I saw this as one of the brief highlights from the ATA Show this year right here on bowhunting.com. I ordered one right away, so much so that the owner emailed me that it would be a few days bc he was still at the show. Anyway, this simple design is absolutely perfect for warming up before shooting and keeping warm while shooting. Reasonably priced, I think it was only $25. In switching over to traditional archery this thing has been perfect for getting used to no let off. I bought the 32lb model and couldn't be more impressed with such a simple piece of equipment that does so much for just working on those muscles for my draw. I think for younger archers it is a good teaching tool and developing good muscle memory.
I found one with options all the way to 110lbs. This is the same concept, just tweaked in design and marketed to bowhunters.
Just simple exercise bands. I do the same thing with personal training clients. The movement is an excellent way to develop upper back and rotator cuff strength. https://www.amazon.com/TheFitLife-E...coding=UTF8&psc=1&refRID=SZRWYREZW9TKZAFA5HT7