Hi Paul, and welcome to the forum. I may not be the best person to respond to your request, and I can't offer a program or liks to one specifically for core work, but I can tell you what I do for lower back and the core. I like doing Deadlifts, Good Mornings, heavy farmers walks, Zerker Good Morning, with the bar cradled in your elbows, knees slightly bent, and bend slowly forward at the waist. I don't do a lot of direct ab work, and I believe I have a pretty strong core. You'll probably find some good info in the article archives, I always do. Best of luck to you!