European Journal of Biomedical and Pharmaceutical Sciences

BLOOD PRESSURE RESPONSES TO EXERCISE IN NORMOTENSIVE ADULT MALES WITH FAMILY HISTORY OF HYPERTENSION

Shabir-ud-din Lone, Sheikh Imran Syed, Hilal Ahmad Wani* and Qazi Danish

ABSTRACT

It has been seen in various studies that normotensives with a high normal resting blood pressure response to exercise tests are prone to develop hypertension. There is an association between arrhythmias and actual of either increased sympathetic or decreased parasympathetic activity. Heart rate variability (HRV) is one such quantitative makers of function for ANS. The aim of this study was to know the changes in blood pressure and to know any changes in autonomic activity during rest and post exercise periods in adult normotensives with positive family history of hypertension. A total of 50 normotensive males with BMI of 18.6 – 24.9 kg/m2, were divided into two groups with and without family history of primary hypertension, underwent a cycle ergometry exercise test. The exercise test was divided as basal (i.e.) before exercise, during exercise and after exercise i.e. recovery period. ECG and heart rate were recorded at baseline, during exercise and during recovery period of 15 minutes and blood pressure was recorded before exercise and during recovery. Frequency domain analysis of HRV was performed. The basal systolic blood pressure at 1 minute and 3 minute of recovery after exercise test were significantly higher in the study group. The basal LF were significantly higher in the study group then the control group. A significant difference in basal systolic blood pressure, and a higher LF spectrum in young adults of hypertensive parents, may be early marker of cardio-vascular changes in subjects with a family history of essential hypertension.

Keywords: Heart rate variability, normotensives, blood pressure, cycle ergometer.