You may also customize all of your heart rate zones since some athletes naturally run above or below the generally recognized standards for age and weight.
Many of us mix indoor and outdoor workouts, and in the past getting your stats from a treadmill workout involved adding and syncing a foot pod sensor.
In addition to built-in heart rate monitoring using optical technology, it has an accelerometer that tracks your daily activity and calorie burn.
Garmin made heart rate training easier in two ways: You don't need to wear (or purchase) a heart rate monitor strap, and Garmin created a very easy-to-see and follow color-coded heart rate training zone display for the watch.
I've found that OHRM is not ready for real world usage.You can also see the lap markers shifted based on direction.(This image has the tracks color-coded for direction, with green coming from the right, blue from the left.) There's a nice teardown of the Garmin 220 (the 225 without the OHRM) on Firstly, you can use a watch on its own, without any kind of Footpod.The lap markers in blue are more widely dispersed than they would be with a better device.(This diagram has tracks color coded with green indicating good accuracy through to red indicating poor accuracy, and the lap markers as blue dots.)This close up section of a zigzag shows the 225 tracking okay most of the time, but a disturbing number of the tracks are poor.It does a little better with the sharp turn seen on the right side of the diagram.