Background: Incremental levels of regular physical activity are inversely proportional to long-term cardiovascular mortality when controlled for the presence of other risk factors in both men and women. The present study was done to evaluate the effect of physical exercise on cardiac autonomic activity in healthy adult men along with their daily physical activity level. Materials & Methods: The present study was conducted in the department of physiology year 2015. It included 44 men of 18-30 years of age who were undergoing regular exercise programme. Another 44 aged and BMI matched men were selected from general population. Measurement of height (Metre) and weight (Kgs) was done in all subjects. BMI was calculated as weight divided by height2 (kg/m2). Blood pressure was also recorded. Physical activity level of all the subjects was assessed using Global Physical Activity Questionnaire. All subjects were subjected to ECG and findings were noted. HRV was also assessed. Global Physical Activity Questionnaire (GPAQ) was used in both groups. Results: Group I (Exercising group) comprised of 44 men and group II (Non exercising group) comprised of 44 men. The difference was non – significant (P – 1). Group I had mean heart rate of 72.38 beats/.min and group II had 74.21 beats/ min. The difference was non - significant (P > 0.05). The mean systolic blood pressure in group I was 114.26 mmHg and in group II was 110.42 mm Hg. The mean diasystolic blood pressure in group I was 74.56 mmHg and in group II was 75.8 mm Hg. The difference was non - significant (P > 0.05). Total power of HRV in both groups was compared which was not statistically significant (P> 0.05). There was no significant difference in LF and HF components of frequency domain parameters both in absolute and normalized units. LF/HF component did not show any significance statistically. Physical activity level was 4120±1235.23 in group I and 1206.4±1025.13 in group II. The difference was significant (P-0.01). Conclusion: We found that there was significant difference in the physical activity levels in both groups. However, three months of regular exercise did not have significant effect on cardiac autonomic activity including heart rate variability.
Key words: Exercise, Physical exercise, Systolic blood pressure