Starting to run doesn’t have to be overwhelming—small, consistent efforts like walk-run intervals build confidence and endurance.
The 5K is the ultimate starter race: accessible, effective, and a foundation for marathon success.
Training for shorter distances boosts speed and efficiency while reducing injury risks often linked to marathon training.
I ran a sub-3-hour marathon… without actually training for a marathon.
No constant 20-milers, no burning out and hating my training nonsense. My secret? I was trying to run my fastest 5K. Crazy, right? But that’s the magic of it.
Most people look at the 5K like it’s some fun run or warm-up for the real distances. Nah. The 5K is a beast of a race—short, intense, no room to zone out, and a great way to train and prepare you to crush those longer races.
And here’s another hot take that might trigger you: jumping straight into the marathon as your first race is lazy… mentally. Yeah, I said it. It’s skipping the real preparatory work—the speed, the technique, and the discipline of shorter distances.
In this episode, I’m gonna explain why training for shorter races like the 5K is the real way to run a faster marathon — so you can transform from a speed specialist into a marathon master without risking injury from endless slow miles.
You’ll Learn:
How 5K speed workouts turbocharge your marathon pace
Why this approach boosts your aerobic capacity for longer, slower races
The mental toughness hacks you pick up from running shorter, harder efforts
The 60% training overlap between a 5K and a marathon saves you time and injury risk
I’ll focus on two types of new runners: Beginner runners without a fitness background and beginner runners who do other sports, aka hybrid athletes.
I’m Daren DLake, Running and nutrition coach, Sub-3-hour marathoner, and 10-hour Ironman finisher.
Since 1996, I’ve been helping other self-coached runners, researching, and experimenting on how to better myself 1% each day.
Unlike other running brands offering quick fixes, the One Percent Better Runner transforms you through small, daily habit improvements to help you live an amazing run life.
Let’s get into it!
Part 1: What It Is
“So… why the 5K? Why not just slog through slow, long runs and call it a day? Simple: the 5K is the ultimate training ground. It’s short, but it packs a punch, forcing you to build every skill you’ll need for marathon success.
Here’s what makes it such a beast:
Speed Development: Training for a 5K is all about speed. It pushes your top-end pace, which directly translates to better times at slower paces (like your marathon pace).
Aerobic Capacity: Those shorter, more challenging efforts don’t just make you breathe harder—they improve your VO2 max and your body’s ability to use oxygen during intense exercise. The bigger your VO2 max, the longer and faster you can run before hitting a wall.
Mental Toughness: A 5K doesn’t give you time to overthink. It’s uncomfortable from start to finish, which is exactly the kind of mental grit you need to push through the final marathon miles.
Habit Formation: Tackling the 5K forces you to take small, consistent steps—literally. You’re not overwhelmed by mileage or time. It’s the 1% Better Runner philosophy in action: slice by slice, not the whole pie.
Training Overlap: Here’s a kicker—about 60% of marathon training overlaps with 5K training. Both require building a strong aerobic base, focusing on running economy, and developing mental resilience. So, by nailing your 5K prep, you’re already more than halfway prepared for marathon training.”
Part 2: How to Do the Thing
Alright, let’s get real-world practical.
How do you make the 5K actually work for your marathon
Let’s break it down, whether you’re starting from scratch with no fitness or already fit but new to running – shouts to the hybrid athletes out in the back!
For Complete Fitness Beginners:
Start with Walk-Run Intervals: Go for three sessions a week. Run for 1 minute, walk for 2. Gradually flip the ratio each week until you’re running 20-30 minutes straight.
Stay Consistent: Stay away from the polar extremes. No heros and no zeroes. Just show up each day with whatever you have (yes, that means rest on rest days if the training plan says so – remember, no heroes). Building a base is about patience—don’t try to rush this.
For Active Individuals New to Running:
Start with Easy Continuous Running: If you’re already fit, run 15-20 minutes at a leisurely pace 3 times a week. You should be able to chat without gasping.
