It is produced when exercising, either cardio or anaerobic.
And as a side note - prolonged cardio is detrimental for health. It puts body into inflammation state (inflammation markers are present in blood of those exercised daily about 90 min with medium to high intensity). You have to have to do resistance training to make hormonal levels more balanced.
So the best training for mind is an interval training.
The key ingredient here is BDNF: http://en.wikipedia.org/wiki/Brain-derived_neurotrophic_fact...
It is produced when exercising, either cardio or anaerobic.
And as a side note - prolonged cardio is detrimental for health. It puts body into inflammation state (inflammation markers are present in blood of those exercised daily about 90 min with medium to high intensity). You have to have to do resistance training to make hormonal levels more balanced.
So the best training for mind is an interval training.