The conclusions in particular are fairly bogus. In reality is not going outside per se that helps, but rather increasing external conditions like natural light

The conclusions in particular are fairly bogus. In reality is not going outside per se that helps, but rather increasing external conditions like natural light and air ventilation I would argue that allowing your mind to relax and work on a problem in working memory is the biggest factor here. It would be better if there were any psychology at all in this article, rather than speculation.