Hey, if you’re reading this and you’ve got POTS, I want you to know something right up front: running a marathon with this condition is tough as hell, but it’s not impossible. I’ve seen it happen, and I’ve lived pieces of it myself. Postural Orthostatic Tachycardia Syndrome messes with your autonomic nervous system in sneaky ways — heart racing when you stand up, dizziness that hits out of nowhere, crushing fatigue, blood pressure doing its own thing. A lot of days even walking to the mailbox feels like a workout. So yeah, the idea of training for 26.2 miles can feel completely out of reach at first. But here’s the truth I’ve learned after years of working with people who have POTS and chasing my own running goals: it doesn’t have to be all-or-nothing. With the right plan, patience, and a whole lot of listening to your body, you can build up to distances you once thought were off-limits.
The hardest part for most of us is something doctors call exercise intolerance. Your body basically throws a tantrum when you try to move too much or too fast. Standing, walking, running — any of it can spike your heart rate and leave you feeling like you’re about to pass out. It creates this awful cycle: you avoid exercise because it feels terrible, but the less you move, the worse the deconditioning gets and the harder everything becomes. The good news? Exercise is still one of the best long-term tools we have for managing POTS. You just can’t jump in like a healthy person would. The American College of Cardiology and specialists who actually get this condition recommend starting with stuff that keeps you mostly horizontal or seated at first — think recumbent bike, swimming, gentle yoga, or strength training while sitting down. No one-size-fits-all plan exists because POTS shows up differently for everyone. What works for your friend might wreck you, and that’s okay. The key is starting where your body actually says yes.
The mental side of this is just as real as the physical. When even basic stuff wipes you out, signing up for a marathon can feel ridiculous — like you’re setting yourself up for failure. I remember staring at my training plan one morning, heart already pounding just from the thought of it, and thinking “there’s no way.” Motivation comes and goes. Some days you’ll feel unstoppable; other days you’ll want to stay in bed. The shift that helped me (and a lot of the runners I coach) was accepting that this journey is slow on purpose. Progress isn’t linear. Setbacks aren’t signs you’re doing it wrong — they’re just part of living with POTS. Think of it like this: training for a marathon with this condition isn’t a sprint. It’s its own kind of marathon. You celebrate tiny wins — the day you walked 20 minutes without needing to sit down, the first time you ran for 90 seconds straight — because those are the bricks that build the whole thing.
Start stupidly small. Seriously. For a lot of us, the very first step is just walking. Not for speed, not for distance, but to rebuild trust with your body. I tell people to begin with short, flat walks whenever they feel okay — maybe 10–15 minutes — and slowly add time as it starts to feel manageable. Over weeks and months you might notice your heart rate doesn’t spike quite as high, dizziness eases up a bit, and your energy sticks around longer. Once that foundation is there, you can start playing with tiny run-walk intervals. One minute running, one minute walking. Then two minutes running. You stretch it out over months, not weeks. The goal isn’t to look like an elite runner. It’s to build tolerance so your body stops fighting you every time you ask it to move.
As you get stronger, longer distances start to feel possible. I’ve watched people go from barely managing a 5K to signing up for a half marathon and eventually a full one. The secret is patience with progression. Increase your long run by no more than 10–15% every couple of weeks. Have shorter, easier runs during the week. Throw in cross-training like Pilates or yoga to keep things interesting and help with core strength and balance. And always, always build in extra rest days because flare-ups happen. A “bad POTS day” isn’t a failure — it’s information. Listen to it.
Your training plan is going to look different from the ones you see online. It has to be flexible. One week might be amazing; the next you might need to cut everything in half. That’s normal. Build your long runs on weekends when you have more recovery time. Keep weekday runs short and doable. Make rest days non-negotiable. And when you do run, be smart about the practical stuff that actually helps:
- Respect your limits. If something feels off, stop. A short walk still counts as training.
- Never go alone, especially at first. Run with a friend, a group, or at least let someone know your route and have your phone with you.
- Hydrate like it’s your job. Water plus electrolytes — salt tabs, LMNT, whatever works for you — because dehydration makes everything worse.
- Figure out your trigger foods and cut back on alcohol. Some people find caffeine or heavy carbs set them off. Learn your body.
- Sleep is medicine. Poor sleep turns mild symptoms into a nightmare. Protect your rest.
- Wear compression socks or tights if they help. Good running shoes with support matter. Layer your clothes so you can adjust for temperature.
- Carry quick snacks — a few nuts, a date, or a gel — for longer efforts.
- After every run, cool down with your legs up for a few minutes. It helps blood flow and keeps the dizziness at bay.
Race day is its own beast. Forget about pace. This is about finishing on your terms. You might walk more than you run. You might take breaks at every aid station. That’s fine. Having someone you trust there — a friend, family member, or running buddy — makes a massive difference for both safety and morale. Crossing that finish line might take you longer than most people. It might look messy. But it will feel like the biggest victory because you did it while working with a body that doesn’t always cooperate. That’s real strength.
Here’s the part I want you to really hear: every single POTS journey is different. Some people can train pretty consistently with the right meds, compression, and hydration. Others deal with more severe symptoms and might need mobility aids or longer recovery periods. Don’t compare your chapter 3 to someone else’s chapter 20. Your progress is yours. Celebrate it without apology.
Running a marathon with POTS isn’t easy, but it’s absolutely possible for a lot of us. It takes medical guidance (please talk to your cardiologist or neurologist before you start anything new), a ton of patience, and a training plan that respects your reality instead of ignoring it. The real win isn’t just the medal at the end — it’s learning to move with your body instead of against it. It’s getting stronger on your own timeline. It’s proving to yourself that this condition sets limits, but it doesn’t get to write the whole story.
If you’re sitting there thinking “maybe someday,” let this be your sign. Start small today. One walk. One seated strength session. One tiny step forward. You don’t have to have it all figured out. You just have to begin. And when you eventually stand at that starting line — heart racing for all the right reasons — you’ll know every hard day was worth it.
You’ve got this. One mile, one flare-up, one comeback at a time.
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