Summary: A single 30-minute session of moderate exercise can reduce symptoms of depression for at least 75 minutes afterward and may enhance the effectiveness of psychotherapy for people with major depressive disorder.
Source: Iowa State University
New research from Iowa State University finds that 30 minutes of moderate exercise — such as cycling, jogging, or brisk walking — can produce measurable improvements in core symptoms of major depressive disorder for at least 75 minutes after the activity and may boost the benefits of talk therapy.
“Much of the prior work on exercise and mental health has focused on broad measures of wellbeing. We wanted to examine how one acute session of exercise affects the central symptoms of depression,” said Jacob Meyer, professor of kinesiology at Iowa State and lead author of the two studies.
In the primary study, 30 adults experiencing major depressive episodes completed a randomized cross-over experiment. Each participant attended two sessions: one with 30 minutes of moderate-intensity cycling and one with 30 minutes of quiet sitting. Participants completed brief electronic surveys immediately before, halfway through, and after each session, and again at 25, 50 and 75 minutes post-session. The order of cycling and resting visits was counterbalanced across participants.
Surveys measured key depression symptoms — depressed mood, anhedonia (the reduced ability to feel pleasure), and cognitive performance — using validated scales and cognitive tasks such as the Stroop test, which assesses inhibitory control by requiring participants to identify the ink color of a word rather than the word itself (for example, saying “red” when the word “blue” appears in red ink).
Results showed that depressed mood improved steadily during the 30-minute exercise bout and remained improved through the 75-minute post-exercise measurement. Measures of anhedonia also improved after exercise and, although the benefit began to decline by 75 minutes, levels of anhedonia were still better than after resting. Cognitive performance on the Stroop task improved during exercise but was relatively slower at 25 and 50 minutes after exercise compared with the resting condition; no reliable differences were observed on a working memory (2-back) task.
Meyer noted that the positive effects on mood and anhedonia may extend beyond 75 minutes, but a longer monitoring window would be necessary to determine exactly how long benefits persist. He added that the immediate post-exercise period could be a promising window for engaging in psychologically or cognitively demanding activities, including therapy sessions, exams, or presentations.
To explore whether exercise could enhance psychotherapy outcomes, Meyer and colleagues ran a small pilot study. Ten adults preparing to attend weekly virtual cognitive behavioral therapy (CBT) sessions were divided into two groups. One group exercised for 30 minutes at a self-selected moderate intensity (verified with Fitbit data) immediately before their weekly one-hour CBT session. The control group carried on with their usual pre-session routines.
After eight weeks, both groups showed improvement in depressive symptoms, but participants who exercised before therapy experienced larger reductions in symptom severity. Although the pilot sample was small and the researchers did not conduct formal statistical testing, the findings were encouraging: participants who exercised reported stronger and more rapid development of a therapeutic connection with their counselor. The research team suggested that exercise may “prime” the brain, making it easier to engage in emotionally challenging therapeutic work.
The researchers stress that these are early findings that require replication in larger, longer-duration trials. Still, the studies suggest a practical, low-cost strategy that could be integrated into treatment for adults with major depressive disorder: short, moderate-intensity exercise before cognitively or emotionally demanding tasks, including psychotherapy.
“With such a small sample in the pilot, we did not perform formal statistical tests, but the pattern of results is promising,” Meyer said. “Participants were willing to combine exercise with therapy, and exercise appeared to influence both symptoms and mechanisms that support therapeutic progress.”
One key mechanism is therapeutic alliance — the bond and collaborative relationship between client and therapist. Participants who exercised before therapy reported quicker, stronger connections with their therapists, suggesting exercise may help clients engage more readily in the relational and emotional work of psychotherapy.
The research team plans to expand these studies to determine how best to integrate brief exercise into treatment plans for people with chronic depression and to define optimal timing, intensity and behavioral protocols.
About this depression and exercise research news
Author: Press Office
Source: Iowa State University
Contact: Press Office – Iowa State University
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Original Research: Closed access. “Magnitude, timing and duration of mood state and cognitive effects of acute moderate exercise in major depressive disorder” by Jacob D. Meyer et al., published in Psychology of Sport and Exercise (DOI reported in the original publication).
Abstract
Magnitude, timing and duration of mood state and cognitive effects of acute moderate exercise in major depressive disorder
Background
Acute exercise typically improves mood and cognitive functioning in healthy adults, but its specific effects on the core symptoms of major depressive disorder (MDD) are less well understood. This randomized cross-over study examined the magnitude, timing and duration of psychological effects produced by 30 minutes of moderate-intensity cycling versus quiet rest in 30 adults (21 female) diagnosed with MDD.
Methods
Researchers assessed depressed mood using the Profile of Mood States Short Form–Depression (POMS-D), state anhedonia with a Visual Analog Scale (VAS) and the Dimensional Anhedonia Rating Scale (DARS), and cognitive performance with a Stroop inhibition task and a 2-back working memory task. Measurements were taken pre, mid, post, and at 25, 50 and 75 minutes after each session.
Results
Generalized estimating equations revealed significant session-by-time interactions for POMS-D and VAS, indicating small-to-large improvements in mood and anhedonia lasting up to 75 minutes post-exercise (p < 0.05). Effect size ranges reported included POMS (Cohen’s d: −0.69 to −0.95), DARS (−0.02 to 0.16), and VAS (0.33 to 0.83). For cognition, Stroop reaction time improved during exercise but was slower at 25 and 50 minutes post-exercise compared with rest (p < 0.05); no differences emerged for 2-back reaction time.
Limitations
The study sample was small, and measurable psychological effects continued at 75 minutes, suggesting that the duration of benefit may be longer than the period captured here.
Conclusion
Short bouts of moderate-intensity exercise appear effective for reducing key symptoms of MDD, including depressed mood and anhedonia. The period immediately after exercise may be an optimal time to undertake emotionally demanding tasks or psychotherapy, when symptom severity is relatively lower.