UPDATE: This model has been discontinued. For information on current models, check out our GPS for runners page.

The Garmin Forerunner 405CX updates the Forerunner 405, increasing accuracy in heart rate-based calorie computation. Using algorithms developed by exercise scientists and world-class athletes, the Forerunner 405CX monitors the micro changes in a user’s heart rate and uses that detailed information to better calculate the number of calories burned during aerobic activity. read more