Angular motion of the thorax during the golf swing: a comparison of two orientation angle sequences

Résumé fourni par la source

Orientation angles are commonly used to describe complex angular motions of the body. Selecting the most appropriate rotation sequence for a given segment’s motion is crucial. The purpose of this study was to develop a set of generalisable, primary axis-centric sequence selection strategies and to compare the lean direction-lean-rotation (LDLR) sequence, selected for thoracic motion during golf driving based on the strategies, with the conventional rotation-bend-side bend (RBSB) sequence in assessing the level of inter-angle cross-talk. The RBSB method consistently revealed a higher level of inter-angle cross-talk, with substantially larger bi-angle ICC values across all angle combinations. The rotation-side bend and bend-side bend pairs in the RBSB method exhibited the largest ICC values (≥0.837). In contrast, the rotation-lean and lean direction-lean pairs in the LDLR method showed the smallest ICC values (≤0.063). The RBSB sequence demonstrated significantly larger RMS angle ranges (p < .001), indicating a deterioration of the major angle and inflation of the minor angles due to cross-talk. The LDLR sequence realistically portrayed the axial rotation-dominant thoracic motion during the golf drive. The strategies outlined in this study can serve as general guidelines and substantially enhance the applicability of the orientation angle method.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.