Nature walk,
does it really help with Immediate improvement in working-memory performance?
research showsThe grade is C with 52 points. Twenty adults with major depressive disorder completed nature and urban walks one week apart, with 19 analyzed. The backward digit-span time-by-environment interaction was F(1,18)=20.5, P<.001, partial eta-squared 0.53, a large effect by statistical convention. This was a single-session, small trial whose registration status could not be verified from the paper, and it cannot establish sustained cognitive improvement or treatment of depression.
ads claimA better working-memory test immediately after a 50-to-55-minute nature walk is not proof of depression treatment, long-term memory recovery, or medication replacement.
Useful facts when choosing a product
- Both nature and urban routes were 2.8 miles and 50 to 55 minutes, with GPS confirmation.
- Walk order was counterbalanced and no significant order effect was found.
- Partial eta-squared was 0.53 for the working-memory interaction, but only 19 participants were analyzed.
What the research actually shows
Of 20 adults with clinician-confirmed major depressive disorder, 19 were analyzed. Each participant completed a 2.8-mile, 50-to-55-minute arboretum walk and an urban walk one week apart, with GPS confirmation. Order was counterbalanced and was not a significant predictor when included in memory and mood analyses. A two-by-two repeated analysis compared pre-to-post change by location. Registration status and a prespecified primary endpoint could not be verified from the paper. NIMH and TKF Foundation supported the work, and the authors reported no conflicts.
Why this is classified as C (52)
A large immediate effect in an active-control counterbalanced crossover supports the narrow claim, but this was one single-session study of 19 people and registration status could not be verified from the paper, giving C with 52 points.
Counterpoint. Immediate working memory versus an urban walk is not treatment of depressive symptoms or sustained cognition.
Rejudgment record. Cross-check applied — Cross-checked analyzed sample, active urban comparator, route length, counterbalancing and order-effect analysis, test statistic and effect size, registration, and funding in the original paper
| Endpoint | P | Patient-reported treatment goal - the symptom is the goal |
| Replication | R1 | Single confirmatory trial |
| Independence | I2 | Decisive evidence is publicly or non-profit funded |
| Effect size | E+ | Meets the clinically important threshold |
The scoring table and the verdict agree (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Immediate working-memory improvement after a nature walk | C | Partial eta-squared was 0.53 versus the urban walk. |
| Sustained working-memory improvement | ? | The trial measured only the immediate post-walk period. |
| Treatment of depressive symptoms | ? | The positive endpoint in this verdict was a working-memory task, not a depression scale. |
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Study 1 | Counterbalanced active-control crossover trial | 19 | NIMH grant MH60655 and TKF Foundation | Immediate post-walk backward digit-span working memory | Time-by-environment F(1,18)=20.5, P<.001, partial eta-squared 0.53; no significant order effect. | Pivotal single immediate-effect evidence |
Receipt — 1 References
All 1 cited sources were verified for existence at the original page (as of 2026-08-04).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-08-04 · Corrections: none
Cite this verdict
[Chamgap] Nature walk x working memory in adults with depression — Evidence Grade C·52. 1 cited sources checked. Source: https://chamgap.com/en/verdicts/cognition/nature-walk-depression-working-memory/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
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