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Exercise also promotes changes in norepinephrine (noradrenaline), dopamine and few other neurotransmitters, some of which are known to affect focus and cognition.

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That would only be short-lived though, no?

And so there’s the case to be made for a regular dose of exercise to promote optimal cognitive function and productivity :-D

Sure, but presumably unrelated to the formation of new neurons.

Sorry, I'm not sure what you mean. Could you please elaborate?

Also, are you familiar with the research/info on the association between exercise and neurogenesis?

https://pubmed.ncbi.nlm.nih.gov/24818140/

https://www.pnas.org/content/108/7/3017.full

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4565723/

The article that I posted as the OP explains the mechanism of exercise-induces neurogenesis but seems to have nothing to do with hericium's suggestion of monoamines.

There were studies showing/suggesting dopamine's relation to neurogenesis. Linked study mentions SEPP1 which can be found in dopaminergic axons so I maybe read too much from it but chained this as: exercise -> dopamine -> other goodies -> ... -> profit

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