Television, internet and video games are common forms of technology that are used for entertainment and because they all involve a screen they are sometimes referred to as “screen media.” A lot of TV, internet and video games are designed to engage children and youth through fast paced images and increasingly violent content. The aim of the study is to assess the effect of Electronic Media on physical activity and physical health among school age children in selected schools at Nellore. A quantitative descriptive survey research design was adopted. A sample size of 30 school age children was selected using Non-probability convenience sampling technique. Structured questionnaire, modified standardized PDPAR tool, and structured checklist were used to assess the effect of Electronic Media on physical activity and physical health among school age children. The data was tabulated and analyzed using descriptive and inferential statistics. The study concludes that majority of school age children are sedentary to moderately active and are using electronic media at moderately high level. The effect of electronic media on physical health is moderate to severe.