> Conclusions: Physical exercise positively affects mood and cardiovascular fitness, but does not lead to long-lasting changes in plasma levels of kynurenine and KYNA in patients affected by mild-to-moderate depression.
So that would suggest that the body just reaches a new equilibrium. Again, the point is that resilience does not fix causes - it could be that this is similar to trying to fix traffic jams with more roads; the only real fix is to get rid of the cars as much as you can (after which having an extra lane can make traffic go smoother).
> Both papers you cite are by the same group, and I don't think the results represent a consensus of the experts.
IIRC, that kynurenine does something is apparently well-established, and not just by this group. Also, that first paper has quite a few citations, you can check for follow-up research on Google Scholar[1]
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5384718/
[1] https://scholar.google.de/scholar?hl=en&as_sdt=0%2C5&q=Skele...
This is another degree of freedom in the theory, right?
I mean, this could all be true for all I know, but as an outsider I think this falls into the category of stuff I can't judge, and (like a thousand other theories investigated by experts and published in impressive places like Science) hasn't yet risen to the level of consensus.
Both papers you cite are by the same group, and I don't think the results represent a consensus of the experts.