Add Speed Work After Two Weeks: Throw in 4x400m intervals at a faster pace with equal rest. This workout is amazing for improving your VO2 max. Want to push it further? Gradually increase the reps and decrease the rest until you’re doing the classic 12x400m set. I’ve broken this down in detail in another episode—check the links below or in the show notes for the full breakdown.
Pick a Race Goal: Find a local 5K in 6-8 weeks. It gives you a target and keeps you motivated.
Part 3: Why It’s Important
So why should you care about all this? Why not just stick to marathon training plans
Here’s the run science truth – Training like this will help:
Training for shorter distances will improve your Running Economy: Running fast at short distances teaches your body how to run more efficiently. And efficiency is everything when you’re going 26.2 miles.
Training like this may also help with Injury Prevention: The gradual progression of 5K training builds strength and endurance without wrecking your body. You’re way less likely to end up injured compared to jumping into high-mileage plans.
Training for Shorter distance will Confidence Building: Crushing a 5K gives you real wins early on. Confidence isn’t some woo-woo thing—it’s fuel. It keeps you showing up.
It will build a proper training Endurance Foundation: The speed and strength you gain from 5K training are the same skills you’ll need for stamina in longer races.
The 5K is the foundation. Think of it like this: you’re building a marathoner, not just running a marathon.
The Finish Line
So,… your choice: keep churning out long, slow miles, hoping for a hail-mary miracle on race day, or take control and master the shorter distance races.
Train short, build speed, and watch how the marathon gets easier.
Listen below or watch above to the full episode or read the article summary to level up your run game.
Podcast & Video Timestamps
[00:00:00] – Breaking myths about starting running and the benefits of small steps.
[00:01:13] – Why 5K training is ideal for beginners and marathoners alike.
[00:02:41] – How to build consistency with walk-run intervals.
[00:03:13] – The efficiency of 5K training: less time, better results.
[00:04:00] – Tips for beginners to start running without burning out.
[00:05:32] – Why focusing on shorter races is better for injury prevention.
[00:06:41] – The mental toughness gained from shorter, intense efforts.
[00:07:15] – How 60% of marathon training overlaps with 5K preparation.
[00:08:00] – Building confidence through early wins in running.
[00:08:25] – Why starting small is key to long-term success as a run
How Training for a 5K Can Make You a Faster Marathoner Watch, listen and read the full episode here [00:00:00] This is me smashing a marathon in under three hours. And this is the crazy part. I never actually trained specifically for a marathon. Instead, I focused on a 5k. Yes, a 5k. And somehow ended up flying through 42. 2 kilometers. That’s 26. 2 miles for metrically sensitive folks out there. Faster than I ever thought was actually possible in this episode. [00:00:22] I’m going to explain why training for shorter races like the 5k is the real way. Yes. My real way, I think to run a faster marathon so you can transform from a speed specialist into a marathon master without risking injury from endless slow. Miles. I’ll be talking about how 5K speed workouts turbocharge your marathon pace, why this approach boosts your aerobic capacity for longer races, the mental toughness hacks you pick up from running shorter, harder efforts, and the 60 percent training overlap between the 5K and the marathon that saves you time and injury risk. [00:00:54] Oh, and I’m gonna focus on two types of runners. One, the beginner runner without a fitness background. So starting super [00:01:00] fresh and the beginner runners that also have a huge fitness background, do other sports very well, AKA hybrid athletes. I am Darren D. Lake running a nutrition coach, sub three hour marathoner and 10 hour Ironman finisher. [00:01:13] And since 1996, I’ve been helping other self coached runners researching and experimenting on how to better myself. 1 percent each day, unlike other running brands offering quick fixes and all those motivational quotes and all that stuff. We don’t do that. The 1 percent better runner transforms you through small daily habit improvements. [00:01:29] To help you live an amazing run life. Let’s get into it. What is actually training for a 5K when you want to do a marathon? So why the 5K? Why not slog through slow long runs and just call it a day? You just I, I did it simple. The 5K is the ultimate training ground. It’s short, but it packs a punch. Trite, but it’s true. [00:01:49] Forcing you to build every skill you need for math on success. Here’s what makes it such a beast. Speed development. Training for 5k is all about speed. It pushes your top end pace, which [00:02:00] directly