Enhance your triathlon experience by pairing HRM-Tri with your Forerunner® 920XT1 (forerunner not included). The HRM-Tri stores heart rate data when underwater, then forwards it to the device. Our smallest and lightest module fits within the width of the strap. Its soft, rounded edges and covered seams make the strap super-comfortable out of the water, too.
Running Dynamics
HRM-Tri also has an accelerometer in the module that measures torso movement to calculate 3 running metrics:
Running dynamics features are available only on the Forerunner 620/920XT and fēnix 2/3. HRM-Tri is compatible with several other fitness products but will only display heart rate when paired.
For a full list of compatible devices, checkout out Garmin Website
Why do people put their bodies through the torture of a triathlon?
It can't be for the medals, they're essentially worthless.
And once you've completed one, you've sort of completed them all. A swim then a ride then a run. Again and again and again.
There's only one reason we can think of in favour of triathlons: they justify the need for ultra-cool gadgets like this.