▁feelings ▁of ▁prof ound ▁content ment , ▁el ation , ▁and ▁well - be ing   – ▁which ▁is ▁col lo qu ial ly ▁known ▁as ▁a ▁" runner ' s ▁high " ▁in ▁distance ▁running ▁or ▁a ▁" ro wer ' s ▁high " ▁in ▁row ing . ▁Current ▁medical ▁reviews ▁indicate ▁that ▁several ▁end ogen ous ▁eu ph ori ants ▁are ▁responsible ▁for ▁producing ▁exercise - related ▁eu ph oria , ▁specifically ▁phen eth yl am ine ▁( an ▁end ogen ous ▁psych ost im ul ant ), ▁ ▁( an ▁end ogen ous ▁op io id ), ▁and ▁an and am ide ▁( an ▁end ogen ous ▁can nab ino id ). ▁ ▁Effect s ▁on ▁ne uro chem istry ▁▁ β - P hen yle th yl am ine ▁▁ β - P hen yle th yl am ine , ▁commonly ▁referred ▁to ▁as ▁phen eth yl am ine , ▁is ▁a ▁human ▁trace ▁am ine ▁and ▁pot ent ▁c ate ch ol am iner g ic ▁and ▁gl ut am ater g ic ▁neur om od ulator ▁that ▁has ▁similar ▁psych ost im ul ant ▁and ▁eu ph ori ant ▁effects ▁and ▁a ▁similar ▁chemical ▁structure ▁to ▁am ph et am ine . ▁Th irty ▁minutes ▁of ▁moder ate ▁to ▁high ▁intensity ▁physical ▁exercise ▁has ▁been ▁shown ▁to ▁indu ce ▁an ▁enorm ous ▁increase ▁in ▁ur inary ▁, ▁the ▁primary ▁met abol ite ▁of ▁phen eth yl am ine . ▁Two ▁reviews ▁noted ▁a ▁study ▁where ▁the ▁average