Testing the feasibility of 30 min of daily outdoor office work for stress management: A pilot study.
Per Andreasson, Susanna Toivanen, Feben Javan Abraham and 1 others
PMID 40635619WHAT IT FOUND
Eight office workers rated their stress lower during a week with at least 30 minutes of outdoor work each day (mean 4.42 versus 3.74), but the non-parametric test found no significant difference and only eight people took part.
Key findings
01Self-rated work stress averaged 4.42 in the indoor week and 3.74 in the week with daily outdoor work. The paired t-test was statistically significant (p = .049, one-sided), but the Wilcoxon signed rank test on the same data did not reach significance (p = .104, one-sided).
02Time spent working outdoors rose from a mean of 25 minutes a week to 322 minutes a week (5 minutes a day to 64 minutes a day), almost twice what participants were asked to do.
03None of the work-related stress indices (psychological demands, decision latitude and social support at work) changed significantly between the two weeks.
STILL TO COME
How it was doneWhat they found
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What it does not show
Only eight people took part, so the study is far too small to establish that outdoor working lowers stress. The parametric test was significant and the non-parametric test on the same data was not, so the result depends on which test is used. The outdoor week always came second, and stress was already falling by day 5 of the indoor week, so a general downward drift across the two weeks cannot be separated from the outdoor working. Stress was a single self-rated question, and participants knew what the study was about, so their answers may have been influenced by that. All participants rated their health as very good or fairly good and seven of eight had a university degree, so the findings may not apply to less healthy or less educated workers. Data were collected in Stockholm in October, so colder and darker conditions were not tested. One enrolled participant was excluded because they spent more time outdoors during the baseline week than in the outdoor week, which changes who is included in the analysis. The outdoor week also included a one-hour teaching session and meetings about outdoor working, so more changed than the time spent outdoors alone.
Declared interests
The study was funded by the Knowledge Foundation (grant number 20200068). The authors declared no potential conflicts of interest regarding the research, authorship or publication of the article.
The easy way to misread this
Do not read this as proof that working outdoors reduces stress. The non-parametric test on the same data was not significant (p = .104) and there were only eight participants. The outdoor week always came second, and stress was already declining by day 5 of the first week, so an ordinary downward drift over the two weeks cannot be ruled out.
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