Just leave them in the run up position or if getting a young horse ready for backing start to leave them down so they can flap and get young horse used to them.
For single rein lunging then keep the stirrups run up and tidy. For two rein lunging / long reining I use a roller and have the two reins coming from my hands, going through the highest rings on the roller and then straight to the bit. They therefore do not go around the back of the horse and the contact comes to the bit from very near where you hands would be if on board.
Just to add. This is a rescued horse who had been ownerless for a year. Now I know why as he has lots of physical issues but is a sweetheart. He nearly went back but I fell in love with him. So, I'll have a lot more questions and would be grateful of the advice of everyone out there in forum world!!
Thanks everyone. Problem is encouraging bend through the body whilst lunging. Think I'll try the roller and long reining suggestion. He's 11yo and can be ridden.
Good drawing
I do it like that, or I use something like a rug leg strap, or baler twine, to tie from one stirrup to the other under the belly. Very useful when backing as it gets them used the stirrup being there, but it stops them banging around.