translates to better times at slower paces, like your marathon pace, even half marathon aerobic capacity, the shorter, harder efforts. [00:02:07] Don’t just make you breathe harder. They improve your VO2 max, which is your body’s ability to use oxygen during intense exercise. A high VO2 max also helps you with the marathon, not as much as lactate threshold training, but it does help. Next thing, mental toughness. A 5k doesn’t give you time to overthink the 5k race. [00:02:24] At least it’s uncomfortable from start to finish, which is exactly the kind of mental grit that you need to push through the final marathon miles. Cause they are long and they are grindy and they burn. And the third area of what this whole 5k training is habit formation. Tackling the 5k forces you to take small, easy Consistent steps. [00:02:41] Literally, you’re not overwhelmed by mileage or time. It’s the 1 percent better runner philosophy in absolute action. 1 percent better. Here we go. Slice by slice, not the whole pie. We don’t eat the whole pie. You got to eat slice every day. And the last area of 5k focused training for the marathon is training overlap. [00:02:57] Something that I figured out over the last few [00:03:00] years. Here is something that’s interesting. About 60 percent of marathon training. overlaps with 5k training, especially in that beginning phase, especially if you do a long base phase and you do a start of the race period phase, both require building a strong aerobic base. [00:03:13] The marathon is 99, if not a hundred percent aerobic. So you’re using oxygen. Both require building a strong aerobic base, focusing on running economy, which is how efficient you are with your stride and your steps and all that and developing mental resilience. Gotta have it for all those races. So by nailing all that 5k preparation, you’re already more than halfway prepared for marathon training. [00:03:36] How to do the actual 5k training. All right, let’s get real world practical. How do you make the 5k actually work for your marathon? Let’s break it down. Whether you started from scratch with no fitness already fit, but new to running shouts to all those hybrid athletes out in the back. For complete fitness beginners. [00:03:54] Here you go. Start with walk run intervals. Go for three sessions a week. Run one minute. [00:04:00] Walk for two. Very easy. Gradually flip the ratio. So it’s run two minutes, walk for one, run four minutes, five minutes, walk for one, and keep doing that until you’re running 20 to 30 minutes straight. Number two, stay consistent. [00:04:12] Stay away from the polar extremes, no heroes and no zeros. Just show up each day with whatever you have. Yes. That means rest on rest days and recover when you’re supposed to recover. If the training plan says so remember no heroes, no heroes all the way over here. No zeros all the way over here. Stay in the middle, super consistent, building a basis about patience. [00:04:29] Do not try to rush this for active people that are new to running. So people with fitness one, start with easy, continuous running. If you’re already fit, run 15 to 20 minutes at an easy pace, three times a week. You should be able to chat without gasping. Number two, add speed work after two weeks, throw in four by 400 meter intervals at a faster pace, which is close to probably your 5k pace or put it through a calculator. [00:04:50] The VDOT calculator is a great tool. This workout is amazing for improving your VO2 max. Want to push it further? Gradually increase the reps. So the actual amount of [00:05:00] 400 you do and decrease the rest. So the time in between the 400s until you’re doing the classic 12 by 400 meter set that I actually have broken down in another episode, it will be either. [00:05:11] Appear or appear somewhere there and you can check that out. Um, there’s also links in the show notes If you’re listening or a video description below to how to do a 12 by 400 meter set It works for everyone from the 5k 1500 800. I didn’t 800 meters all the way up to marathon I’d even say ultra early on your season and the last thing number three pick a race goal Find a local 5k in six to eight weeks. [00:05:32] That is about to happen And it gives you a target, so it keeps you motivated. Or you know what, if you like it, you got a local park run in your area. Use this to actually run a fast 5k, which will give you a fast marathon. So a bonus for everyone. While I’m here, I’m sure you’re like, yo, Darren, how do I actually do this in my own life? [00:05:50] Great questions, get great answers and solutions. I’ve put together a 30 day base training plan and habits guide. So it’s like your own personal running therapist for free 99 [00:06:00] Kanye reference, old school. Yes, it’s free. Cause I love you. I love YouTube. And I want to help everyone out there run their best marathons. [00:06:06] Just scan the QR code. It