The best heart rate monitor we tested, the Garmin HRM-Pro plus offers a wealth of multisport insights for competitive triathletes…

For a full roundup, check out the best heart rate monitors

Garmin HRM-Pro Plus


$129.99 / £119, 


  • Good accuracy 
  • Running, cycling and swimming insights 


  • Not rechargeable 
  • Expensive 

Comfort: 4/5
Accuracy: 5/5
Tracking features: 5/5

The top-tier HRM-Pro Plus is Garmin’s rival to the Polar H10 and the Wahoo TICKR X. At 52g, it’s a shade lighter than the Polar H10, though you don’t notice the difference. Like the H10, it has a small, lightweight sensor module that fits within the width of the soft, comfortable strap, making it one of the less intrusive chest straps to wear, even for longer training sessions. 

The HRM-Pro Plus runs off a CR2032 watch battery that lasts around 12 months if you train an hour a day on average. That’s shorter than the TICKR X at 500 hours and marginally less than the Polar H10 at 400 hours. But it’s still substantial.   

Garmin HRM-Pro Plus design

While old Garmin straps had you reaching for a tiny screwdriver to change the battery, the Pro Plus now has an easy-access design that makes swapping the battery hassle-free, with no tools required. We still like to see more environmentally friendly rechargeable options though.

Connectivity is on a par with the other leading chest straps. It supports three concurrent Bluetooth connections plus unlimited ANT+ connections with a 3-metre range. So you can pair multiple devices including a GPS watch, cycle computer, fitness app, gym equipment and/or a training service like Peloton or Zwift.  

Accuracy is excellent with little to choose between the performance of this and the Polar H10. But what really sets the HRM-Pro Plus apart are the additional running dynamics, including vertical oscillation, ground contact time, stride length, vertical ratio, pace and distance data. You can broadcast that added intel via ANT+ to your watch or use it to enhance your treadmill stats.  

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Beyond running, it also captures steps, calories burned and intensity minutes independently from your watch. So you can workout, store the data and then share it direct to the Garmin Connect app or your watch when you put it back on. For swimmers, the HRM-Pro Plus also serves up swim interval heart rate stats without your phone nearby.