Talus shape predicts subtalar running kinematics in minimalist shoes

Footwear development often emphasizes the need to optimize for fit and performance. One potential factor affecting both aspects is foot shape. When considering foot shape, we generally quantify the external shape (e.g., Schuster, Cresswell & Kelly, 2023). However, it is the shape of internal structures (e.g., bone), that most likely affect both the fit and function of the shoes we wear and is also driving external shape. As a first step to understanding how internal skeletal shape and function might affect footwear fit and performance, we applied novel musculoskeletal imaging technology and statistical shape modelling to determine the relationship between talus bone shapes and subtalar joint motion whilst running in minimalist shoes.