[p0nce]

> 3. Has anybody found ways to improve their problem-solving skills? Or critical thinking?

For me nothing ever beats running and the associated runners's high. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4915811/

Probably you could analyze how so-called β-hydroxybutyrate is synthesized and eat precusors too before going.

[throwaway2037]

I agree: For me, the primary focus of exercise is high intesity to trigger huge dopamine releases ("runner's high"). It is my legal drug of choice. Plus, I try to visualise past high quality athletic performances to get my mind in the right place. Running / cycling / swimming (tri-) helps me the most, but I heard that people can also trigger huge dopamine releases through strength training -- hitting new max weights is very inspiring to them.

[ironlake]

I never get a high from running or any other kind of exercise.

[tumetab1]

For me getting "high" from running is pretty hard. Bicycle rides in the other hand, pretty easy... just need to pick some speed :)

I bet some people get "high" on messing others lives :D you just need to seek yours :)