Interval training demands responsive heart-rate data so you can judge effort during hard repeats, recoveries, and changing intensity. The right monitor should pair reliably with your watch, bike computer, phone, or training app without distracting you mid-workout.
We’ve gathered 10 strong options, from highly accurate chest straps to more comfortable optical armbands, to help you find a heart rate monitor for interval training that fits your workouts, devices, and budget.
Best 10 Heart Rate Monitor for Interval Training Picks for 2026
Most Accurate Chest Strap
- Highly accurate chest-strap heart-rate tracking
- Bluetooth and ANT+ connectivity
- Waterproof with 400-hour battery life
Best For: Athletes prioritizing accuracy and broad compatibility
Best for Garmin Data
- Real-time heart rate and HRV data
- Records workouts without a watch
- Adds running dynamics and rechargeable power
Best For: Garmin users seeking detailed performance metrics
Best Armband Alternative
- Comfortable forearm, bicep, or tricep placement
- Bluetooth and ANT+ connectivity
- IP68 waterproof design with HRV mode
Best For: Users who prefer an armband to a chest strap
Best Affordable Chest Strap
- Accurate everyday chest-strap tracking
- Works with equipment and smartphone apps
- Up to 400 hours of battery life
Best For: Everyday interval training on a budget
Best Dual-Protocol Pick
- Bluetooth and ANT+ connectivity
- Real-time heart rate and calorie tracking
- Small and large bands included
Best For: Multi-device interval training
Best Auto-Wear Armband
- Automatic wear detection
- Pairs with up to three Bluetooth devices
- 38-hour operating battery life
Best For: COROS-centered Bluetooth training
Best Long-Battery Chest Strap
Wahoo TRACKR Heart Rate Monitor
- Up to 200 hours of active battery life
- Bluetooth and ANT+ connectivity
- Soft, secure chest strap
Best For: High-frequency interval training
Best Dual-Protocol Chest Strap
- Stated ±1 BPM heart-rate data
- Bluetooth and ANT+ connectivity
- Up to 300 hours of battery life
Best For: Multi-device interval training, cycling, and gym workouts
Best Heavy-Duty Pick
- Up to 800 hours of battery life
- ANT+ and Bluetooth support
- LED confirms connection and heart rate
Best For: Frequent interval workouts across apps and fitness equipment
Best Armband With Zone Feedback
- Stated ±1 BPM optical accuracy
- Color LED heart-rate-zone indicators
- Bluetooth 5.0 and ANT+ support
Best For: Interval training with quick, visible zone feedback
Most Accurate Chest Strap – Polar H10
If accuracy and broad device compatibility are priorities, the Polar H10 is a strong heart rate monitor for interval training. Its chest-strap design, simultaneous Bluetooth and ANT+ connections, waterproof construction, and internal memory suit structured workouts where reliable intensity data matters.
Best For: Athletes who want highly accurate chest-strap readings and flexible connectivity for interval sessions.
Pros:
- Recognized for top-level heart-rate measurement accuracy.
- Supports Bluetooth, ANT+, and 5 kHz connections, including simultaneous Bluetooth connections.
- Waterproof and equipped with internal memory for multiple hours.
- Offers up to 400 hours of battery life.
Cons:
- Chest straps may feel less convenient than armband monitors for some users.
- Uses a replaceable CR2025 button-cell battery rather than a rechargeable battery.
The H10 is a particularly practical choice when interval training demands dependable readings across watches, phones, gym equipment, or compatible apps.
Best for Garmin Data – Garmin HRM 600
The Garmin HRM 600 is a data-focused heart rate monitor for interval training, especially for athletes already using compatible Garmin devices. It provides real-time heart rate and HRV data, records workouts when a watch is unavailable, and adds running metrics such as stride length and ground contact time balance.
Best For: Garmin users who want detailed workout recording, running dynamics, and rechargeable convenience.
Pros:
- Sends real-time heart rate and HRV data to compatible Garmin devices, equipment, and apps.
- Records workouts without a watch and syncs data to Garmin Connect.
- Provides additional running dynamics and indoor pace and distance features with compatible devices.
- Machine-washable strap and rechargeable battery with up to two months of life.
Cons:
- Several advanced features require a compatible Garmin smartwatch.
- Its strongest feature set is centered on the Garmin ecosystem.
For runners who analyze intervals beyond heart rate alone, the HRM 600 offers a deeper performance-data package than a basic sensor.
Best Armband Alternative – Scosche Rhythm+ 2.0
The Scosche Rhythm+ 2.0 is a comfortable heart rate monitor for interval training if you prefer an armband over a chest strap. Its optical sensor can be worn on the forearm, bicep, or tricep, while Bluetooth and ANT+ support make it suitable for watches, fitness equipment, and training apps.
Best For: Runners, cyclists, and gym users who want a secure, breathable alternative to a chest strap.
Pros:
- Adjustable armband can be worn on the forearm, bicep, or tricep.
- Supports both Bluetooth and ANT+ connections.
- HRV mode captures RR interval data for supported training and wellness apps.
- IP68 waterproof construction and up to 24 hours of continuous battery life.
