Fig. 1
a Example setup for kinematic analysis and location of the ultrasound. b Colocation of the ultrasound transducer in the medial gastrocnemius (MG). c Region of Interest (ROI) and automatic selection of pixels in the deep fascia of the MG. d Representation of one pixel in ROI for calculated Euclidean distance (dt) between the position in time t (ptx, pty) and the initial frame (p0x, p0y)