Abstract
Background and Objectives Obesity and a sedentary lifestyle factors related to pulmonary function and cardiorespiratory requirements (CRF). 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 In the present quasi-experiments (QEs) 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 Maximal oxygen uptake (VO2max) by modified treadmill bulk test. Results There were significant differences in Forced Vital Capacity (FVC), Forced Expiration Volume in one Second (FEV1), Peak Expiratory Flow (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/VC) 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 Body Mass Index (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.
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