Cons:
- Its 24-hour battery life is shorter than the battery life listed for the Polar chest straps.
- Optical armband placement may not suit users who specifically prefer chest-strap sensors.
The Rhythm+ 2.0 is a versatile pick for high-intensity workouts when comfort and flexible placement matter as much as connectivity.
Best Affordable Chest Strap – Polar H9
Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap, M-XXL
Check Price On AmazonThe Polar H9 is a straightforward heart rate monitor for interval training when you want reliable chest-strap tracking without the H10’s broader feature set. It works with compatible equipment and smartphone apps, making it a practical option for everyday intervals and general workout monitoring.
Best For: Everyday exercisers seeking an affordable, accurate chest-strap sensor with phone and equipment compatibility.
Pros:
- Uses Polar’s high-accuracy heart rate sensors.
- Works with HRM-compatible equipment and popular smartphone apps.
- Offers up to 400 hours of battery life.
- Includes a soft strap and a two-year manufacturer warranty.
Cons:
- Provides fewer stated connectivity options than the Polar H10.
- Uses a replaceable CR2025 button-cell battery.
The H9 keeps the essentials simple: dependable chest-strap readings, broad everyday compatibility, and long battery life for regular interval workouts.
Best Dual-Protocol Pick – Wahoo TICKR FIT
The Wahoo TICKR FIT is a practical heart rate monitor for interval training when you want an armband that works with both smartphones and GPS devices. Its optical sensor tracks heart rate, calories, and workout duration, while Bluetooth and ANT+ support broadens app and equipment compatibility.
Best For: Athletes who want a comfortable armband with Bluetooth and ANT+ connectivity.
Pros:
- Supports both Bluetooth Smart and ANT+ connections.
- Tracks heart rate, calorie burn, and workout duration in real time.
- Includes small and large adjustable bands for a secure fit.
- Offers up to 35 hours of battery life.
Cons:
- Uses optical sensing rather than a chest-strap sensor.
- The included warranty is one year.
The TICKR FIT stands out for compatibility and flexible sizing. It is a strong choice if your interval-training setup includes multiple apps or ANT+ equipment.
Best Auto-Wear Armband – COROS Heart Rate Monitor
The COROS Heart Rate Monitor is a comfortable heart rate monitor for interval training, with automatic wear detection and Bluetooth pairing for up to three devices at once. Its breathable armband is designed for sports use and provides up to 38 hours of operation per charge.
Best For: COROS users and athletes who want quick, multi-device Bluetooth pairing.
Pros:
- Automatically powers on and off when worn.
- Can connect simultaneously with up to three Bluetooth devices.
- Soft, breathable band is designed for sports comfort.
- Provides 38 hours of operation and up to 80 days of standby.
Cons:
- Bluetooth only; it is not compatible with ANT+.
- Designed for sports and activity use rather than daily tracking.
- The Type-C adapter is not included.
With auto-wear detection and a flexible fit, this COROS armband minimizes setup between interval sessions. Choose it when Bluetooth compatibility meets your training needs.
Best Long-Battery Chest Strap – Wahoo TRACKR Heart Rate Monitor
The Wahoo TRACKR is a heart rate monitor for interval training built around a chest-strap sensor, real-time data, and exceptionally long rechargeable battery life. Bluetooth and ANT+ connectivity make it suitable for smartphones, fitness equipment, training apps, and other accessories.
Best For: Frequent interval trainers who prioritize chest-strap placement and long battery life.
Pros:
- Provides real-time heart rate data for training.
- Supports both ANT+ and Bluetooth connectivity.
- Offers up to 200 hours of active battery life.
- Soft, secure strap is designed for intense exercise.
Cons:
- Chest-strap placement may be less appealing than an armband.
- The supplied warranty is one year.
The TRACKR is a compelling option for athletes who train often and do not want to recharge after every few sessions. Its dual connectivity also makes it adaptable to a wide range of training setups.
Best Dual-Protocol Chest Strap – COOSPO H6
If you want a dependable heart rate monitor for interval training, the COOSPO H6 combines stated ±1 BPM accuracy with both Bluetooth and ANT+ connectivity. Its chest-strap design is suited to workouts involving compatible phones, watches, bike computers, gym equipment, and fitness apps.
Best For: Athletes who want a chest-strap monitor with broad Bluetooth and ANT+ compatibility for intervals, cycling, and gym workouts.
Pros:
- Provides stated ±1 BPM real-time heart-rate data.
- Supports both Bluetooth and ANT+ for connecting to multiple compatible devices.
- Works with many apps, sports watches, bike computers, and equipment including Peloton.
- Offers up to 300 hours of battery life and IP67 protection for sweat and rainy-day training.
Cons:
- Requires moistening the electrode areas, especially in dry conditions.
- Not intended for swimming or soaking.
- The sensor should be separated from the strap after each workout.
The H6 is a practical pick when interval sessions span several platforms. Its replaceable-battery design and dual wireless protocols add convenience, while the chest strap may appeal to users prioritizing exercise heart-rate data over armband comfort.
