TY - JOUR AU - Rana, Binaya SJB AU - Pun, Matiram PY - 2015/09/30 Y2 - 2024/03/28 TI - Estimation of Physiological Cost Index as an Energy Expenditure Index using MacGregor’s Equation JF - Journal of Nepal Medical Association JA - J Nepal Med Assoc VL - 53 IS - 199 SE - Original Article DO - 10.31729/jnma.2786 UR - https://www.jnma.com.np/jnma/index.php/jnma/article/view/2786 SP - 174-179 AB - <p><strong>Introduction</strong>: Physical activity and energy expenditure can be quantified by measuring heart rate,&nbsp;oxygen uptake and respiratory quotient. The Physiological Cost Index (PCI) proposed by MacGregor&nbsp;is a simple and straightforward method to estimate the energy expenditure index. Here, we aim to&nbsp;estimate the energy expenditure among young Asian population using MacGregor’s equation.&nbsp;</p><p><strong>Methods</strong>: A total of 50 young randomly selected healthy females performed 50m, 100m and 150m&nbsp;walking test at their self-selected preferred speed. The physiological cost index values for 100 m&nbsp;walk at speeds slower and faster than the preferred speed were also obtained. The physiological cost&nbsp;index during exercise was calculated using MacGregor’s equation considering heart rate and speed&nbsp;of walking over the varying distances.&nbsp;</p><p><strong>Results</strong>: The PCI values on three different distances are consistent during self selected preferred&nbsp;speed. The PCI estimation on second and third tests for all three distances walked consistently&nbsp;reproducible. However for each distance walked, the first test the PCI was significantly higher than&nbsp;the second and third test values. The PCI values increased significantly when subjects walked either&nbsp;slower (p = 0.02) or faster (p = 0.001) than their normal preferred speed.&nbsp;</p><p><strong>Conclusion</strong>: The physiological cost index values were similar for varying distances walks. The PCI&nbsp;was the least at the preferred speed of walking and increased when the subjects either walked slower&nbsp;or faster than the preferred speed. The first estimation was higher than subsequent estimations.&nbsp;</p><p><strong>Keywords:</strong> <em>energy expenditure index; exercise; physiological cost index. </em>| <strong><a title="Click Here for PubMed" href="https://www.ncbi.nlm.nih.gov/pubmed/?term=27549500">PubMed</a></strong><br><br></p> ER -