This project aims to explore the relationship between torso shape and breathing kinematics in modern humans, with an emphasis on its evolutionary significance. A key knowledge gap exists in understanding how the morphology of the human torso influences breathing mechanics and how this relationship evolved in the hominin lineage. To address this, the study employs a novel interdisciplinary approach that combines Optoelectronic Plethysmography (OEP) with 4D Geometric Morphometrics (4DGM). By analysing the motion of 89 reflective markers placed on the torso after exercise, this project seeks to establish a link between torso shape and respiratory function. The findings are expected to offer new insights into both the evolution of the respiratory system and the broader debate of the relationship between anatomical form and biological function. This work also proposes a translational methodology with potential applications in clinical research, particularly in respiratory medicine.