mood depression 5 aging 4 anxiety 4 exercise 4 mental health 4 older adults 4 attitudes 3 depressive symptoms 3 emotions 3 physical activity 3 pregnancy 3 risk factors 3 stress 3 systematic review 3 Humanities 2 STAI 2 Social interaction 2 balance 2 brain 2 caffeine 2 children 2 coffee consumption 2 cognition 2 cognitive 2 cross-sectional study 2 diet 2 frailty 2 health 2 hippocampus 2