The role of body composition in lung function and the effect of exercise training on lung function in adolescent girls with different body mass index

Background and Aim: Background: Obesity and a sedentary lifestyle factors related to pulmonary function and cardio-respiratory requirements. The aim of this study was to determine the effect of regular aerobic training on cardiac and respiratory function in adolescent girls with different body mass index. Methods: Methods: In the present quasi-experimental study, which was conducted with pre-test and post-test design, 45 female students in the age range of 13 to 18 years old were selected and added to 3 groups of 15 people with normal, overweight and obese body mass index. The training protocol included 10 weeks of aerobic training, 3 sessions per week and each exercise session for 20-45 minutes of. Pulmonary function was measured by spirogram and VO2max by modified treadmill bulk test. Results: There were significant differences in FVC, FEV1, PEF, FEV1 / FVC and VO2max in groups with normal body mass index, overweight and obese (P <0.001). After the training period, a significant improvement was observed in spirometry indices (FVC, FEV1, PEF FEV1 / FVC) and VO2max compared to the pre-test (P <0.001), but still significantly lower than the post-test values in the was normal group. Also significant decreased was observed in BMI in obese and overweight groups (P <0.001). Conclusion: The results of the present study showed that obesity is one of the effective factors in reducing pulmonary function and aerobic exercise improves pulmonary function and cardiorespiratory endurance in adolescent girls with different body mass index.