Abstract

Background: The energy expenditure is the amount of energy (or calories) that a person needs to carry out a physical function such as breathing, circulating blood, digesting food, or a physical movement. The method for estimating the energy cost using measurement of heart rate (HR) is the physiological cost index (PCI). Aims and
Objective: The aim of this study is to measure and correlate the relationship of energy expenditure of a normal healthy individual with different body mass index (BMI) and age.
Materials and Methods: A total of 115 participants (59 males and 56 females) were included in this study. Written consent form was obtained. Before exercise testing, each participant’s was measured that 2 BMI was the standard formula (kg/m ). Each participant was given rest for 5 min and recorded resting HR. Participants were asked to walk on 30 m straight floor track for 6-min walk test (6 MWT) at the normal speed. Pre-and post-walked vitals were taken, and PCI was calculated by formula.
Results: There is highly statistically significant relation with age and PCI (P < 0.05) as age (40.86 ± 15.56) increases, PCI (0.26 ± 0.11) value was increases. BMI (25.39 ± 4.56) increases, PCI value was increase and not much difference with BMI and distance covered by normal individual in 6 MWT, but adult age group was covered more distance than the older age group. Conclusion: The present study concluded that as the age and BMI increases the PCI increases, suggestive of more energy expenditure.