I just love heavy deads. Unfortunately, I also got my right rotator cuff blown apart in an accident wholly unrelated to lifting. Prognosis is simple: shoulder surgery. This means that I will not be able to pick up much of anything for 4 months and then it will take another several months before I can actually have much load through arm. I do not know for sure how long this will take to get itself sorted out, but pessimism is better.
Nothing works like deads except doing deads, but I figure that there has to be some way I can at least retain posterior chain strength and mass. Much as I hate to say it, I might be stuck with machines (though nothing that loads the shoulders, like a leg press). Maybe go crazy with accessory exercises like hamstring curls, single-leg variations? All of these target glutes and hammies but I can't find anything that would hammer the erector spinae group.
Suggestions? Thanks in advance!