Acta Biomedica Scientia

TO ASSESS BY FREQUENCY DOMAINS OF HRV AND VARIABLES OF LUNG FUNCTION IN APPERANTLY INDIAN HEALTHY YOUNG MALES.

Hari Prasad Malla1, P.Kirankumar Reddy

drvrvkk@gmail.com

Keywords

Physical activity is known to improve physical fitness and to reduce mortality and morbidity from numerous clinical conditions. Regular exercise decreases sympathetic activity , reactivity and increase in vagal tone . The amount of HRV represents the physiologic and psychological health. There is positive relation seen between physical activity and variables of lung function .Goal of present study is to establish the role of regular exercise to improve HRV and lung function .The major purpose of this analytic type of observational study is to explore the role of physical activity on cardiorespiratory fitness in healthy people. Methods: 90 subjects of age group 18-25 years divided into three groups. Each group is having 30 subjects. Subjects were divided into three groups according to leisure time physical activity assessed by metabolic equivalent minutes/week. Variables of lung function recorded were FEV1, FEV1/FVC, PEFR, F EF25-75, and MVV. After 15 min of rest in supine posture continous ECG for 5 min recorded and heart rate variability was calculated. Hence regular physical activity is associated with increased HRV ,improved lung function ,reduced sympathetic activity and increased parasympathetic tone. Results The results of present study were analysed, each group was compared by using ANOVA. p value <0.05 were considered significant .FVC, FEV1, FEV1/FVC increased significantly with increase in physical activity (p<0.05) whereas FEF 25-75% and MVV showed highly significantly increase (p<0.001). Results of HRV showed that LF ab power LFnu and LF/HF ratio decrease significantly with increase in physical activity whereas HFab power, HFnu and Tpower increase significantly with increase in physical activity. Interpretation & conclusion: Present study strongly suggests that the intensity or severity of the sports determines the extent of strengthening of the respiratory muscles with a resultant increase in the lung volumes. Present study showed that regular physical activity is associated with increased HRV, reduced sympathetic activity and increased parasympathetic tone and improved cardiorespiratory health. Moderate amount of exercise(1500MET minutes per week-3000 MET minutes per week) is sufficient to increase HRV