hip arthroplasty 2 knee arthroplasty Humanities 1 Orthopedics 1 Social interaction 1 Surgery 1 active exercise 1 activity 1 aging 1 aquatic 1 arthroplasty 1 balance 1 biomarkers 1 caregiver 1 caregiver strain 1 caregiver stress 1 cerebral cortex 1 chronic low back pain 1 cycling 1 diabetes 1 dyads 1 dynapenia 1 elderly 1 falls 1 global postural rehabilitation 1 hip 1 hydrotherapy 1 hypertension 1 joint replacement 1 knee 1