Augmented feedback can change body shape to improve glide efficiency in swimming

Curvatures of the body can disrupt fluid flow and affect hydrodynamic resistance. The purpose this study was to evaluate effect a feedback intervention on glide performance torso morphology. Eleven male female national swimmers performed glides before after augmented feedback. Feedback consisted self-modelling visual verbal cuing, manipulate curvatures that Two-dimensional landmark position data (knee, hip shoulder) were used enable computation factor coefficient as indicators efficiency; posture (trunk incline angle); (horizontal velocity). Underwater images manually traced derive transverse sagittal diameters, cross-sectional areas, continuous form outlines (anterior posterior) torso. Maximum rate change in area gradient progressing caudally, calculated for segments: shoulder-chest, chest-waist, waist-hip. Mean velocity, values significantly (p< 0.001) improved due intervention, with large size (d) changes 0.880 (p= 0.015), 2.297 1.605, respectively. Significant gradients related reductions lumbar lordosis chest convexity. provides practical cuing phrases coaches improve efficiency performance.