meta-analysis Medicine 20 systematic review 18 obesity 11 physical activity 11 biomarker 10 inflammation 10 Research & information: general 8 mortality 8 Biology, life sciences 7 aging 7 depression 7 epidemiology 7 hypertension 7 machine learning 7 Humanities 6 Social interaction 6 cancer 6 children 6 diet 6 older adults 6 oxidative stress 6 pain 6 sarcopenia 6 survival 6 COVID-19 5 anxiety 5 artificial intelligence 5 biomarkers 5 cardiovascular disease 5