Brand: COROS
Category: Running Heart Rate Monitors
Recommended by Kevin Lara, Photographer — Truckee, California
Highlights: comfortable
The Coros Heart Rate Monitor is a cutting-edge fitness accessory designed to provide accurate heart rate tracking for athletes and fitness enthusiasts. With its advanced technology and user-friendly design, it empowers users to optimize their training and achieve their fitness goals. 1. Advanced optical sensor technology for precise heart rate measurement during workouts. 2. Bluetooth and ANT+ connectivity for seamless integration with various devices and fitness apps. 3. Lightweight and ergonomic design, ensuring comfort during extended use. 4. Long-lasting battery life, providing up to 30 hours of continuous monitoring on a single charge. 5. Water-resistant construction, making it suitable for use in all weather conditions and during swimming. 6. Real-time heart rate data display, allowing users to monitor their performance instantly. 7. Customizable training zones to help users tailor their workouts based on personal fitness levels. The Coros Heart Rate Monitor is ideal for athletes and fitness enthusiasts looking to enhance their training regimen. It excels in various environments, from outdoor runs to intense gym sessions, and is perfect for users of all skill levels. Whether you're preparing for a marathon or simply aiming to improve your overall fitness, this monitor provides the insights needed to maximize your performance year-round.
Price: $79
- Who it's for
- Runners, cyclists, and multi-sport athletes who want more accurate heart rate data than wrist-based optical sensors provide, without the hassle of a chest strap. Particularly well-suited to people with small wrists, those prone to cadence-lock issues, or anyone who has had bad experiences with chest strap chafing, wet contacts, or battery failures.
- What people are saying
- Hosts overwhelmingly praise comfort, accuracy, and how easy it is to forget it's on; the near-universal verdict is that it beats both chest straps and wrist-based HR. The one consistent caveat: optical sensing introduces a ~1-second delay, making it unreliable for very short or interval-start efforts where immediate feedback matters.
- Worth noting
- Battery life is frequently cited as strong (one host charges every ~1.5 weeks); it pairs via Bluetooth with Garmin watches and Concept 2 ergs, among others. Two flags from experienced users: optical HR can be unreliable over tattoos, and one coach notes units tend to last around 24 months.
Kevin Lara's review
A convenient heart rate monitor that fits perfectly around my upper arm. Extremely accurate for the most reliable heart rate data. Never even notice it!
Recommended by Kevin Lara, Photographer
Frequently asked questions
Who is the Heart Rate Monitor for?
Runners, cyclists, and multi-sport athletes who want more accurate heart rate data than wrist-based optical sensors provide, without the hassle of a chest strap. Particularly well-suited to people with small wrists, those prone to cadence-lock issues, or anyone who has had bad experiences with chest strap chafing, wet contacts, or battery failures.
What do experts say about the Heart Rate Monitor?
Hosts overwhelmingly praise comfort, accuracy, and how easy it is to forget it's on; the near-universal verdict is that it beats both chest straps and wrist-based HR. The one consistent caveat: optical sensing introduces a ~1-second delay, making it unreliable for very short or interval-start efforts where immediate feedback matters.
What should you know before buying the Heart Rate Monitor?
Battery life is frequently cited as strong (one host charges every ~1.5 weeks); it pairs via Bluetooth with Garmin watches and Concept 2 ergs, among others. Two flags from experienced users: optical HR can be unreliable over tattoos, and one coach notes units tend to last around 24 months.
What does Kevin Lara say about the Heart Rate Monitor?
A convenient heart rate monitor that fits perfectly around my upper arm. Extremely accurate for the most reliable heart rate data. Never even notice it!
Why does Kevin Lara recommend COROS?
Kevin Lara recommends the COROS Heart Rate Monitor for running heart rate monitors. A convenient heart rate monitor that fits perfectly around my upper arm. Extremely accurate for the most reliable heart rate data. Never even notice it!
Is the Heart Rate Monitor a good running heart rate monitor?
Yes — Kevin Lara recommends the Heart Rate Monitor by COROS as their running heart rate monitors pick. A convenient heart rate monitor that fits perfectly around my upper arm. Extremely accurate for the most reliable heart rate data. Never even notice it!
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What other hosts are saying
27 experts recommend the COROS Heart Rate Monitor.
Kilian Korth, Professional Trail Runner
Much more comfortable than a chest strap and very accurate.
Recommended in Cocodona 250 Kit + Fuel
John Bruno, Ultra trail-runner, ski mountaineer
Makes my watch just a bit more accurate! Long battery life and simple design.
Recommended in Trail running
Robyn Lesh, Pro Trail Running Athlete
SO comefy and effective. I got my coros arm band when I wanted a backup for my chest strap monitor. (like three years ago) And I never went back. Slight (~1sec) delay from chest strap (because the arm band is optical vs. detecting the heart's electrical activity) but the numbers line up and the arm band is so so much more comfortable that the slight delay is absolutely worth it.
