I searched for this as I wanted to know the answer to feeling so fine after running .. 

Perhaps the biggest benefit of a great 10-K is that, post run, you're sure you could score 1,600 on the SATs (2,400 if you're under 25) —or at least improve. "Running increases levels of positive neurotransmitters, like endorphins; norepinephrine, which is responsible for alertness; and serotonin, which helps regulate mood," says Fitzgerald. "Plus, running puts the brain in an 'alpha-wave' state, which is associated with feelings of calmness and well-being." A handful of studies have documented that moving your feet correlates with improving your brain; two conducted at the University of Illinois found that 30 minutes of exercise resulted in up to a 10 percent improvement in cognition, or being more effective in processing a problem or situation. Maybe that stellar score isn't out of reach.

Deborah McTaggart is a registered nutritionist practising in Barnes, South West London, and global via Zoom. She works with corporate nutrition and individuals on healthy eating, with a special interest in Men's Health, Shift Work Health, Travel Health and Avoiding Jet Lag. Contact me here for further information on nutrition plans.