I use table leg risers to increase the height of my work table and stand all the way through a wet felted project. The only time I sit to work is when I’m needle felting or stitching into a piece....even then I have been known to use my sewing machine while standing! I was taught by the wonderful feltmaker Annemie Koenen to roll away from the body with palms facing upwards and roll back towards the body with palms facing down. Ive done it ever since and it helps to avoid tension in the shoulders.
I rub against a "turbo" felt board that is like stair tread. I may roll the felt on itself over the board but I don't roll up with bubble wrap or mat and roll 50-100 times etc. I may also throw the felt to full depending on what I make.
I have some foot issues so while I stand to do layout and much of everything and have the table leg risers, I usually sit down to roll. The most comfortable standing height for me is as high as the risers will go and I once pushed the table off the risers while standing and rolling so.... I find that sitting and rolling keeps me quite comfy while I work.