Climbing without moving, how do you say that? Running without moving on a treadmil would be running in place, but climbing on a sort of treadmill would be climbing in place? Is that an idiom, or there's no set idiom for this?
"Running in place" means making running motions without moving forward, rather than on a treadmill. In British English the expression is "running on the spot". When you are on a treadmill you "run", you don't "run in place".
That's a fairly normal thing to do. I can't imagine how one would make climbing motions up a wall without climbing. I've found a few "climbing treadmills", but just as with regular treadmills, you don't "climb in place" on them, you just "climb".
So there is no idiom for this as a literal activity. Perhaps you want to use this as a metaphor "climbing the business ladder without getting any higher". I think you just need to say "climbing without moving". Perhaps "climbing in place" would be understood as an analogy.
I feel like I'm "climbing in place" at XYZ corp. My job title changes, but I don't get any more responsibility or better pay.
But as a metaphor, "running in place" or "running on the spot" is better.