from an injury, you might want to consider scaling back in training intensity and volume to accommodate your needs, depending on what your doctor suggests. “Start where you are and patiently build the long run over 16 weeks. Learn the basics of gear, pacing, and fueling,” advises Leathers, emphasizing that a beginner should mainly focus on crossing the finish line. To prepare for training (yes, it’s a thing), Evans suggests that beginner runners should strive to be able to run for 30 minutes before leaping into half marathon training. This will further prep your body for the demands of running a half marathon and the training it entails.

  • Intermediate: 12 Weeks. If you have a few half marathons under your belt and are itching to set a PR, an intermediate-level program is likely right for you, pending any health issues or injuries. If you’ve taken a break (but kept up moderate weekly runs), Evans says that intermediate runners might require about 12 weeks of training. For a more seamless transition into training, Leathers recommends keeping up long runs (capping them at 10 miles) before starting a training plan, so long as you feel physically and mentally recovered from your last race.

  • Advanced: 8-10 Weeks. Runners diligent in their training, recovery, nutrition, and yes, strength workouts, may be ready to focus on “improving performance, pacing, and setting personal bests,” explains Leathers. If you fall into this category and have kept up a solid aerobic base, you can probably stick to a plan that’s around eight to 10 weeks, says Evans. 

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What a Half Marathon Training Program Typically Looks Like

A half marathon training program is a comprehensive plan or calendar that details your daily, weekly, and monthly runs, cross-training workouts, and more. Below, check out more details of what to expect in your half marathon training program. Looking for more? Check out Peloton’s Road to Half Marathon program for a complete plan, on-demand workouts, coaching, and community.

Your Training Runs

Your half marathon training plan will include a breakdown of the runs or workouts on deck for the next day, week, and month. While it varies depending on your level, you’ll likely be running three to four times per week, Susie says. This may include an easy run, speed workout, or long run, for example. Further, each run should be assigned a duration, goal intensity or pace, and/or distance depending on the stage of the program. For example, in week one, you might complete a long run of six miles, versus a long run of nine miles on week eight. 

“Training intensity (how fast you run) and volume (the amount you run) are key components in any half marathon program,” says Evans. “Many runners find success in doing approximately 80 percent of their training at low intensity (think aerobic and recovery runs) and 20 percent at moderate to high intensity (tempo runs or interval workouts).”

Cross Training

Especially if you’re a beginner or intermediate runner, your half marathon training program will likely include some cross training days or sessions. These may decrease as the weeks progress to help boost your weekly running mileage. However, there’s nothing wrong with listening to your body and skipping a run to hit the bike or pool if you’re feeling extra tired or simply need a break.

Strength Training and Mobility

A strong runner is a prepared runner. While some runners might begrudge hitting the gym floor, strength training can help develop additional muscular endurance and power, while reinforcing productive movement patterns that can help you become an even more efficient runner. “It’s always really good to get in some cross training, strength, and stretching to complement the work you are doing running,” Susie says.

Psst: Don’t skimp on addressing lateral movements (like side lunges), as the muscles used in these exercises can help keep your hips strong and healthy. Other strength exercises you might frequently find in your half marathon training program include single-leg deadlifts, planks, and kettlebell swings, but it’s best to consult a certified coach or trainer to identify the best moves for you. Or, check out Peloton’s Strength for Runners Collection, which contains dozens of strength classes specifically designed to strengthen the muscles needed for running. 

Lastly, mobility work, or bodyweight movements that move joints and muscle groups through a wide range of motion, can help your body move at full capacity. When the body is at its most efficient, it’s less vulnerable to injuries and won’t expend as much energy.

Rest and Recovery Days 

It’s paramount to allow your body to adapt to the stress of half marathon training—and to do this, you need to rest. “Recovery is crucial,” Susie says. “This will help you be stronger on the next training run. Avoid the temptation to get more runs in, thinking this will help you. Trust the program and try to get more rest, especially after those long runs.” 

This not only includes taking off days from training for rest and recovery, but also getting enough sleep. Some athletes might find a full off day (or two or three) in their program, others might be advised to try active recovery methods, which might include some types of yoga or Pilates, foam rolling or infrared sauna, for example.

Man running outdoors training for a half marathon with Peloton running classes.

