Misconceptions

On my way to school today, i saw some group of students jogging and singing in the same uniforms so i said to my self" this people are jobless " ...what do i know concerning thier activities despite that i recognized someone amongs them,after they had finished i walked up to him and asked why are u people shouting and jumping then he said to me we all are doctors by profession and involving in physical activity helps to keep steady heart beat rate and gives good blood circulation then he also mentioned that a physically fit person does not get ill that easy. So people involving one self in a physical activity is not a waste of time. It is actually good for the body system