Associate
It does look a bit suspect, but is pretty effective in what it does.
There's some research paper testing a small group here:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2971639/
Thanks for that, I am doing something similar with short bar and rope with 1kg weight attached to the end. It's been like this for the last 2 months. I think the exercises from physio made it worst.