Electromyography EMG Enaction Shear modulus Force platform Cours d’action Force Expertise Training Performance Physical activity Elastography Lower limbs Major depressive disorder Interpersonal coordination Breast cancer MRI Depression Fatigue Mechanical properties Supersonic shear imaging Aged Surface electromyography Force-velocity relationship Pedaling Cours d'action Biomechanics Neuromuscular fatigue Treatment Isokinetic Quality of life Muscle activation Ultrasonography Humans Kinematics Low back pain Motor units Course of Action Fatigability Hypertonic saline Postural control Interactions Knee Walking Gait analysis Passive torque Quadriceps Ultrafast ultrasound Gait Microcirculation Common drive COPD Plantar flexors Stiffness Muscle Maximal power Ageing Achilles tendon Running Cognition Obstetric anal sphincter injury Shear wave elastography Elderly Physical education Torque Reliability Aging Gastrocnemius Muscle contraction Cancer-related fatigue Balance Children Overweight TDCS Knee extensors Muscle synergies Elasticity Sport Obesity Pain Exercise Adult Communal coping Stretching Coherence Tendon COVID-19 Pregnancy Male Female Course of action Lengthening contraction Muscle fatigue Power Muscle coordination Electromechanical delay Muscle strength Rehabilitation Cycling Ultrasound