I've build a feature into one of my mods that eatsa stamina whenever you jump. What I did was making a detrimental spell that drains stamina and flaged it with the condition...

GetVelocity z >= 10.0000

...this seem to do the trick, but unfortunately it only works randomly. I've implied a second condition...

IsSwimming == 0.0000

...to make sure not to loose any stamina when emrging from the bottom of a sea

Is there any other condition that works better then GetVelocity? I've tried GetPlayerAction, where 5 seems to be jumping, but it didn't work.

Any idea why this only randomly drains stamina?

Could you track animation events?

Yeah I think tracking animations would be a much better way if you could do it.

Tracking velocity could be iffy, because if the player goes up a very steep slope very quickly it may think they're jumping.

I've tried that...I guess...but I couldn't figure how to do it correctly. Animation is handled via numbers, but the animations don't have any indexed numbers showen, so it's hard to figure which is the one responsible for jumping.

Not totally inappropriate IMHO. *EDIT: On horseback or any kind of vehicle would most likely ruin this. Plus Dragonborn DLC..........

You might be able to ask http://www.gamesas.com/user/793793-verteiron/ about the correct event name. I would try this:

RegisterForAnimationEvent(PlayerRef, "ActionJump")   Debug.Notification("Registered Jump")