जिबआरि थाखो मोनसेयाव बेयो फोरमाय - जाबोबायदि केतकल'मिनसनि गोसारनायाव खमायनाय आरो बेता एनदरफिनआव बारायनाय दं जाय ब्याम मोनखौ उनसंनाय समाव जाखाङो ।
It has been explained on a biological level that there is a decrease in circulating catecholamine's and increase in beta endorphins that occur during and following an exercise .