Splits/methods for hard labour workers

Anyone here with active and often heavy labour job, how do you train with all of that and still manage to make gains and recover well? I started working like this couple of months ago and all that I do nutrition and training wise don't work anymore and my recovery is pretty bad. I also work 3 shifts and my sleep, diet and workout patterns is changing every week. I hope that I will find better job in the future but for now I have to change something and if anyone have same problems like me what was your training like?