For low mood after 65, the best exercise is whichever one you'll actually do

Exercise is recognised as an allied health strategy for managing depression in older adults, but guidance has been vague on which kind. Aerobic sessions, resistance training and mind-body practices such as tai chi or yoga demand different equipment, settings and temperaments, so knowing whether one outperforms the others would shape what gets recommended. Until now, the relative effectiveness of these modalities had not been tested against each other at scale. This analysis was designed to close that gap.

The reviewers searched seven databases from inception to September 12th, 2019, for randomised controlled trials that enrolled adults with a mean age of 65 or older, compared at least one exercise intervention arm, and used validated measures of depressive symptoms. The systematic review captured 82 trials, of which 69 were eligible for the network meta-analysis, covering 5,379 participants. Network meta-analysis combines direct and indirect evidence, allowing exercise types to be ranked against one another even where few trials compared them directly. The analysis also controlled for inherent variation in the trials' control groups.

Every exercise type was effective compared with control conditions, with pooled effects ranging from small to moderate. In the head-to-head comparisons, no modality separated itself: resistance versus aerobic, mind-body versus aerobic and mind-body versus resistance were all statistically comparable, with wide intervals around each estimate. Compliance was high across all three exercise treatments. In short, the analysis found equivalence rather than a winner.

The result coalesces with earlier findings in clinically depressed older adults and extends them across a much larger evidence base. Equivalence is a genuinely useful finding here because it removes a barrier: nobody needs to be steered toward a modality they dislike on effectiveness grounds. The wide prediction intervals mean a modest advantage for one type cannot be entirely excluded. Questions about optimal dose, duration and intensity within each modality remain open.

For anyone over 65, or supporting a parent who is, the practical message is that the choice between walking, lifting and tai chi style movement can be made on enjoyment, access and preference rather than on which is scientifically superior for mood. High compliance across all three types suggests older adults stick with exercise when it suits them. The effects were small to moderate, so exercise here is a helpful tool rather than a cure. The best exercise for depressive symptoms appears to be the one that actually happens.