Mind and Body, Τόμος 30

activities American arms Association athletics average backward ball become beginning believe better blood body boys called cause child City College condition course dancing Director disease effect exercise experience fact field foot forward four girls give given grade gymnasium gymnastics hand heart height High School Hygiene important increased individual interest Jump living means measure meeting mental methods mind movement muscles nature normal organization passed period person physical education physical training play playgrounds position possible posture practice present pupils recreation Repeat rest rules side sideward sport stand standards step swing teachers teaching tests things throw tion turn University women York