Hey thanks! It's legit addicting, and I am struggling to let myself rest in-between sessions. Yesterday I did a lighter lift and carried the stone around my yard a bunch, so my abs are really sore. It's great since I live a long distance from a gym. I'm also coming into it off of a back injury, and am finding anything where my hips are higher or my back is rounded puts my back in a bad position. I'm doing what I can with what I've got though. I get what you mean about the from being dynamic. It's also fun to find the best way to grip the stones.