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 participants was measured that BMI was the standard formula (kg/m2). 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.
Key words: Age; Body Mass Index; Physiological Cost Index; Healthy Individuals
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