Childhood and adolescence are critical periods of development in every domain. Children during this stage undergo major physical, cognitive and psychological changes, which have significant impact on their health and wellbeing. Children during this stage make significant independent changes in their diet, physical activity, substance use, sexuality, etc., which have long lasting effect on their lifestyle and health condition. Lack of physical activity and healthy lifestyle can adversely affect their normal growth and development and hence is a major public health concern. The study results indicating a lesser active lifestyle and exercise patterns among girl school children of Uttar Pradesh, so it is recommended that provision for active involvement in physical activity and sports be provided for girl students in the school based programmes.