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