I keep seeing people do this in my work gym... it involves:
I'm struggling to find an example on the internet, because it doesn't come under obliques, back (upper, middle or lower) from my quick searching.
Anybody have any ideas?
And before anybody asks, no, I have no interest in swapping my barbell workouts for this... 'exercise'.
- Person standing straight with a dumbell in each hand: normally around 2kgs;
- Person then leans from side to side like a weeble.
I'm struggling to find an example on the internet, because it doesn't come under obliques, back (upper, middle or lower) from my quick searching.
Anybody have any ideas?

And before anybody asks, no, I have no interest in swapping my barbell workouts for this... 'exercise'.