should be probably here. I don’t know. Either one of those hit the link in the show notes or the link in the video description below show notes. If you’re listening, just tap it in your podcast player app. If you like that and want more or don’t like it and want something else, there’s also a bonus bonus, bonus 5k training plan bundled in there. [00:06:24] Yes. Two for one. Oh, and you should also subscribe, like, and share this video out to all the runners out there that think the marathon is the only race in the world. You got to tell them that it’s not the 5k is let’s get back into it. Why this type of training is important. All right. So why should you care about all this? [00:06:41] Why not just stick to marathon training plans? Right. Going to answer the hater in the back of the room right now. Okay. Here’s the run science truth. Training like this will help training for shorter distances while improve your running economy. Running fast at short distances teaches your body how to run more efficiently and efficiency is everything when you’re going 42. [00:06:58] 2 Ks or 26. 2 miles for [00:07:00] you Americans out there, get on the metric system. Uh, another thing is training like this may also help with injury prevention. The gradual progression of 5K training builds strength and endurance without wrecking your body. You’re way less likely to end up injured compared to jumping into high mileage plans. [00:07:15] I promise you, I’ve seen way less people doing 5K races every few weeks and getting injured versus people trying to run a marathon. over and over again, three or four times a year and getting injured. One happens more than the other. And I’m sure you can pretty much tell which one. The third thing, training for shorter distances will build confidence. [00:07:31] Crushing a 5k gives you real wins early on. That’s what we want. Confidence isn’t some like super woo woo sages and crystals sort of thing. It’s legit fuel. Psychology has said that this is a thing. All the habits, training, all the habits, guides, and books say you need the small wins. It keeps you showing up. [00:07:48] And the last thing, it will build a proper training endurance foundation, which is what you need. The speed and strength you gain from 5k training are the same skills that you need for stamina in all those longer races, half [00:08:00] marathon, marathon, ultras, etc. The 5k is the foundation. Think of it like this. [00:08:04] You’re building a marathoner. Not just running a marathon gonna say that again. You’re building a marathoner in yourself. Not just running a marathon So the choice is yours keep churning out long slow miles hoping for a Hail Mary miracle on race day For your marathon or take absolute control and master the shorter distance races. [00:08:25] I know there’s a hard one to swallow it worked for me I’ve seen it work for others and I’ve heard a lot of expert running coaches and running science people actually chatter this You No, one’s actually said it out loud. I’m going to say it out loud, or at least I haven’t heard anyone say it out loud. [00:08:37] Train short, build speed and watch how the marathon gets easier. Drop your thoughts in the comments or your best times. Uh, hit me up. If you’re listening, talk at pod paste or on Instagram, D Lake creates. Do you agree with me or not? I want all the love and I want all the hate. Thanks for rocking with me. [00:08:54] Time, time, time. I’m obsessed with it as it’s the one thing we can’t make more of, but ironically, we, as humans, [00:09:00] we made the whole concept of time. Thanks for giving us your time. By listening, watching, or reading this, we love helping runners get 1 percent better each day, one step at a time, and can only reach more runners by people like you sharing this out to runners like you. [00:09:13] As I might have mentioned earlier in the episode, if you haven’t already, you can get a free step by step 30 day base training and habits guide to getting 100 1 percent better in running and life each day by signing up for our email newsletter. Unlike other running videos and podcasts, we are not about the quick hack and fluffy motivational quotes. [00:09:31] Instead, the 1 percent better runner focuses on how small daily habits ripple into broader life success. Helping runners perform better on and off the road or the trail or the track, wherever you want to be doing your workouts, all in five minutes per week. This episode and all this content is produced in Sydney, Australia, and I’d like to acknowledge the Gadigal of the Eora Nation, who are the traditional indigenous custodians of this land. [00:09:55] Much, much, much respects. If you want to contact us about anything, email talk at [00:10:00] dlakecreates. com. We’re also on the socials, mainly Instagram and Strava right now. Just search One Better Run or D Lake Runs. Small steps now, lifelong impact later. Peace.