Diagonal pelvic tilts on the Core-Tex Sit may appear simple, but they’re often one of the most challenging and rewarding movements to master. While many users quickly get the hang of front-to-back and side-to-side pelvic motions, moving on a diagonal requires a higher level of motor control and body awareness—especially when it comes to isolating pelvic and lower back movement from the rib cage and upper torso.