Children who are in good health mature into adults who are robust in body and mind. one's greatest asset and source of pride of every country are its healthy children. However, millions of youngsters suffer from both acute and chronic illnesses, which has an influence on their quality of life and range of possibilities, including educational chances.Methods:A study was adopted by quantitative evaluative approach. A sample size was 60 school age children with LRTI, at Sri MuthuKumaran Medical College Hospital &Research Institute, Chennai. Sampling technique was adopted by this study was Non probability Purposive sampling technique. The tools consist of demographic variables, clinical variables, and respiratory parameters on lower respiratory tract infection. Results:The study found that the effectiveness of balloon blowing exercise on respiratory parameters among school age children with LRTI.t=13.68 which shows significant at the level of p<0.001 Conclusion:The study revealed that the effectiveness of balloon blowing exercise on respiratory parameters among school age children with LRTI between study and control group showed that, There is a statistically significant difference found at p<0.001 level of significance.