Outdoors was not the ingredient. Somewhere good was.
In Detroit, 112 people wore GPS trackers for a week. More time active outdoors went with worse anxiety and depression. Time in parks went the other way.
Suggestive but preliminary. Not settled. how we score evidence
Caveat on this rating: One city, 112 people, one week of measurement, analysed cross-sectionally - this is a signal to take seriously, not a settled result, and the badge reflects that. The direction is what matters: the authors write that these findings "contrast many studies showing positive relationships between time outdoors and mental health and highlight the need for research with diverse populations and better measures of outdoor conditions and intentionality of greenspace contact." Reverse causation is unexcluded here too: people already anxious may move differently. The reading this row supports is that "outdoors" is not a single exposure, not that being outdoors is harmful.
In Detroit, researchers put GPS trackers and movement monitors on 112 people for a week. More time active outdoors went with worse anxiety, depression and stress - not better.
Significant findings
Almost everyone in the study was Black, and the neighbourhoods included blocks with many vacant houses and empty lots.
Time in parks went the opposite way. Anxiety was lower.
Same city, same outdoors, opposite results - depending on where you actually were.
Most nature research relies on what people remember, in wealthier and whiter areas. This one measured where people actually went, and found the reverse.
Worth asking
Green space is not handed out evenly. If there is no safe park near you, that is a fact about your city, not about you.
Getting outside is hard for plenty of people. A disability, someone to care for, a night shift, a street that does not feel safe.
None of that is a failure on your part.
A window, a balcony, five minutes on a doorstep. It still counts.
Source
Outdoor physical activity is not associated with better mental health in a sample of predominantly Black people, but spending time in parks is — Pearson AL, Liu W, Lin Z, Horton TH, Roberts JD, Chambers T, Shortridge A, Pfeiffer KA, Gardiner J (2024)
Indexed peer-reviewed journal
Read the source: https://doi.org/10.1016/j.ufug.2024.128558
DOI: 10.1016/j.ufug.2024.128558
How this was scored
- Study design
- Cross-sectional study / survey
- Funding
- Independently funded
- Published in
- Indexed peer-reviewed journal
- Sample size
- 112
- Preregistered
- No
- Conflicts disclosed
- Yes
- Independent of proponent
- not recorded
- Retracted
- No
Read the full scoring rubric, including what it can't tell you.
Published August 31, 2026.
Questions
How strong is the evidence behind this?
Resolv rates this source "early signal". Suggestive but preliminary. Not settled. It scores 53 out of 100 on our published rubric. One caveat travels with that badge: One city, 112 people, one week of measurement, analysed cross-sectionally - this is a signal to take seriously, not a settled result, and the badge reflects that. The direction is what matters: the authors write that these findings "contrast many studies showing positive relationships between time outdoors and mental health and highlight the need for research with diverse populations and better measures of outdoor conditions and intentionality of greenspace contact." Reverse causation is unexcluded here too: people already anxious may move differently. The reading this row supports is that "outdoors" is not a single exposure, not that being outdoors is harmful. The score is calculated from recorded facts about the source — study design, funding, publication venue, sample size, preregistration — not typed in by an editor.
What is the source for this?
Outdoor physical activity is not associated with better mental health in a sample of predominantly Black people, but spending time in parks is — Pearson AL, Liu W, Lin Z, Horton TH, Roberts JD, Chambers T, Shortridge A, Pfeiffer KA, Gardiner J (2024). Published in: Indexed peer-reviewed journal. DOI: 10.1016/j.ufug.2024.128558. The full source is linked on this page so you can read it yourself.
Who paid for this research, and does that matter?
Study design: Cross-sectional study / survey. Funding: Independently funded. Independence from the proponent is not recorded. Industry sponsorship is one of the most reliably measured biases in medicine, which is why funding carries real weight in the score rather than sitting in a footnote.
Is this medical advice?
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.