Common Types of Runs In a Half Marathon Training Program

When you’re training for a half marathon, you’ll likely complete a variety of training runs. These vary in type as much as they do in intention. For example, long, slow distance runs (aka long runs) are meant to steadily build your aerobic capacity that will sustain you through training and race day. Below, check out the types of runs you’ll likely encounter in a training program, no matter your experience level.

Easy Runs

These should comprise the majority of your weekly volume, or how many miles you run collectively each week, Leathers says. These runs slowly build aerobic endurance without putting additional strain on your body, which more intense and speed-focused workouts might. To find your aerobic pace, you can always try the “talk test,” by gabbing it up with your running buddy. If it feels too difficult to keep up the convo, you’re probably going too fast.

While, at times, easy runs might feel like a slog, they shouldn’t be neglected. “These runs build the stamina, mitochondria, and energy systems required to cover the half marathon distance,” says Leathers. “This is where we build the engine that supports the other challenging work and racing. Done correctly, a runner can consistently build a big aerobic engine,” he adds. What’s more, Leathers calls out keeping it slow and steady during these runs to avoid ramping up too quickly, which can lead to a litany of injuries or burnout.

Speed Work

Speed workouts typically focus on building muscular endurance and power to improve your running gait mechanics, pass competitors, and power through difficult sections of a course. Depending on your experience level and individual training program, these might vary between athletes; however, Leather advises that beginners skip speed workouts, directing their focus on aerobic runs as this can help reduce the risk of injury.

But, if you’re an intermediate or advanced runner, you’ll likely encounter a mixture of:

  • Intervals: Runs that consist of running short distances with programmed rest between reps and sets. These workouts can help you hone your running efficiency (meaning you waste less energy) while feeling comfier at faster paces, says Evans.

  • Tempo Runs: Tempo runs are workouts “performed at ‘comfortably uncomfortable’ paces to build muscular endurance and lactate threshold,” says Evans. Improving your lactate threshold enables you to run further, faster, with less strain on your body.

  • Fartleks: Swedish for “speed play,” Fartlek runs are “unstructured intervals that can help you master pacing,” Evans explains. Fartleks can also help to mimic the ebb and flow of a race, where you might need to speed up to catch a pace group, for example.

  • Hill Repeats: These runs often entail running a hill that’s steep, but not Mt. Everest, with programmed rest between sets and reps. Hill repeats can help build muscular power, Evans says, and replicate racecourses known to be especially hilly too. “If your half marathon has trails or hills in it, then do make sure you incorporate them into your training,” Susie notes.

Long Runs

As mentioned, long runs are a critical part of half marathon training. “You should always include one long run with the purpose of building your endurance,” Susie says. 

Your long runs will gradually lengthen throughout your training program, often adding on a mile or two each week, Susie says. While some advanced athletes might run longer than 13.1 miles for their final long run before a race, newer runners might log runs closer to 10 miles. It all depends on how your body is feeling and your goals.

“The long run builds the physical and mental stamina to cover the miles on race day. It provides the opportunity to practice hydration, nutrition, pacing, focus, and form,” Leathers says. They also serve as a testing ground to finalize your optimal long-run routine, he continues, saying: “Runners should practice everything, including gear, hydration, nutrition, pre-race dinner, and breakfast.” This will leave nothing to chance—meaning less opportunity for surprises—on race day.

Cross Training for a Half Marathon

Running can be tough on the body, even for the most seasoned runners. With its high-impact and repetitive motion, running inherently poses the risk of overuse injuries. However, cross training—or other forms of aerobic workouts like swimming or the elliptical—can help strengthen your muscles, build an aerobic base, and address any imbalances while giving your body a bit of a break. 

“Cross training enables you to increase your training volume by adding lower-impact activities such as cycling, swimming, or rowing, which lessens the chance of overuse injuries,” Evans says. “Furthermore, cross training adds variety to your routine, so you’re less likely to experience burnout. Lastly, there’s a convenience factor. With a busy schedule and two small children at home, there are some days when I simply can’t get outside for a run. Indoor equipment such as the Peloton Bike has helped me immensely throughout the years.”

How can you find the best cross-training workout for you? It’s “The one that you will do consistently,” says Leathers. While it’s best to consult with a certified running coach, physical therapist, or other certified fitness expert like a personal trainer, some runners find scheduling a cross-training day after their long run or other hard workout a way to switch gears mentally and take a breather before gearing up for training runs the rest of the week. 

