Endorphins are very closely linked to addictions and a mixture of two words:
* 'endogenous' meaning from within the body; and
* 'morphine' a powerful pain fighting drug that is also used and abused for recreational purposes.
The human brain contains its own neuro-chemicals; more potent than heroin, opium and morphine. Endorphins released under stressful exercise create a 'high'. Endorphins are also motivational assisting you feel energized for the rest of the day tingly and as if I am floating - refuelling the body both physically and mentally.
Explained in Section 15 and definitions Overdose Human Induced Drug Only and Adrenaline.