Recommended in CCC by UTMB
James Sieber, Running & Strength Coach || Peak Pursuits Podcast Host
This arm band changed the Heart Rate game for me. Chest straps never worked, I felt constircted and chaffed. When Coros brought this band out, it allowed me to trust and use HR data again. The data seems very accurate, only with a small delay (meaning it's not reliable for very short efforts or immediate feedback starting an effort). This is the go-to option for people I coach. Only issues have been with tattoos, and they tend to last ~24 months.
Recommended in Gear
I’ve been using this HR monitor for over a year now and I love it because it doesn’t chafe like my previous chest strap HR monitor. It’s rechargeable and I only have to charge it every week and a half or so! It’s great for running, biking, yoga, paddle boarding, skinning.. the list goes on!
Recommended in Training Gear
Data,Data,Data
Recommended in Broken Arrow 46k
Klaire Rhodes, Professional Trail/Mountain Runner
The only HR monitor I'll actually remember to use!
Recommended in 10 Products I Actually Use Every Day
Data is incredibly important in this sport, and making sure you’re taking full advantage of it is huge.
Recommended in All the gear I trust on the daily!
Pretty much as accurate as the Polar H10 without the discomfort of wearing a chest strap. Forget I'm even wearing it.
Recommended in Javelina Jundred 100M
Best accuracy/comfort heart rate monitor I have used.
Recommended in 10 Products I Actually Use
Kat Callaway, World's Okayest Athlete
I wore chest strap HRMs for years and always had issues with them. I hated always having to keep the contacts wet, and it seems like every time I had to change a battery, the sensor would stop working. Enter the Coros armband HRM! So easy to pair with my Garmin and the PM5 monitors on my Concept 2 ergs, and it's optical so no contacts to worry about. Battery life is excellent, and I get a notification on my Garmin and my phone when it needs to be charged. Plus, it's super comfortable and the strap us easy to clean. I also love that it's rechargeable. I will never go back to using a chest strap again!
Recommended in 10 Products I Actually Use
Data based pacing 😎
Recommended in Mogollon Monster 100
Jenna Bensko, Amateur Trail Runner and Running Coach
Big data fan and this HRM is unmatched
Recommended in Broken Arrow 46k
Emi Stretton, What Gets Me Through the Miles
I use the COROS Heart Rate Monitor to get a more accurate picture of my effort, especially during long runs and ultra training. It helps me keep an eye on heart rate, effort and pacing so I can better understand what my body is actually doing—not just what my pace says.
Recommended in 10 Products I Actually Use
1,000x better than wearing a chest strap and also way more accurate than wrist based HR
Recommended in Pinhoti 100!
Anna Louden, Professional Trail Runner
I promise you won't even notice you're wearing it. I'm not really a data nerd when it comes to my running, but when it's this easy to collect HR date, why not?
Recommended in Everyday Faves
Wear on every run.
Recommended in The Items I ACTUALLY Use and Love!
Best on the market.
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Meg Cooke, Mountain Athlete, Materials Scientist
Nerds like me need data. And I will never awkwardly adjust a chest HR strap around a sports bra ever again thanks to this delightful product. The studies have been done, yes it's within the same margins of error as a chest strap. Just make the shift already and be a happier data nerd/accurate collector of HR data.
Recommended in Tech/Gadgets
Taelor Smith, Professional Faller of Trails
Most accurate heart rate. Is the best friend to my Garmin watch- they’re BFFLs
Recommended in 10+ Products I Actually Use
For the most accurate heart rate feedback, I use the Coros heart rate arm band. I forget I have it on when I'm racing, and end up with the best feedback when analyzing my effort.
Recommended in My 2025 AC100 Run
Julyssa Martinez, Distance Runner | Nutrition Student
Reliable heart rate sensing vs. your traditional watch
Recommended in Trail Running Essentials
It's really nice to have accurate heart rate data during training and races. Seamlessly connects to my garmin and it's so comfortable I forget I'm wearing it.
Recommended in Run Rabbit 100
This completely changed the game for me. It’s super accurate and lets me lock in my pacing effortlessly for workouts and recovery days. It is incredibly more accurate than relying on a wrist based heart rate.
Recommended in 10 Products I Actually Use
Sara Aranda, Trail/Ultra Coach, Athlete, Creative
I'm so glad I got myself this heart rate armband. It pairs easily with my watches, and as far as I can tell, the HR data is accurate. It is definitely far more accurate than just using my watch to read HR via the wrist (I have small wrists, and watches don't sit very flush). Using this armband ensures my watch doesn't "cadence-lock," which is a phenomenon that occurs when a watch interprets the impact of your running cadence as HR, skewing the workout data with incorrect values. Cadence lock can happen if a watch isn't flat against the skin or if your skin temperature drops too much due to cold weather. The COROS armband has avoided these issues altogether in my experience. The battery life is decently long, and the Bluetooth tech makes it easy to pair. I've enjoyed the orange color, as dirt and sweat won't show up as easily. I definitely recommend colors that won't highlight the grime of training! Plus, it's easy to detach the band for washing. I also like how relatively small/lightweight the HR monitor is.
Recommended in 10 Products I Actually Use
Johnny Brazas, Ultrarunner | Girl Dad | Endurance Athlete
Fantastic HR monitor. Easy to use, comfortable, great battery life, and real-time updates.
Recommended in 10 Products I Actually Use
