A post on /TheRedPill just brought this aspect of increasing SMV to my attention, and I figured I'd ask for some pointers on here in additional to the aforementioned thread.

As I mentioned in said thread's comments, I've found all sorts of "posture improving" videos on Youtube, but I'm looking for something that can explain medically why this exercise is helping improve my posture, or at least back up the exercise with some solid evidence that what I'm doing is helping and not wasting my time.

As someone who has spent way too much time staring at computer screen I'd love some feedback and tips on improving neck posture (although any information on general posture is welcome).