www.ncbi.nlm.nih.gov/pubmed/19131578/
www.ncbi.nlm.nih.gov/pmc/articles/PMC4744893/#s002
motor learning activated by stressor – speed, to adapt to the stressor,result is speed and performance when in speed
i assume it goes both ways and e.g. Zen meditation will slow onedown, also depresion/LH/static job
possible treatment -external speed (treadmill),external speed /pulse measurement
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I speculate that high intensity over continues period of time develops (up regulate) dopamine secretion. that includes brain games