A dysfunctional diaphragm can contribute to lower back pain. Since the diaphragm is part of the intrinsic core along with the TVA, pelvic floor, and multifidus, if any muscle involved in the extrinsic core, like the rectus abdominis, psoas, obliques, etc becomes weakened, the diaphragm and compensate and tighten, leading to back pain. NKT often finds the diaphragm overactive and the psoas and abs underactive. This article details how strengthening the diaphragm can rehab the core muscles.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6276912/
(David Weinstock)












