Casey Darwin wrote:
Keep tension in your forward arm as that keeps you from collapsing which hurts your shoulder.
I'd say ex
tension rather than tension.
In any case, I'd also say there doesn't need to be much in the arm after you get used to rolling, as there comes a time that if you need to rely upon arm strength to keep from having your shoulder get hurt, there are other means of taking that roll/fall which are most likely safer. That said, I think it's beneficial to have the "shape" at the beginning, though, especially when learning to roll...