Outdoor aerobic exercise may provide greater therapeutic advantages than indoor aerobic exercise for adolescents with subthreshold depression
This randomized controlled trial protocol aims to compare the psychological effects of indoor versus outdoor aerobic exercise in adolescents with subthreshold depression. The study will recruit adolescents meeting standardized subthreshold depression screening criteria and randomly assign them to an indoor or outdoor aerobic exercise group for an 8-week program (2-3 sessions per week, 40 minutes per session at moderate intensity). Depressive symptoms, anxiety, and sleep quality will be assessed at baseline, mid-intervention, and post-intervention.
This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.
Outdoor aerobic exercise may provide greater therapeutic advantages than indoor aerobic exercise for adolescents with subthreshold depression The current body of evidence comprises 1 study, including 1 randomized controlled trial. EvidenceHub rates the overall confidence at 42/100 (low).
The Claim
Outdoor aerobic exercise may provide greater therapeutic advantages than indoor aerobic exercise for adolescents with subthreshold depression
This conclusion is most relevant to: Adolescents with subthreshold depression.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Does the exercise environment matter? Indoor versus outdoor aerobic exercise for adolescents with subthreshold depression: a randomised controlled trial protocol. (BMJ open, 2026) —
How It Works
The proposed biological pathway:
- ▸Exercise improves cardiorespiratory fitness
- ▸Exercise modulates neurobiological pathways related to mood
- ▸Environmental context (indoor vs outdoor) may influence psychological engagement and stress reduction
- ▸Result: Potential differential effects on depressive symptoms, anxiety, and sleep quality
Who Might Benefit
Evidence fit by population:
- ▸Adolescents with subthreshold depression
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸The study is a protocol and results are not yet available; no empirical evidence is provided
- ▸The abstract does not specify blinding of participants, which may introduce bias in subjective outcomes
Frequently Asked Questions
What is subthreshold depression in adolescents?▼
Subthreshold depression refers to depressive symptoms that do not meet the full diagnostic criteria for major depressive disorder but still cause significant distress or impairment, and is common in adolescents.
How is exercise intensity controlled in this study?▼
Exercise intensity is controlled using heart rate monitoring to ensure both indoor and outdoor groups perform moderate-intensity aerobic exercise consistently.
What outcomes are being measured?▼
The study measures depressive symptoms, anxiety, and sleep quality at baseline, week 4, and week 8.
Why might outdoor exercise be more beneficial than indoor exercise?▼
The study hypothesizes that environmental context may modulate psychological benefits, potentially due to factors like natural light, green space, and reduced stress, but empirical evidence is still scarce.
References
- 1.Liu G, Gong F, Yu J, Wang S, Chen D, Zhang Q. “Does the exercise environment matter? Indoor versus outdoor aerobic exercise for adolescents with subthreshold depression: a randomised controlled trial protocol..” BMJ open, 2026. PMID: 42521315 DOI: 10.1136/bmjopen-2025-114856