In back movements, whenever i'm in a set a very peculiar thing happens to me. I have an extremely good mind-muscle connection with my back, so in the first few reps my back gets pumped ALOT(usually by rep 5). I rest-pause my back movements(not to complete failure DC style, but i stop when my form goes to shit). The second rest-pause set it's still pumped. By the third my back essentially deflates. I literally cannot feel it. Even after the set when retract my scapula i feel nothing. The problem with this is i can't gauge whether the third+ rest pause set reps were effective.
This only happens on back movements.
Anyone know what's going on with my back?