10 Best Heart Rate Monitor of 2026, Chest Straps and Armbands for Training Zones

Most people shopping for a chest strap want numbers they can trust when an interval session gets ugly. That's why the Polar H10 sits at the top, and UK roundups backed it more consistently than anything else in my research. It reads the heart's electrical signal at the chest rather than shining light through skin, and it broadcasts over Bluetooth, ANT+ and 5 kHz with two simultaneous Bluetooth connections, so a watch and a gym bike console can share it. A coin cell runs it for around 400 hours. It isn't faultless, though: this listing is the M-XXL strap, so slimmer chests need the XS-S version, and the onboard memory holds only a single session.

If you already wear a Garmin watch, this is the strap that gets the most out of it. The HRM-600 replaces the HRM-Pro that independent reviewers covered for years, so I'm judging the new model on Garmin's own listing rather than on borrowed verdicts. It adds a rechargeable battery listed at up to two months, a machine-washable strap and onboard recording for five-a-side training where watches aren't allowed, syncing to Garmin Connect, plus running dynamics such as stride length and ground contact time balance. The trade-off is lock-in. Most of that extra detail needs a compatible Garmin watch, and it sits a full price tier above the Polar H10.

Indoor cyclists training in a cramped spare room are the obvious audience for the Trackr, Wahoo's successor to the TICKR that UK reviewers covered. It swaps the coin cell for a rechargeable battery listed at more than 100 hours, a good few months of turbo sessions. ANT+ and Bluetooth work together, so a bike computer and the Zwift app can both read it, and the LED confirms whether it has found your pulse, is still connected or is running low. What's missing is memory. Unlike the Polar H10 and the Garmin, the listing mentions no onboard storage, so a device has to stay connected, but most turbo set-ups have one anyway.

Read this listing carefully before you buy, because CooSpo sells several similar straps and older H6 specifications with a coin cell still circulate online. This link is the H9Z, with a built-in rechargeable battery rated for up to 50 hours per charge, Bluetooth 5.0 and ANT+ compatibility with Strava, Zwift, Peloton and Polar Beat, and a five-colour LED that changes with your heart rate zone, which is oddly useful in a gym mirror. That's a sensible specification for a cheap heart rate monitor. But buyer feedback looks noticeably more mixed than for the Wahoo Trackr or the Polar, so keep the returns window in mind.

Some people simply can't get on with a chest strap, and the Rhythm+ 2.0 is the one I'd point them towards. It sits on the forearm, biceps or triceps and combines an optical sensor with an accelerometer, so nothing presses on your sternum during a long Sunday run. The rechargeable battery is listed at up to 24 hours, the IP68 rating means the listing is happy for you to swim with it, and ANT+ plus Bluetooth Smart covers most gym equipment and training apps. The limitation is physics rather than Scosche. Optical arm sensors, however, generally trail sudden changes in effort, so a hill sprint may register slightly later than it would on a chest strap.

Compared with the Scosche, the moofit HW401 asks for less money but gives up a little in return. It's an optical armband with Bluetooth and ANT+, IP67 protection against sweat and rain, and a rechargeable battery with a magnetic cable, listed at 20 hours or more per charge. The pod is listed at 7.7 grams, light enough to forget on your forearm during a circuits class, and a blue LED flashes quickly until it finds your pulse. I couldn't find any editorial coverage of this model, so it's here on its listing alone. Treat it as a sensible punt, not a proven performer.

Eight hundred hours is the listed life of the replaceable CR2032 coin cell in the Geoid HS500, which the listing calculates as roughly two and a half years for someone training an hour a day, four days a week. Otherwise it's a plain chest strap with Bluetooth 4.2 and ANT+, an IP67 rating and a listed wake-up time under a second. Geoid is a little-known brand without editorial coverage, so this is a listing-based pick, and its Bluetooth 4.2 radio is older than those on the CooSpo and iGPSPORT. As a spare strap for the gym bag it makes sense, but I wouldn't make it my only one.

Drifting out of zone two on a long ride is the problem this armband tries to fix. The HR70 shows your zone through coloured LEDs and vibrates when you stray outside custom zones, which is handier on a Sunday club run than squinting at a bike computer in the rain. The battery is listed at 65 hours with Type-C magnetic charging, and pairing covers Bluetooth 5.0 and ANT+. The downside is evidence. iGPSPORT is better known for bike computers, this listing is new with very little buyer history, and there's no water rating, so skip it for swimming. Next to the Scosche, it trades the swim rating for vibration alerts and longer listed battery life.

There's no model number on the Fitcent listing, which bothered me more than it probably should. The specification is reasonable: an optical armband with a CL830 sensor, Bluetooth and ANT+, a rechargeable lithium battery listed at 60 hours and an LED that turns solid green once charging finishes. Zwift, Peloton, Polar Beat and Komoot are among more than 200 compatible apps. But it's a listing-based pick without editorial backing, and with no water rating given, it belongs on indoor rides rather than wet runs.

Look, the Cardiosport Optic is a simple armband, and that's mostly fine. It wears on the forearm or bicep, uses an optical PPG sensor, displays LED colour zones and pairs over Bluetooth and ANT+ with Garmin, Polar, Apple and Samsung watches, plus apps like Zwift, Rouvy and Peloton, and the box includes a USB charger. My reservation is the battery. The listing quotes two different figures, so I'd plan on charging it every few sessions. Buyer history is limited too, and the Fitcent offers a longer listed battery for similar money.