One big concern for me in this article is, the MRI scans were not taken during the start of the study. But, I couldnt eliminate this because the pattern (of reduced white matter in brain) seem to hold true across the pool of 1700 people.

Most curious part of in this article is the active vs passive sitting distinction. Occupational sitting (or performing intellectual activity while sitting) correlated with better brain scans and white matter.

This makes sense, if I view it as consumption vs processing thing.

TV is pure consumption, Intellectual work requires output and creation.

If this thesis holds, the rise of AI tools is a bit concerning for knowledge workers. We are shifting from active creation (writing code, writing articles, designing, etc) to passive consumption and curation (reviewing AI generated content).

Will be interested to learn more on how this study unfolds further.