Best Heavy-Duty Pick – GEOID HS500
The GEOID HS500 is a strong option if you need a heart rate monitor for interval training that can stay ready between workouts. It uses ANT+ and Bluetooth, includes a connection-confirmation LED, and is designed to reduce movement- and sweat-related signal interference.
Best For: Frequent runners, cyclists, and fitness users who value long battery life and wide app or equipment compatibility.
Pros:
- Offers up to 800 hours of battery life with a replaceable CR2032 battery.
- Uses redesigned hardware and algorithms intended to limit movement and sweat interference.
- Supports ANT+ and Bluetooth connections with compatible phones, watches, bike computers, treadmills, and apps.
- Provides an LED signal for heart-rate and connection confirmation.
Cons:
- Swimming is not recommended.
- Requires connecting through the fitness app rather than directly through the phone’s Bluetooth settings.
- The LED turns off after its initial confirmation flashes, so it is not a continuous display.
With its unusually long stated battery life and one-year limited warranty, the HS500 suits users who do not want frequent battery changes. The chest-strap format and broad protocol support make it especially useful for structured intervals across different training setups.
Best Armband With Zone Feedback – COOSPO HW807
For athletes who prefer an armband, the COOSPO HW807 is a flexible heart rate monitor for interval training with stated ±1 BPM accuracy and color-coded heart-rate-zone feedback. It also supports HRV tracking and connects to compatible Bluetooth 5.0 or ANT+ devices.
Best For: Users who want visible heart-rate-zone feedback from an armband during interval workouts, gym sessions, cycling, or app-based training.
Pros:
- Uses optical sensing with stated ±1 BPM accuracy during exercise.
- Color LED indicators make heart-rate zones easier to recognize during training.
- Supports HRV and Bluetooth 5.0 or ANT+ connections with many compatible apps and devices.
- IP67 protection supports rainy-day training, and the rechargeable battery provides up to 20 hours.
Cons:
- Its stated 20-hour battery life is much shorter than the chest-strap options.
- Not recommended for swimming.
- Optical armband placement may not suit users who prefer a chest strap.
The HW807 stands out for immediate zone feedback without checking a phone or watch. It is a convenient choice for interval training when armband comfort and visual intensity cues matter more than extended battery runtime.
How We Picked the Best Heart Rate Monitor for Interval Training
We focused on monitors suited to repeated changes in intensity, where dependable readings and stable connectivity matter most. The selection includes chest straps and armbands with Bluetooth and/or ANT+ support, along with models designed for running, cycling, gym training, indoor rides, and multisport use.
We also considered sensor placement, comfort, water resistance, battery design, compatibility, and useful training features such as heart-rate zones, internal memory, automatic wear detection, or visible status indicators. A monitor does not need every feature to be a good choice, but it should match the equipment and workout style you use most.
Quick Comparison
- Chest straps: Usually the best choice for fast, consistent readings during intense intervals and rapid heart-rate changes.
- Optical armbands: Easier to put on and often more comfortable than a chest strap, while remaining practical for most fitness sessions.
- ANT+ and Bluetooth: Dual-protocol models offer the widest compatibility with watches, cycling computers, phones, gym equipment, and training apps.
- Water resistance: Useful for sweaty workouts, outdoor training, and sessions in changing weather; check the stated rating before swimming.
- Battery type: Rechargeable models reduce disposable-battery hassle, while replaceable-cell monitors can be convenient for long-term ownership.
Key Buying Factors for a Heart Rate Monitor for Interval Training
Accuracy and Response Time
For sprint intervals, threshold work, and short recovery periods, a chest strap is generally the safest pick for responsive data. Armbands can be highly convenient, but optical readings may be affected by movement, fit, cold skin, or poor sensor contact.
Compatibility and Connectivity
Confirm that the monitor supports the devices you already own. Bluetooth is useful for phones and many modern fitness apps, while ANT+ remains valuable for cycling computers, watches, and gym equipment. Dual-band support provides the most flexibility.
Comfort and Fit
A chest strap must sit firmly against the skin without restricting breathing. An armband should stay secure during arm movement without feeling tight. Comfort matters because inconsistent wear can undermine otherwise good sensor performance.
Battery Life and Durability
Look for battery performance that suits your training schedule and a water-resistant design that can handle sweat and rain. Rechargeable units are convenient, while replaceable batteries can be preferable if you train far from a charger.
Who Should Buy Which Heart Rate Monitor for Interval Training?
Choose a chest strap if precise, quick-changing readings are your priority, especially for serious runners, cyclists, rowers, and athletes following structured interval plans. The Polar H10, Garmin HRM 600, Polar H9, Wahoo TRACKR, COOSPO H6, and GEOID HS500 are particularly relevant formats to compare.
Choose an optical armband if you dislike chest straps or want faster setup for gym sessions, running, and general conditioning. The Scosche Rhythm, Wahoo TICKR FIT, COROS Heart Rate Monitor, and COOSPO HW807 offer a more convenient alternative.
Prioritize dual connectivity if you switch between a smartwatch, phone, bike computer, and fitness equipment. If you train mainly with one ecosystem, verify app and device compatibility before choosing the monitor with the most features.