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[[File:RunningDynamics.jpg|right|thumb|300px|Garmin's Connect web site shows the metrics gathered using the HRM4 and [[Garmin Fenix 3]].]]
Many newer Garmin watches combined with a special chest strap (HRM-Run) will provide extra metrics that can give insight into your [[Running Form]]. The Garmin watches will provide these metrics in real time, allowing you to see the effect of changes in your form, similar to other [[Running Sensors]]. There's also a Running Dynamics Pod (RDP) that clips to the back of your waistband. These devices offer a number of metrics include:* '''Cadence'''. My [[Comparison of Cadence Monitors]] showed that the Garmin HRM-Run /RDP provides an accurate measurement of your [[Cadence]]. This is probably the single most important metric in running, and this approach is more accurate than using the accelerometer built into a watch itself.
* '''Vertical Oscillation'''. This is how much the torso moves up and down with each stride. It is generally believed that less [[Vertical Oscillation]] is a better, but I suspect that this is an oversimplification. Some are part of a runners vertical movement is likely to be elastic in nature (consider a bouncing rubber ball), some of the vertical motion will be while the runner is airborne (ballistic), and some of the vertical motion is the deceleration as the runner lands. So it seems likely to me that excessive vertical oscillation is bad, but it's a tricky to know what excessive is likely to be, or how to correct it.
* '''Ground Contact Time (GCT)'''. [[The Science of Running Economy]] generally shows that longer Ground Contact Time is correlated with poorer [[Running Economy]]. I wish that Garmin would calculate and display Ground Contact Time as a percentage of overall stride time, as I suspect this would be a much more useful metric. However, if you're [[Cadence]] is fairly constant this is less of an issue.
* '''Vertical Ratio'''. This is [[Vertical Oscillation]] to Stride Length ratio, and it's unclear what the value of this metric would be. (Supported in Version 2 of Running Dynamics.)
=Watches=
Garmin supports Running Dynamics on several watches, but the metrics have been extended in later versions. Version 1 only supports Cadence, Vertical Oscillation, and Ground Contact Time, while Version 2 added Ground Contact Time Balance, Stride Length, and Vertical Ratio. The Running Dynamics Pod has Version 2, but is supported on an even smaller number of devices.)
{| class="wikitable"
! Watch
! Running DynamicsHRM-Run! Running Dynamics Pod
|-
| [[Garmin 620]]
| Version 1
|
|-
| [[Garmin Fenix 2]]
| Version 1
|
|-
| [[Garmin Epix]]
| Version 1
|
|-
| Garmin 630 (See [[Garmin 235]])
| Version 2
|
|-
| [[Garmin 920XT]]
| Version 2
|
|-
| [[Garmin Fenix 3]]
| Version 2
|
|-
| [[Garmin Fenix 5X]]
| Version 2
| Version 2
|-
| Garmin 735XT
| Version 2
| Version 2
|-
| Garmin 935
| Version 2
| Version 2
|}
