The Effects of Increased Midsole Bending Stiffness of Sport Shoes on Muscle-Tendon Unit Shortening and Shortening Velocity: a Randomised Crossover Trial in Recreational Male Runners

摘要

Schematic of the sagittal plane model used to estimate the arch angle (AA) using markers placed on the medial heel (MH), navicular tuberosity (NT), and distal head of the first metatarsal (MP1). The shank muscle-tendon unit (sMTU) was estimated along the orientation of the shank. sMTU force (F ) was calculated based off a musculoskeletal model [ ] and in vivo ultrasound imaging of the sMTU moment arm (MA ). The plantar muscle-tendon unit (pMTU) was estimated spanning from MH to the great toe (GT). pMTU force (F ) was approximated using vertical ground reaction forces and F [ ]. Modified from [ ]