At boot camp I noticed that some students still have a 'posterior pelvic tilt' (the bottom of the pelvis tilts forward when sitting on the floor).
This is a medical problem and as such we don't offer a fix. However, out of curiosity I researched the condition...
Many of the recommended exercises for fixing posterior pelvic tilt look similar to the ones in the syllabus. In fact, we work significantly more muscles than the recommended 'fix'.
But the exercises have to be practiced with regularity... and the individual needs to sit a lot less.