Physical excercise

I think physical excercise should be a required part of every school day. Students might not concentrate on academic studies for all day, so physical excersise will be a good time for students to rest. They need to study hard of course, but only academic studies make them stressful. Physical excercise can meke deeper frriendship through practices or games. Concentration for physical excercise would be for academic studies. Thus we should require physical excercise every school day.