Estimation 2 Force estimation A-mode ultrasound 1 A-mode ultrasounds 1 Activity sensing 1 Angle hip and knee 1 Biomedical signal processing 1 Biophysics 1 Clinical research 1 Drop height 1 Drops 1 Electromyography 1 Feature extraction 1 Features extraction 1 Force 1 Force predictions 1 Forecasting 1 Functional data analysis 1 Ground reaction forces 1 Hip and knees 1 Landing 1 Mathematical modeling 1 Mathematical modelling 1 Modeling principles 1 Muscle 1 Muscle activities 1 Muscle activity sensing 1 Muscles 1 Noninvasive medical procedures 1 Parachute landing fall 1