Hello evel288,
Thank you for reaching out to Apple Support Communities.
We were able to find this:
"Running form metrics
There are a number of metrics to help you get the most out of your running workout.*

Vertical Oscillation: Tap to add an estimate of how much your body travels vertically as you run in centimeters. This measurement, along with stride length, can give you a sense of how much energy you’re using to drive upward versus forward. Apple Watch can log your vertical oscillation automatically during outdoor running workouts.
Running Stride Length: Tap to add an estimate of how much distance you cover from one step to the next while running in meters. Along with cadence, stride length determines your overall running speed. Apple Watch can log your running stride length automatically during outdoor running workouts. For the best Stride Length estimates, run for approximately 200 meters to calibrate your Apple Watch.
Ground Contact Time: Tap to add an estimate of the time each foot spends touching the ground while running in milliseconds. Apple Watch can log your ground contact time automatically during outdoor running workouts."
More details can be found here: Run with your Apple Watch
If you are still having issues, can you provide a few more details? What is your exact watchOS version? Have you calibrated your Apple Watch? Also, which iPhone and iOS version are you currently using?
Cheers!