Nutrition for Half Marathon Training

With all this training, it’s crucial to consider how you’re fueling before (and after) runs. “Think about how you’re going to fuel in the morning and give your body time to digest [that food],” Susie says. (She typically turns to oatmeal and peanut butter.)

Leathers emphasizes the importance of paying attention to what you consume 24 hours ahead of hitting the pavement. That includes thinking about what you’re eating the night before your race or a long training run, as well as what to eat right before your run. On race day, “You could really rely on your breakfast fuel a little deeper into the race,” Susie says.

Starting three hours ahead of a workout, Leathers recommends that you consume carbs, fluids, and electrolytes, avoiding any big meals or snacks right before you run. During a long run (or your race), he adds that consuming carbs, fluids, and electrolytes will help sustain you to the finish line. These can be found in a variety of gels and chews, so it’s wise to test out a bunch of types to see which works best with your stomach to avoid any discomfort on race day. For specific pointers, consider consulting a registered dietitian for personalized advice.

How to Set a Realistic Half Marathon Goal

So, you’re signed up for a half marathon. You have your program in hand and fresh shoes by the door. Only one thing: How can you figure out a realistic goal for your half marathon finish time, and how does that impact your workouts in your training plan?

For starters, let’s get one thing straight: You can walk up to the starting line of a half marathon with the only goal of finishing or enjoying your time on the course. In fact, that’s what Leathers says beginners should mainly focus on: crossing the finish line. 

If you’re a bit more advanced, “your training runs and how you’re finding them should inform your time goal,” Susie says. “It’s important to find the balance of being realistic and giving yourself something to work towards.” 

Rather than coming up with an ideal finish time, Evans recommends establishing a realistic pace that you could sustain for the duration of the race. You can use your times for the 5K and 10K distances to help get an idea of what might be doable for you. For example, Susie recommends incorporating a benchmark time trial at the beginning and midway through your training—like one of the distance-based classes offered on the Peloton Tread or in the Peloton App—to get an idea of where you’re pacing.

Ultimately, though, tackling a half marathon is no small feat and should be celebrated no matter how long it takes you to finish.

Half Marathon Training Tips

Your half marathon training needs are relatively subjective; however, there are a handful of recommendations to help you stay healthy and have fun along the way.

1. Enjoy the Process (and Mix It Up)

Running the same route day in, day out can start to feel monotonous. That’s where switching it up can come in handy. “There are almost certainly going to be days when your motivation wanes, so try to make your day-to-day training as enjoyable as possible. Pick fun routes, train with an encouraging partner, or reward yourself periodically with new running gear,” says Evans. Susie suggests playing with your speed workouts from week to week to keep things interesting, for example, doing hill repeats this week and an interval run the next.

2. Be Kind to Yourself

Bad days happen to even the best athletes. “Some weeks will feel tougher than others,” Susie says. “Some runs will just be hard, and you might feel that you’re not making progress, but know that this is what embarking on a training program feels like”—and you will get there if you stick to it. Positive self-talk and mindfulness can be incredible tools to remain focused, even through a rough run. “If you have a lackluster workout or two, remind yourself that the post-race sense of accomplishment is going to feel amazing,” says Evans.

3. Expect the Unexpected

No matter how much you plan and train, anything can happen on race day. “Bear in mind that weather is going to have a say,” Susie says. “The course terrain is going to have an impact, and there are so many things that can impact on your pace. So while it’s great to have a goal pace, you should always go into it with the attitude that, as long as you try, that’s enough. It’s important to be kind to yourself, no matter the outcome.” 

4. …But Set Yourself Up for Success

While you can’t predict what will happen on race day, you can mindfully prepare for the course, remain diligent on your recovery and strength training, and simply do your best on long runs. But more than that, listen to yourself. “Find the training plan that suits your current fitness and goals. Avoid falling into a training plan or training group that is not the right fit for you,” Leathers says. Susie has similar advice. “Don’t get too swept away or distracted by other people,” she says. “Focus on what you are doing and your progress.”

