COMPARATIVE STUDY OF HEART RATE VARIABILITY AT REST BETWEEN SEDENTARY AND NON-SEDENTARY MALES.

Dr Rizwana M. Pradhan; Dr Abhay D. Hatekar

Volume : VIII, Issue : IX, September - 2019

COMPARATIVE STUDY OF HEART RATE VARIABILITY AT REST BETWEEN SEDENTARY AND NON-SEDENTARY MALES.

Dr Rizwana M. Pradhan, Dr Abhay D. Hatekar

Abstract :

The present study was aimed to determine the effects of exercise training on heart rate and measures of heart rate variability associated with vagal cardiac modulation and to quantify the relationship between changes in these measures. 30 individuals who exercised at least 5 days/week for 45 min/day or more were compared with age matched sedentary controls. The resting HR was recorded in Lead II using Medicaid Students Physio Pac in supine position for 5 minutes. Due care was taken to remove factors which could interfere with results. There was a relative adycardia in the non–sedentary group at rest as compared to the sedentary group (p<0.001). Time domain indices of HRV, mean RRI, SDNN, and RMSSD were significantly enhanced in the non–sedentary group (p<0.001). Frequency domain indices of HRV, LFn.u., HFn.u., LF/HF ratio were higher in the non–sedentary group than sedentary group but the difference was not significant (p>0.05). These results suggest that the adaptive responses of the cardiovascular system to regular physical activity appear to include a reduction in sympathetic (SNS) activity and an increase in parasympathetic (PNS) activity during rest, which may contribute to the reduction in mortality associated with regular exercise