The main purpose of this study was to investigate the association of the MX metrics and various clinical tests including Late-Life Function and Disability Instrument (LLFDI) outcomes, 6-min walking test (6MinWT), 4-meter walking test (4MWT), Short Physical Performance Battery (SPPB), and hand grip (HG) strength. To this end, we analyzed the Proximal Femoral Fracture (PFF) cohort from the baseline assessment (T1) of the clinical validation study (CVS) of the Mobilise-D project.