5. Don’t Do Anything New On Race Day

If you’ve run a race before, this is a refrain you’ve likely heard from countless runners, coaches, friends, and, yes, Peloton instructors: “Nothing new on race day,” Susie says. By the morning of the race, you’ve ideally figured out which foods, gels, and shoes are the best fit for you. “Use your long training runs to establish the best fueling and hydration plan for race day. Focus on the content and timing of carbohydrate, electrolyte, and water intake,” Leathers says.

This tip also applies to what you wear. “Don’t use some trainers just out of the box or try a brand new sports bra, and don’t try to eat anything different than your usual pre-run meal,” says Susie. “Opt for tried and trusted. If it works for you in training, it’ll work for you in the race.” 

6. Guard Against Overtraining

The start of training for a half marathon can feel like a thrill. And, after a few weeks of training, you might be completing workouts faster and feel unstoppable (as you should!). But don’t let this energy carry you away from your training plan. When athletes do too much, too soon, they become vulnerable to overtraining and overuse injuries like shin splints, tendonitis, or stress fractures, among others. “If you begin to dread the thought of working out on a consistent basis, or you’re consistently sore and exhausted, you should consider dialing back your training until you get the excitement back,” says Evans.

How to Recover After a Half Marathon

Wow—you really just did that. Once your half marathon is finished, the half marathon recovery begins. Depending on how you feel post-race, you might consider taking a few days off from movement. If that’s the case, you might want to check out an infrared sauna, which has been proven to provide recovery benefits to athletes. Research published in a 2022 issue of the journal Biology of Sport found that after 20 minutes in an infrared sauna, athletes reported lower muscle soreness than study participants who didn’t sit in a sauna.

Regardless of whether saunas are your thing, make an effort to enjoy nutritious meals complete with plenty of carbs, protein, and vegetables. Be sure to consume plenty of fluids to rehydrate too. If you’re looking for specific advice on what to eat before, during and after your race, consider meeting with a registered dietitian (there are plenty who specialize in endurance sports who can provide customized guidance).

And don’t skimp on the sleep, either. According to the American Council of Exercise (ACE), sleep is an integral part of muscular recovery. For example, quality sleep can help replenish hormones that impact your energy and help your muscles regenerate after exercise.

Susie suggests incorporating stretching and mobility work into your post-race routine. “I like to do yoga, because it includes core work and stretching all in one go,” she says. However, if a flow isn’t your thing, opt for a stretch class on the Peloton App.

Man training for a half marathon on a Peloton treadmill.

Can You Train for a Half Marathon On a Treadmill?

The short answer: Yes. “A treadmill can be a very useful tool for training. It eliminates many uncontrollable factors such as weather and darkness, and can help a runner stay consistent,” says Leathers. But while treadmills can be a valuable tool, they shouldn’t be a replacement, unless you’re planning to complete a half marathon on a treadmill. 

Susie is also a fan of using treadmills for race training. “They’re particularly good for the speed-focused training runs, as you can hop on and get the work done,” she says. She recommends making sure your treadmill is set at a minimum 1-percent incline to replicate running outside. 

“Ideally, you would [also] complete some race-specific workouts in an environment that is similar to the course as you get closer to the race,” Evans says. However, keep in mind that treadmills emphasize different muscle groups, particularly your calf muscles, so your gait mechanics will be slightly different.

Training for a Half Marathon with Peloton

If you’re ready to dive in, there’s good news: “Peloton’s Road to Half Marathon training program has it all laid out for you,” Susie says. Find it on the Peloton Tread or Tread+ or on the Peloton App under Programs or Collections. It includes 10 weeks of audio-only outdoor classes, including four days of running per week. 

To take care of your strength, mobility, and even mindfulness needs, look for the following types of classes on the Peloton App:

  • Focus Flow: For Runners

  • Strength for Runners

  • Core for Runners

  • Pre-Run Stretch

  • Post-Run Stretch

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This content is for informational and educational purposes only and does not constitute individualized advice. It is not intended to replace professional medical evaluation, diagnosis, or treatment. Seek the advice of your physician for questions you may have regarding your health or a medical condition. If you are having a medical emergency, call your physician or 911 immediately.

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Featured Peloton Instructor

Susie Chan

Susie, a four-time Marathon des Sables finisher and a world record-breaking treadmill runner, is one of the most recognisable faces in the British running community.

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