VO2 max is gold standard for measurement of cardio respiratory fitness(CRF). Study was done as normative data is lacking of VO2 max for Indian children which can serve as a reference range & will help in exercise prescription. Normal & healthy subjects of 7 to 19 years of both genders, from urban set up, understanding simple verbal commands were chosen by stratified random sampling from schools and junior colleges. 20 meter shuttle run test (20mSRT) was carried out on playground as per Leger’s protocol. VO2 max was assessed with by Barnett’s equation(b). 494 subjects showed Mean preadolescent VO2 max was 49.21±2.67ml/kg/min for boys and 44.25±2.28 ml/kg/min for girls girls age group. Mean adolescent VO2 max was 47.19±3.75 ml/kg/min for boys and 40.03±3.04 ml/kg/min for girls. Thus styudy concludes:Mean VO2 max was more in pre adolescents than in adolescents and in boys than girls.

Keywords : VO2 max , Children, 20mSRT