Never tense. If you are engaging your "abs" it means your postural abs - the deepest layer (TAs). When these are engages they do tighten - very slightly - like putting a little tension on strtechy fabric. And the ah-ha is that if you have engaged the right muscles the belly at the side pulls in very slightly.Also I hear that word "engaged" a lot. Does that mean to keep it tense? I'm trying to be loose and tight at the same time o
:lolgisela
Yes. My mistake, piston*. Any tips?