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Aim: Decrease in physical activity has led to rise in obesity contributing to the upward trend of cardiovascular disease. This study aims to find how the alteration in body mass index (BMI) results in heart rate (HR) and percentage of maximum predicted heart rate (% max pHR) variability and how it differs in young and middle old subjects before and after thestress test. Also it aims to find the same difference between type 2 diabetics (type 2 DM) and non-diabetic (non DM); secondary hypertensive (HTN) and non-hypertensive (non HTN)individuals. Method: 120 individuals in the age range 14 to 75 years of age were taken for this study. We grouped these individuals into young and middle-old which was further subdivided into underweight, normal, overweight, obese based on BMI.Also the middle-old age group was by itself divided into hypertensive and non-hypertensive, type 2 diabetic and non-diabetic .The individuals were asked to undergo the stress test on a treadmill. The test was terminated on achieving the max predicted heart rate or on complaints of fatigue, leg discomfort or chest pain. Heart rate, and percentage of maximum predicted heart rate was recorded at rest and at the end of exercise. Outcome: it was found that on doing stress test HR was increased in all groups. But the increase was significantly more in young individuals especially in underweight and normal BMI groups.

Variance in Heart Rate And Maximum Predicted Heart Rate on Stress Test with Changing Body Mass index in Young And Middle Old Age Individuals