Heart Rate Monitors: The Complete Buying Guide
Choose a heart rate monitor that fits your workout and connects to the device you use. Chest straps suit direct chest measurement, armbands keep the sensor off your chest, and watches offer an all-in-one option.
On this page (12 sections)
- What type of heart rate monitor should you choose?
- How does a chest strap monitor heart rate?
- How does an optical armband work?
- Is a heart rate monitor watch enough?
- What connection should your heart rate monitor use?
- How should a heart rate monitor fit?
- Which heart rate monitor features matter for exercise?
- Which monitor suits common workouts?
- How to choose among these heart rate monitors
- How do you keep a heart rate monitor working?
- Explore fitness trackers by topic
- Which heart rate monitor should you pick?
A heart rate monitor helps you see how hard your body is working during exercise. Compare heart rate and blood pressure monitors based on which measurement you need.
Choose a chest strap for a dedicated sensor, an armband if you prefer not to wear a strap across your chest, or a watch if you want heart rate data alongside other tracking features.
Before you buy, check fit, sensor type, connection options, and the device or app you plan to use. A monitor that cannot pair with your phone, watch, bike computer, or treadmill may not fit your routine.
What type of heart rate monitor should you choose?
Choose the monitor type that you can wear comfortably and connect to your workout setup. Chest straps, optical armbands, and watches each place the sensor differently.
| Type | Sensor placement | Often suits | Check before buying |
|---|---|---|---|
| Chest strap | Across the chest | Cycling, treadmill sessions, or workouts with a compatible device | Strap fit and pairing options |
| Optical armband | Forearm, bicep, or tricep | People who prefer an arm-worn sensor | Placement, strap adjustment, and battery needs |
| Watch | Wrist | People who want heart rate with watch functions | Sensor fit and whether it pairs with other equipment |
| Gym equipment grips | Hands on built-in sensors | Quick readings while holding the handles | Whether the equipment provides continuous data |
A chest strap measures from the chest and may be a practical fit when your workout device supports an external sensor. An optical armband keeps the monitor on your arm, while a watch combines heart rate tracking with a device you may already wear.
Hand grips built into some exercise machines can show a reading when you hold them. If you are choosing the machine itself, see our exercise bike buying guide.
They may be less useful if you want to keep your hands free or track continuously away from the machine.
If your main workouts are on a treadmill, compare the options in our best heart rate monitor for treadmill workouts guide. For a closer look at wear styles, read heart rate monitor chest strap vs watch.
How does a chest strap monitor heart rate?
A chest strap holds a sensor against the chest to read signals from the heartbeat. The strap needs a snug fit and good contact to send data to a paired watch, phone, bike computer, or compatible gym machine.
Some chest straps use electrode areas that need moisture before use. For example, COOSPO advises wetting the H6's electrode areas before wearing it, and says dry winter conditions may require more water for stable transmission.
Connection details matter as much as the sensor. COOSPO advises pairing the H6 from the app rather than from the phone's Bluetooth device list.
A chest strap may take a little more setup than a wrist-worn device: adjust the length, position the sensor, and check that your equipment recognizes it. If you want to compare Polar options, see our best Polar heart rate monitor guide and Polar H10 heart rate monitor review.
How does an optical armband work?
An optical armband reads heart rate from the skin and holds the sensor on your arm. It can suit you if a chest strap feels restrictive or gets in the way during movement.
The Rhythm armband is described as compatible with fitness apps, sports watches, and equipment that supports Bluetooth or ANT+. Scosche gives it up to 24 hours of continuous battery life, so plan charging around your use.
Fit affects any optical sensor. Wear the armband securely in the placement recommended for the device, and check that it stays put during your workout.
Some armbands also offer heart rate variability data. The Scosche Rhythm's HRV mode captures RR interval data for compatible apps, according to its product details.
If arm placement fits your needs, compare more options in our best armband heart rate monitor guide.
Is a heart rate monitor watch enough?
A heart rate monitor watch can be enough if you want a wrist-worn device that tracks workouts and other activity. Check whether its heart rate data can also pair with your treadmill or training app if you want the reading on another screen.
A watch may be convenient when you already use one for running or daily activity. It may not be the right choice if you need a separate sensor that connects to gym equipment or a bike computer.
A fitness tracker and a smartwatch can have different features and app support. Our fitness tracker vs smartwatch guide explains the trade-offs, and our best heart rate monitor watch roundup compares wrist-worn choices.
For running, also consider whether you need built-in GPS or prefer to use your phone. See our best running watch with GPS guide for options focused on route tracking.
What connection should your heart rate monitor use?
Choose Bluetooth or ANT+ based on the devices you want to connect. Confirm compatibility before buying, especially if you want one sensor to work with a phone app and exercise equipment.
