Fall Detection did not activate during workout with 3rd party app

Ultra 1 using the 3rd party app: workoutdoors. I was running and tripped, "super-man"ing into the ground. I notice in my settings that fall detection was turned on "during workouts".

Do I have to use apple workouts to trigger fall detection when fall detection is set to "only on during workouts" or can I use third party apps. The developer was unsure. The nature of my fall causes me to suspect that I just fell too "gracefully" to trigger the fall but the setting is unclear.