Best heart rate monitors of 2025: Never miss a beat, on and off the bike

When it comes to exercising, your heart rate is the gold-standard metric to uncover how hard you're pushing. It tells you whether you're working aerobically or anaerobically, how your body is reacting to the effort, when you've recovered ready to go again, and much more. 

But the best heart rate monitors aren't all created equal. For cyclists, the most popular are chest strap heart rate monitors, which, at their most basic, need to capture your beats per minute (BPM) and transmit it via Bluetooth or ANT+ to your bike computer, smartwatch or smartphone to be viewed in real-time and recorded for later analysis.

There are forearm-based heart rate monitors, wrist-based heart rate monitors, smartwatches, fitness trackers and even headphones that can track your BPM too, but generally speaking, chest straps are the most accurate. 

They use electrodes against your skin to monitor the electrical activity, whereas most other heart rate monitors are 'optical', meaning they send a ray of light into your skin and measure the colour change as blood passes by with each beat. 

Here at Cyclingnews, we've tested dozens of heart rate monitors over the past three years, including chest straps, smartwatches, fitness trackers, and more. 

This guide will outline the ones that performed best in our tests and impressed us the most. That includes the ones that offered the most consistently accurate results, the best battery life, the ones that did the basics really well for a great price, the ones that offered clever extra features, the most comfortable and more. 

Best heart rate monitors: Quick list

Written and tested by

Written and tested by

Josh Croxton

Heart rate has been a fundamental aspect of my training for racing, and over the years, I have used countless heart rate monitors. When evaluating these devices, I prioritize accuracy and usability, they need to provide valuable training data and be compatible with a variety of training tools, ranging from GPS computers to indoor smart trainers.

Best heart rate monitors available today

Best heart rate monitor for cycling

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Polar claims the H10 is the most accurate on the market - accurate to +/- one millisecond - thanks to a third electrode and silicone grippers to keep it in place. In over two years of testing, I haven't had a single issue so cannot refute those claims, and our expert reviewer had no complaints either. With that said, given most other chest straps here have performed similarly well, I wouldn't buy the H10 for that reason alone. 

The reason I would buy it is the super-simple adjustment and extremely comfortable, secure fit. The added bonus of silicone grippers is that you can run it looser than usual without it slipping, and while I don't personally suffer much from chest strap discomfort, I know it's an issue that plagues a few. Swapping to an optical sensor such as a smartwatch is one option, but the downside to that is a reduction in the accuracy of your data, which is common with optical sensors. 

Comfort aside, the H10 is entirely waterproof, can be worn while swimming and can also record your heart rate variability — though you'll need to use it in combination with one of the brand's smartwatches to take advantage. 

It also offers on-device storage, albeit with memory space for just one training session. Otherwise, it can connect to two concurrent devices with Bluetooth, and it uses a CR2025 (2.5mm thick) battery, although some may prefer a rechargeable unit like the Wahoo Trackr at this pricepoint.

Read our full Polar H10 heart rate monitor review here. 

Best value heart rate monitor

The Polar H9 doesn't come with any added bells or whistles like onboard memory or accelerometers and there are heart rate monitors with better battery life. Still, the Polar H9 is my favourite heart rate monitor for 'basic function', ie monitoring my heart rate while cycling or running, and the reasons are as follows: 

Firstly, my testing has shown the Polar H9 provides reliable, accurate and consistent data whether testing outdoors or indoors. Secondly, while the Garmin HRM Dual is equally accurate, it is a little more expensive again. Thirdly, it's a darn sight easier to adjust the strap on the H9 than on the HRM Dual, and finally, when it comes time to change the battery, the H9 can be done in seconds (just prize away the flap with a flathead screwdriver or similarly-shaped utensil) while the HRM Dual requires a tiny screwdriver to remove four small screws. 

To cap it off, it's comfortable and stays secure, so unless you're specifically chasing a truly budget price, a huge battery, or need the added features, this is the best heart rate monitor for you.

