The reciprocal relationship between physical activity and depression: Does age matter?

Area of Science:

• Gerontology
• Psychiatry
• Public Health

Background:

• Physical activity (PA) and depression prevalence fluctuate across the lifespan.
• Investigated the moderating role of age on the association between PA and depression.
• Explored sense of mastery and functional limitations as potential determinants of age-related differences in PA and depression.

Purpose of the Study:

• To examine if age moderates the relationship between physical activity and depression.
• To determine if sense of mastery and functional limitations influence age-specific effects of PA on depression.

Main Methods:

• Recruited 1079 patients with major depressive disorder (aged 18-88 years).
• Assessed depression diagnosis, severity, and PA at baseline and after a two-year follow-up.
• Employed linear and logistic regression analyses, including interaction with age.

Main Results:

• PA at baseline predicted depressive disorder remission (OR=1.43), an effect not moderated by age.
• PA improved depression symptom severity in younger adults (p=.022) but not older adults (p=.128).
• PA levels were stable over time and not associated with depression, mastery, or limitations at follow-up.

Conclusions:

• Age did not moderate the effect of PA on depressive disorder remission.
• Sufficient PA independently predicted depressive symptom improvement in younger adults over two years.
• PA levels remained largely consistent, unaffected by the tested determinants.