Good one,

I shoot a back tension release aid. I know I can trick it if I want, but when I shoot it with back tension, it's much more consistent. I know recurve technique is different and I feel more difficult to feel your back.

I simply come up to full draw with a very relaxed forearm, trying to avoid tension in any part of my draw arm. At anchor, I settle, aim and follow through with my back. All I have to do is keep adding pressure to by bow hand and squeeze with my back, and bingo! it goes off. It's taken a who year of shooting to get this right. And yes I do use my back muscle because I have been spotted by my coach who can feel it. I can feel it too. It's just practice. I have only just sorted the technique recently. But it really helps to remove tension, and the whole shot sequece is less demanding and just "easier" the back muscles are very strong and underused. I find the best way to get the back muscles doing the job is to relax the forearm. A wrist release aid is great for this, I don't use one, but great to get used to the "feel". I feel the Foremaster training aid will be of great value to recurve archers as you have to use your back to use it.
A lot of people give up too soon on back tension, probably due to the difficulty in finding it. The effort is well worth it in the end.

I could add more but it's one of thoses difficult things to describe