Best rechargeable heart rate monitor

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Wahoo replaced its Tickr and Tickr X range with the latest Trackr heart rate monitor. The new Trackr heart rate pod may look similar to the outgoing models, however, Wahoo has made several updates including a new strap, HRV recording and replacing the venerable coin battery with a rechargeable battery.

While the Trackr takes a hit in battery life compared to coin-powered heart rate monitors, it still features 100 hours of battery life. No longer do you need to keep a stash of coin cell batteries ready for when the battery runs out, instead the Trackr charges using a magnetic charger that connects to the underside of the pod. The IPX7 waterproofing should also be more reliable now as the Trackr no longer needs to be opened up to change the battery which could in turn damage the sealing over time.

Wahoo Tickr straps of the past didn't have the best track record for durability but it looks as though Wahoo has rectified this with the new Trackr. Instead of using the connector points to mount the pod to the strap which I found led to corrosion issues, the Trackr pod is now mounted in the centre of the strap and we expect this to improve accuracy and longevity.

Adjustment of the strap is a fairly straightforward affair, too, but it does require both hands. It holds pretty well though, so should be a one-time job. 

For ease of use, the Trackr can simultaneously connect to three devices, which is particularly useful for indoor cycling, as it enables you to control your headwind fan whilst riding on Zwift via your laptop, or track your heart rate via a cycling computer and a phone at the same time. 

Best heart rate monitor for battery life

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The HRM Dual is Garmin's answer to budget heart rate tracking, but its retail price is still more expensive than Polar's H9. 

With that said, it can often be found discounted, which increases its appeal. Where it stands out is with its claimed 3.5-year battery life (assuming an hour per day on average) and the ability to monitor heart rate variability (when paired with an appropriate app). 

Beyond that, the HRM Dual is a reasonably basic heart rate monitor, so it doesn't come with the bells and whistles of onboard memory and swim/run dynamics. Its construction also leaves a little to be desired, as the three-part adjustment system is unnecessarily complex to use. This is frustrating because Garmin clearly knows how to do it well, as the more expensive HRM Pro is by far the easiest to adjust on this list. 

Furthermore, it's a good job the battery life is so good because when it comes to replacing the CR2032 inside, there are four tiny screws which are fiddly and easy to damage. And that assumes you have a screwdriver small enough in the first place since it doesn't come with one. 

Unless you're specifically after huge battery life, then in my opinion, the Polar H9 is a better choice at their respective recommended retail prices. I'd buy it at a discount though, and given that's a common occurrence, I've included it in the list. 

Read our full Garmin HRM Dual heart rate monitor review here.

Best heart rate monitor for Zwift

The 4iiii Viiiiva is soon to be discontinued, but as long as it's still available it is my pick as the best heart rate monitor for Zwift for a couple of reasons. The first of those is its ability to act as an ANT+ to Bluetooth bridge. Most smart trainers, power meters and heart rate monitors these days can work with Bluetooth, but too many connections can cause dropouts, and some devices such as Apple TVs and cheaper laptops have a limit on the number they can work with at one time. Running the smart trainer and power meter via ANT+ to your heart rate monitor, and then transmitting all three data streams via Bluetooth to your laptop frees up valuable Bluetooth channels so you can listen to music through your headphones, or use your wireless keyboard to talk to your fellow Zwifters!

The second reason is that it also stores up to 65 hours of your ride data, so that if your file corrupts, you can recover it. Nobody likes to lose their data, but if you race on Zwift in races where dual recording is required, it could save you bragging rights or even prize money. 

Beyond those two key USPs, the Viiiiva is a decent all-rounder too. I've not had it long enough to get through 160 hours of riding, but reassuringly I'm still on the first battery. I've not seen a single power dropout yet, both when connected to an Apple Watch, an iPhone, a bike computer, TrainerRoad and Zwift. 

