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Iowa State Study Finds Post-Exercise Mood Lift

Handsome young man cycling on the road.

Photo: Getty Images

(Ames, IA) -- Iowa State researchers have found that exercising for half an hour may reduce symptoms of depression for at least 75 minutes after the work out.

“A lot of previous research on the effects of exercise on mental health, in general, have used very broad measures of wellbeing. What we were interested in, specifically, is: how does acute exercise – that is, one session of exercise in a day – influence the primary symptoms of depression,” said Jacob Meyer, a professor of kinesiology at ISU and the lead-author of both publications.

Iowa State's announcin results of two studies. The first involved 30-adults with major depressive episodes. The participants filled out electronic surveys immediately before, half-way-through and after a 30-minute session of either moderate-intensity cycling or sitting, and then 25-, 50- and 75-minutes post-workout. Those who cycled during the first lab visit came back a week later to run through the experiment again with 30-minutes of sitting, and vice versa.

Researchers say during the cycling experiment, participants’ depressed mood state improved over the 30 minutes of exercise and consistently up to 75 minutes afterward.

As for cognitive function, participants who cycled were faster on the Stroop test mid-exercise but relatively slower 25- and 50-minutes post-exercise compared to participants in the resting group. Meyer said more research is needed to understand the variation.

“The cool thing is these benefits to depressed mood state and anhedonia could last beyond 75 minutes. We would need to do a longer study to determine when they start to wane, but the results suggest a window of time post-exercise when it may be easier or more effective for someone with depression to do something psychologically or cognitively demanding,” said Meyer.

A separate, pilot study found exercise enhanced results from therapy session including pronounced reductions in symptoms of depression.

The researchers said the results indicate exercise could help amplify the benefits of therapy for adults with depression.

“With such a small group, we did not perform formal statistical testing, but the results are promising,” said Meyer. “Overall, the pilot study showed people were interested and would stick with the combined approach, and that exercise seemed to have some effects on depression and a couple of the mechanisms of therapy.”

In the pilot study, participants who exercised before the cognitive behavior therapy session reported a quicker and stronger connection with their therapists. The researchers said the findings suggest exercise may be priming or “fertilizing” the brain to engage with more emotionally challenging work that can happen during therapy.

The researchers said they hope to expand on the innovative studies in the coming years to better understand how exercise could be incorporated into an effective treatment or intervention for people experiencing chronic depression.


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