Sustained seated postures lead to postural syndromes by inhibiting the diaphragm's ability to descend, which is crucial for respiration and stabilization.

“one of the main things that happens during those developmental milestones with healthy central nervous system maturation is we're able to line keep alignment or approximation of the pelvic floor in the thoracic diaphragm the more efficiently we do that the more efficiently we manage intra-abdominal pressure and uprighting throughout the spine and then again transfer a force and load if we fall into repetitive posturals or postural habituation which as a society is kind of a bit uh prevalent gravity is gonna win no matter how how nice the chair is we're gonna start to fall into that slumping posture and we when we get into that slumping posture the folder the shoulders coming forward that is actually going to create an inhibition of the the diaphragm's ability to descend and again we need that descending of the healthy and ideal descending of the diaphragm for both respiration and stabilization”