Best heart rate monitor for running

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The HRM Pro Plus is the best heart rate monitor in Garmin's range, with both ANT+ and (unlike the brand's HRM-Run or Swim) Bluetooth compatibility. 

It's the highest-priced chest strap on this list, but it does come with a long list of added features. Whether you actually need them is a question you'll need to ask yourself. 

It features onboard memory, and will automatically measure your heart rate data and then push it to your device when you next connect it to Garmin Connect. For cyclists, it'll easily pair with your Zwift device or any brand of cycling computer. And for dedicated runners, it can also track detailed running metrics such as ground contact time, stride length and more. These are seriously impressive metrics, but you do need one of Garmin's smartwatches to take advantage of some, you can't access them all via a smartphone. 

The strap is by far the easiest on this list to adjust; it's a one-handed affair and it doesn't self-loosen over time, it also stays put without being worn too tightly.

Like many others here, the battery is a CR2032 coin cell and Garmin claims it will last around 12 months, with an hour's use per day, which equates to 365 hours of training time between changes. My personal testing saw a lifespan of around half this, but integrating the heart rate monitor into my daily training regime alongside all the others in this list is more anecdote than science. 

Thankfully, the battery change on the HRM Pro Plus is a much more straightforward affair than it was on the older HRM Pro. 

The pod itself cannot be removed from the strap, which means washing needs to be done by hand, rather than through the washing machine, and Garmin suggests you do that after seven workouts or after every pool swim. For those planning on swimming a lot, the HRM-Swim does come with a wider strap, which helps it stay put better, especially useful for those not wearing a wetsuit, swimsuit or triathlon vest over the top. 

Read our full Garmin HRM Pro Plus heart rate monitor review here.

Best heart rate monitor for 24-hour tracking

Buying a Whoop 4.0 requires a monthly subscription that not only gives you the wrist strap itself but access to Whoop's extensive heart rate, respiratory rate, blood oxygen and skin-temperature monitoring app. Whoop's premise is built primarily on heart rate variability (HRV), which is basically the variation in time between each of your heart's beats, measured in milliseconds. 

The theory is that a higher HRV (when compared to your individual average) means you are fresher, or more recovered. Wear the Whoop 24/7 and it will collect this data alongside your activities to monitor your strain vs recovery (incl. sleep) and provide guidance on how to improve. It's a seriously deep data dive that most people won't need, but for committed athletes looking to optimise their life around training, it could be the tool to unlock the next level of performance. 

It's clever in that the charger is a portable slide-on battery pack that you wear, and the device itself is waterproof enough to be worn in the pool, the shower, or the sea so you'll never lose a moment's data. However, bear in mind charging is necessary every three to four days. Using the app, you can even relay the heart rate to third-party devices such as cycling computers, should you want to avoid using a chest strap at the same time, and when your Whoop detects an activity, it will not only automatically figure out if it was a ride, a run, mountain biking or more (which it's really good at) and it can then be synced to Strava, Training Peaks or Apple Health. 

You need to ensure it's tight against the skin for consistent results, but in my testing, I've found it to be accurate enough for its purpose of tracking overall fatigue and freshness, even if the beat-by-beat measurement might be less perfect than chest straps during exercise. 

Read our full Whoop 4.0 review here.

Best heart rate monitor watch

In fairness, for the pure heart rate monitor functionality, most modern smartwatches will do what you need. But if you're looking for one of the best smartwatches, then the Garmin Forerunner 965 has been crowned the best cycling watch by our experts, and so I've included it here as the leftfield option. 

It offers every function you need from an everyday smartwatch, such as the time, alarms, notifications, contactless pay, and on-device Spotify music, alongside GPS tracking and workout metrics such as Vo2 Max, pace, stride length and so on. You can even pair it with the HRM Pro Plus above for super thorough running metrics, but its an expensive pairing that only the most committed athletes will benefit from.

