Garmin HRM-Tri

Running Dynamics

HRM-Tri has an accelerometer in the module that measures torso movement to calculate 3 running metrics:

1. Cadence — the number of steps per minute. It displays the total steps (right and left combined).
2. Vertical oscillation — the bounce in your running motion. It displays the vertical motion of your torso (measured in centimeters).
3. Ground contact time — the amount of time in each step that your foot spends on the ground while running (measured in milliseconds).

Running dynamics features are available only on the Forerunner 735XT, 620/920XT and Fēnix 2/3. HRM-Tri is compatible with several other fitness products but will only display heart rate when paired.

HRM-Tri is designed for running, biking and open water swimming.

• Bike rides, runs and bricks

• Open water swimming

• Multisport activities (for example: run to the lake, swim, and run home)

• Race day for a typical triathlon with open water swim

For pool swimming, HRM-Swim is recommended. It has a unique non-slip design that keeps it in place during push-offs and withstands repeated exposure to pool chemicals.

• Designed for running, cycling and open water swimming
• Very comfortable design (small and light)
• Designed with rounded edges and no exposed seams
• A simple bi-fold adjustment reduces elastic weight and makes sizing easy
• Stores up to 20 hours of heart rate data during swims
• Real-time heart rate to the watch when the monitor is out of the water
• Running Dynamics
• Battery life up to 10 months (assuming one hour/day use) with user-replaceable CR2032 battery