Syncs with Apple Health, Garmin & more via BLE Syncs with Apple Health, Garmin & more via bluetooth 5.0
Lightweight. Sweat & water-resistant. (IP67)
Superior battery life for 14 days on typical usage
£199
Inclusive of VAT.
OR
£28
/month*
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Use code MARATHON to get 25% Off
What our customers say
GJ
Gareth Jenkins
1 reviews
•
NL
Mar 18, 2026
I used the online fourth frontier analysis tool together with my own ramp tests and FTP tests to nail my “easy”, “moderate” and “hard” intensity zones with power, heart rate and breathing. Very powerful- to the extent that pro-cycling teams are doing this now
DI
dip
4 reviews
•
US
Mar 18, 2026
This is an excellent product and provides insightful data on cardiovascular health during exercise. It integrates well with the iPhone and Garmin products. I have been using this for over a year for cycling and running.
DH
Dharmesh
10 reviews
•
GB
Mar 18, 2026
Love the HR monitor, using it for running cycling walking mainly for over a year. Used it to work out my FTP and even impressed my GP. Taking back control of my health from the state and industry.
GJ
Gareth Jenkins
1 reviews
•
NL
Mar 18, 2026
I used the online fourth frontier analysis tool together with my own ramp tests and FTP tests to nail my “easy”, “moderate” and “hard” intensity zones with power, heart rate and breathing. Very powerful- to the extent that pro-cycling teams are doing this now
DI
dip
4 reviews
•
US
Mar 18, 2026
This is an excellent product and provides insightful data on cardiovascular health during exercise. It integrates well with the iPhone and Garmin products. I have been using this for over a year for cycling and running.
DH
Dharmesh
10 reviews
•
GB
Mar 18, 2026
Love the HR monitor, using it for running cycling walking mainly for over a year. Used it to work out my FTP and even impressed my GP. Taking back control of my health from the state and industry.
Why serious cyclists choose Frontier Zone
Wrist-based HR struggles during real rides
Sweat, vibration, movement, climbs, and intervals can reduce wrist-based accuracy precisely when reliable data matters most.
Direct electrical heart signal measurement from the chest
Reliable signal quality during climbs, sprints, and hard efforts
Precise physiological data for training, recovery, and performance
Instant response to changes in effort
Estimates heart rate using optical sensors on the wrist
Signal quality can be affected by movement and wrist position
Reduced accuracy during hard efforts and intervals
Slower response to rapid changes in intensity
Measure what others can only estimate
Features
Other HRM
Smart Watch
The number of heartbeats per minute (BPM), indicating the intensity of cardiovascular effort.
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Evaluates autonomic nervous system health
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Total physiological work based on time spent in various breathing rate zones.
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Training at a defined aerobic intensity that maximizes endurance gains with minimal fatigue.
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Measure how efficiently your body uses oxygen during exercise
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Measures stress on joints and musculoskeletal system
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Measures cardiovascular strain during any activity.
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Get discreet real-time vibration alerts to keep you in the optimal zone.
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Trusted by Elite Marathon Runners and Olympic Athletes
Paula Radcliffe (Former Women’s World Marathon Record Holder for 16 Years)