Importantly, I personally prefer the Apple smartwatches over the Garmin ecosystem, and if like me you're not all that interested in checking your vertical oscillation when running, and (importantly) you own an iPhone, then the Apple range might be your pick too. However, the battery life on the Garmin watches far exceed Apple. The Garmin also works equally well no matter your choice of phone, while the Apple Watches are, naturally, slightly more integrated with iPhones. 

Regardless of your choice, the main thing they both offer is the ability and convenience to wear them 24-7. They'll give you a heads-up if your heart rate starts beating an irregular rhythm, and they'll be on hand - almost literally - whenever you start your ride. 

Also consider

While the list above is a pretty exhaustive list of the heart rate monitors we'd be happy to recommend for Cyclingnews readers to buy, there are a few others we've tested recently that we like, but not quite enough to make it into the guide. 

The first of these is the Garmin HRM-Fit. Designed for women, it is made to clip onto the underband of a sports bra, instead of wrapping around the torso. It's an excellent choice for those looking to avoid potential chafing or rubbing which can come when using a standard chest strap, but at £139.99/$149.99, the price is too steep. It has similar features to the HRM-Pro Plus, but cannot be worn swimming, and it seems unfair to ask women to pay more for less tech.

The next is the Wahoo Tickr Fit. This is a fore-arm based optical heart rate sensor that's a good option for those who don't want to wear a full chest strap. If you have a smartwatch with a heart rate monitor built in, then that's probably the optimal solution, but if you find chest straps uncomfortable or restrictive, then this would be our pick. Another option here though is the simply-titled Coros Heart Rate Monitor. This too is worn on the forearm, costs the same and offers very similar functionality. The Coros promises a longer life between charges, while the Tickr Fit boasts ANT+ connectivity and a spare strap. 

How to choose a heart rate monitor

FAQ

How do we test the best heart rate monitors?

Our testing for this guide to the best heart rate monitors has been an ongoing process for almost three years. Each test starts with an unboxing, during which we make a note of the packaging for its eco-friendliness. All brands use some form of plastic in their packaging, but I usually find Wahoo is the best in this regard. 

For chest straps, I then read the care instructions and make a note of washing recommendations, before removing the battery cover in a trial run battery swap, noting the difficulty. Next up comes the adjustment, and working out how easy - or difficult - it is to fit the strap. On the chest straps, Garmin's HRM Pro Plus wins this, with close second-places coming to both Polar options, although the ease of fitting the HRM-Fit onto the understrap of a sports bra is something our women testers have applauded too. 

Next, I research the claimed features and qualities of each heart rate monitor and try out these features during testing to confirm they do what they should, and to experience how said feature might benefit a user's workout. 

In the absence of having a doctor with an ECG machine on hand for all of my workouts, I improvised a way to confirm accurate readings. Throughout testing, I spend a time wearing three (sometimes four) heart rate monitors for my workouts - two chest straps and one or two wrist straps - depending on what I'm testing. 

This compares the readings for each heart rate monitor against at least two others and lets me weed out any devices with inaccurate data or poor connectivity. As is widely accepted, the chest straps performed best here, while optical wrist sensors tended to struggle to keep up with quick changes up or down, especially when running or mountain biking, as this shakes the wrists more than indoor cycling. 

It's fair to say none of the chest straps performed specifically badly in this regard, and when sufficiently tight, the optical units are pretty good too, so the main differentiator in accuracy was actually how often they dropped connection. This is a problem I occasionally experienced with Wahoo's older entry-level Tickr, but the Trackr has been great since it launched in 2024. It was a particular problem with cheap heart rate monitors bought on Amazon, and hence why none of them are featured here. 

I then set them all to the same length before wearing them individually to note comfort and how securely they stay in place. Thankfully all heart rate monitors I've tested have been comfortable enough that they are easily forgotten once in place, but I do find the Polar H10 is most comfortable and secure.