Heart rate monitors and chest straps for training

Garmin, Polar, and COROS heart rate monitors compared

Six heart rate monitors: compare chest straps, armbands, and fit.

Model and link	Placement and use	Recording and battery life	Best fit for
Polar H9 Black Affiliate link View on Amazon.com	Chest strap with an electrical sensor. Sends heart rate to a compatible watch, app, or machine.	Bluetooth, ANT+, and 5 kHz. No onboard workout storage. Replaceable battery rated for up to 400 hours by Polar.	Sending heart rate to a compatible device during a workout.
Polar H10 Black, M–XXL Affiliate link View on Amazon.com	Chest strap with an electrical sensor. Useful if you switch between an app and a watch or want to record a workout.	Two simultaneous Bluetooth connections, ANT+, and 5 kHz. Stores one workout. Replaceable battery rated for up to 400 hours by Polar.	Training with two Bluetooth connections or storing a workout on the sensor.
Polar Verity Sense Gray Affiliate link View on Amazon.com	Optical sensor with an armband. A swimming-goggle clip can hold it against your temple.	Bluetooth and ANT+. The manual lists up to 600 hours of memory and up to 30 hours of training per charge.	Wearing the sensor on your arm or using the swim clip.
Garmin HRM 200 Black Affiliate link Amazon.com · XS–S · 60–85 cm Amazon.com · M–XL · 80–119 cm	Electrical chest strap. Sends heart rate and heart rate variability to a compatible receiver.	ANT+ and Bluetooth. Replaceable CR2032 battery.	Sending heart rate to a compatible watch, bike computer, or app.
Garmin HRM 600 Affiliate links View on Amazon.com · XS–S View on Amazon.com · M–XL	Chest strap	Records activities with Garmin Connect. Up to 2 months at 1 hour per day.	Running, cycling, and compatible Garmin metrics
COROS Heart Rate Monitor Affiliate link View on Amazon.com · gray, standard size	Optical armband, standard 18–32 cm	Up to 38 hours. Bluetooth.	Running or indoor training with a Bluetooth receiver

Listings reviewed November 11, 2026. Check delivery for your ZIP code. The comparison uses the product pages and manuals.

Side-by-side heart rate monitor comparisons

If you’re deciding between two sensors, compare how they fit, which connections they support, and whether you need to carry your phone during the workout.

• Polar H9 vs. H10
• Polar H10 vs. Verity Sense

Garmin HRM 200 vs. HRM 600

Both chest straps send live heart rate and heart rate variability to compatible devices. Battery type and workout recording are the main differences.

• Garmin HRM 200. Choose it for live heart rate on a compatible watch, bike computer, or app. It uses a replaceable CR2032 battery. See Garmin HRM 200 sizes.
• Garmin HRM 600. Choose it to record a workout without a watch through Garmin Connect. It is rechargeable, and advanced running metrics require a compatible watch. See Garmin HRM 600 sizes.

For both models, XS–S fits a 23.5–33.5 in (60–85 cm) chest and M–XL fits a 31.5–47 in (80–119 cm) chest. Each size has its own Amazon button in the cards.

Official Garmin comparison · Garmin chest size chart

Heart rate monitors for running and cycling

For running, start with the equipment you already use. Check watch compatibility if you want running dynamics. For cycling, check ANT+ or Bluetooth support on the bike computer or indoor training app. Compare Garmin HRM 600 with Polar H10 for a chest strap, or COROS Heart Rate Monitor with Polar Verity Sense for an armband.

What to check before buying

Garmin HRM 200 vs. Polar H9

Both straps send heart rate to compatible watches, apps, or machines. The Garmin HRM 200 also sends heart rate variability data to compatible receivers. Polar H9 adds 5 kHz transmission for gym equipment that uses it. Check the connection type and your chest size before choosing.

Check your watch, bike computer, or app

Look for Bluetooth LE or ANT+ support for external sensors in the specifications. If two Bluetooth receivers need data at the same time, check the H10 or Verity Sense connection settings.

Decide if you will carry your phone

The H9 sends live data and needs a receiver to record the workout. For the H10, check how to start onboard recording in the compatible app. Verity Sense can record on its own and sync afterward.

Confirm the size and what is in the box

Compare your chest measurement with the manufacturer’s chart, then check the selection on Amazon.com. For Verity Sense, check whether the box includes the armband, charger adapter, and swimming clip.

Sources and other guides

• Polar US sensor comparison
• Polar H9 features and accessories
• Polar Verity Sense manual specifications
• Garmin HRM 200 XS–S · 60–85 cm
• Garmin HRM 200 M–XL · 80–119 cm

See all US buying guides.