The worst part is, you can't even sleep through most of it. Any lucid self-training will have no effect, as without feedback from the body, you could be teaching yourself skills that don't work with your body. Ever just know how to fly in dreams, without fail, and it seems to be consistent between dreams? Congratulations, you learned a skill that cannot be used in reality, wasting the neural pathways that could have been spent learning how to perform a windmill kick, how to tie a lure, or how to twirl a knife.