Bluetooth is common for pairing with phones and many apps. ANT+ is used by some sports watches, bike computers, and gym equipment.
Some monitors support both, giving you more flexibility across devices.
The Polar H10 supports Bluetooth, ANT+, and 5 kHz connections, and Polar says it can use Bluetooth and ANT+ at the same time, as well as two Bluetooth connections simultaneously. Its sensor also has internal memory for multiple hours.
Before choosing, make a short list of what you need to connect: phone, watch, treadmill, bike computer, or app. Then check that each device supports the same connection standard and can pair with an external heart rate sensor.
For more options that connect through Bluetooth, see our best Bluetooth heart rate monitor guide. If you use a Garmin device, our Garmin Forerunner 165 Music review and best Garmin fitness tracker guide cover related choices.
How should a heart rate monitor fit?
A heart rate monitor should stay in place during movement without rubbing or pinching. Fit it according to the device instructions, then check comfort through the full range of your workout.
For a chest strap, adjust the band so the sensor sits against your chest and does not slide. Some models require wetting the electrode areas before exercise.
Detach a removable sensor after your workout if the manufacturer recommends it.
For an armband, adjust the strap so the sensor maintains contact with your skin. Move it to the recommended position if the reading drops or the band shifts during a session.
For a watch, make sure the watch sits securely on your wrist while remaining comfortable. If you are choosing a tracker for a specific body placement, our guide to a fitness tracker for your ankle explains what to consider.
Replacement straps can matter if the sensor works but the band no longer fits your routine. See our best heart rate monitor band guide for replacement options.
Which heart rate monitor features matter for exercise?
Prioritize the features that match your activity and the device you use. Start with fit and connectivity, then consider battery, water resistance, memory, or app support if those features affect your routine.
- Sensor type: Pick chest contact or optical reading based on comfort and workout needs.
- Connection: Match Bluetooth or ANT+ to your phone, watch, computer, or machine.
- Battery: Check whether the monitor uses a replaceable coin cell or a rechargeable battery.
- Water resistance: Confirm whether the device is suitable for sweat, rain, or swimming. Do not assume every water-resistant monitor is for swimming.
- App support: Check that your preferred training app can pair with the sensor.
- Fit range: Confirm the strap or band adjusts to your body and stays secure while moving.
- Memory: Consider onboard storage if you train without carrying a connected phone or watch.
Product details can help narrow choices. The COOSPO H6 uses a replaceable CR2032 battery and is rated IP67, with the brand advising not to use it for swimming or soak it in water.
The Polar H10 uses a CR2025 button cell, and Polar cautions that another battery size may cause damage or malfunction.
If you want to track heart rate without a wearable during a quick check, see how to monitor heart rate at home. For a child, fit and intended use deserve extra care; our best heart rate monitor for kids guide focuses on that audience.
Which monitor suits common workouts?
Match your monitor to the movement, equipment, and display you use. A compatible connection and stable fit matter more than having extra features you will not use.
Running and treadmill sessions
A chest strap or armband can send heart rate to a compatible watch, app, or treadmill. Sole owners can compare heart rate monitors for Sole treadmills after checking their model's supported connection.
Check the treadmill's supported connection before relying on it to display data.
For choosing effort, heart rate zones can be one training reference, but they are not a medical measure of safety. See what is a good treadmill heart rate zone for cardio? for a general guide to zones.
If you use a Garmin watch with a treadmill, calibration can affect distance estimates separately from heart rate tracking. See how to calibrate the Garmin 165 for model-specific steps.
Read why Garmin treadmill calibration is not working if your indoor distance seems off.
Cycling
A chest strap or armband can pair with a compatible bike computer, sports watch, or cycling app. Verify the connection standard on the sensor and receiving device before your ride.
For Polar-specific choices, compare our Polar H10 heart rate monitor review with the COROS heart rate monitor review. If you ride with a watch, make sure the monitor and watch can pair as external sensors.
Strength training
Choose a monitor that stays secure through lifting, reaching, and changes in arm position. Some people may prefer an armband over a chest strap for upper-body movement, while others may use a watch they already wear.
A heart rate monitor shows workout intensity, but it does not measure how much weight you lift or whether your form is sound. For more on home strength equipment buying guide, see our guide.
For setup help with adjustable weights, see how to use Bowflex adjustable dumbbells.
How to choose among these heart rate monitors
Choose by sensor style and device support first, then compare specific features. These four options cover chest straps, a replacement strap, and an armband.
COOSPO H6: Bluetooth and ANT+ chest sensor
The COOSPO H6 suits someone who wants a chest strap that can connect through Bluetooth or ANT+. COOSPO lists compatibility with several fitness apps, sports watches, bike computers, and gym equipment.
Its strap needs moistened electrode areas before use, and the sensor should be separated from the strap after exercise, according to COOSPO's guidance. The brand says its replaceable CR2032 battery supports up to 300 hours of use.
Choose it if: You want both Bluetooth and ANT+ options for compatible devices.
Check first: Your app or gym equipment supports its connection method.
Scosche Rhythm: arm-worn optical sensor
The Scosche Rhythm suits people who want an optical sensor worn on the forearm, bicep, or tricep. Its Bluetooth and ANT+ connections can work with compatible apps, watches, and equipment.
Scosche also describes an HRV mode that sends RR interval data to compatible apps. The armband is rated IP68, but check the manufacturer's instructions for your intended water exposure.
Choose it if: You prefer an arm-worn sensor and want dual-band connectivity.
Check first: Its battery and charging routine suit how often you train.
Polar H10: connected chest strap with memory
The Polar H10 suits someone who wants multiple connection options and sensor memory. It supports Bluetooth, ANT+, and 5 kHz, and Polar describes it as compatible with HRM-ready equipment.
It uses a CR2025 button cell. Polar cautions that another battery size may damage the sensor or cause it to malfunction, so follow its battery guidance.
Choose it if: You want a chest strap with several connection methods.
Check first: Your intended equipment supports the connection you plan to use.
Polar Pro Chest Strap: replacement strap for Polar sensors
The Polar Pro Chest Strap is a strap for compatible Polar heart rate sensors, not a complete monitor by itself. It uses a snap attachment method and is described as compatible with Polar sensors.
It has adaptive electrodes and extra interference-preventing electrodes, according to Polar's product details. Confirm that your existing sensor uses the same attachment method before choosing it.
Choose it if: You already have a compatible Polar sensor and need a strap.
Check first: The sensor and strap share the same snap connection.
How do you keep a heart rate monitor working?
Follow the care and pairing directions for the specific monitor. Good contact, a secure fit, and correct pairing can help avoid common setup issues.
- Wet chest-strap electrode areas if the manufacturer recommends it.
- Pair from the intended app or device menu, not an unrelated Bluetooth screen, when instructions say to do so.
- Rinse or clean the wearable parts as directed after sweaty workouts.
- Detach a removable sensor from its strap after exercise if the manufacturer advises it.
- Check battery type before replacing a coin cell.
- Keep straps and bands dry between sessions when the care instructions call for it.
A monitor that stops sending data may need a fresh battery, a better fit, or a new pairing. Check each step before replacing the sensor.
Explore fitness trackers by topic
- Best Heart Rate Monitors for Men
- Best Chest Strap Heart Rate Monitors
- Fitbit Charge vs Versa: Which Fits Your Workouts?
- Best Fitbit Replacement Chargers
- Best Fitness Tracker Rings
Which heart rate monitor should you pick?
Pick a chest strap if you want a dedicated sensor that can pair with compatible training devices. Choose an armband if you prefer arm placement, and choose a watch if you want heart rate tracking in a wrist-worn device.
For a chest strap with Bluetooth and ANT+, consider the COOSPO H6 or Polar H10 based on the connection features you need. If you already own a compatible Polar sensor, the Polar Pro Chest Strap may be the right replacement; if you prefer an optical armband, compare the Scosche Rhythm.
Check device compatibility and fit before you buy. For more exercise-focused choices, see our best heart rate monitor for exercise guide.
Frequently asked questions
What type of heart rate monitor is most accurate?
Chest straps measure electrical signals from your heartbeat and are a common choice when you want a dedicated sensor for exercise. Optical armbands and watches read signals at the skin, and their results can vary with fit, movement, and placement.
Compare the sensor type and fit that suit your workout.
Can I connect a heart rate monitor to a treadmill?
Some heart rate monitors connect to compatible gym equipment, but support varies by sensor and treadmill. Check whether your equipment accepts Bluetooth or ANT+ and whether it can pair with an external heart rate sensor.
A phone app or sports watch may be another option if the treadmill cannot connect directly.
Where should I wear an optical heart rate monitor?
Follow the device's placement instructions and keep the sensor secure against your skin. An armband may sit on your forearm, bicep, or tricep, depending on the design.
A watch usually sits on the wrist.
Adjust the fit so the sensor stays in place during your activity without pinching.
Do I need Bluetooth and ANT+?
Choose Bluetooth if you mainly pair with a phone, tablet, or compatible watch; ANT+ can help when your bike computer or gym equipment uses that standard. Some sensors offer both, which gives you more pairing options.
Check the devices you actually plan to use before choosing a monitor.
Can a heart rate monitor tell me whether exercise is safe?
A heart rate monitor reports a measurement; it does not diagnose a condition or decide whether a workout is safe for you. Use the monitor as one training input and follow guidance from a qualified health professional if you have symptoms, a heart condition, or questions about exercise.
