Energy Expenditure Lab Report

LAB REPORT 1

MEASURING ENERGY EXPENDITURE USING CYCLE ERGOMETER

10/13/2015

SHEETAL PARMAR
TY2

INTRODUCTION

Physical activity is defined as movement of body, which is produced by the skeletal muscles of the body which results in energy expenditure. There are several numbers of techniques for the assessment of physical activity related energy expend, the most valid technique to estimate this value at the definition of the physical activity is indirect calorimetry (Westerterp, 2013). Oxygen consumed during postexercise recovery period and during exercise above resting level contribute to calorie expenditure. The physiology of upperbody exercise and lower body exercise has been thoroughly researched and reviewed in so many research
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Thus , the oxygen requirement to the respiratory muscles increases which results in decrease in use of oxygen by locomotor muscles. Resulting to this lack of oxygen, respiratoy muscles become fatigue. Morever, post exercise oxygen consumption and energy expenditure is more after high intensity exercise (Doucet, Imbeault, Alméras & Tremblay, 1999)
The purpose of conducting a lab is to measure the metabolic and energy expenditure with cycle ergometry. For any activities taking longer time than few minutes, main source of energy is through aerobic metabolism, as we do not store more amount of o2 in body, we must deliver o2 to tissue when it is needed during prolonged exercise. Therefore, we have to measure the volume of oxygen uptake (Vo2) and volume of carbon dioxide (Vco2) which produced by metabolism of sources of energy through indirect
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The major findings of this study were Vo2, VCo2, RER. The implications of these findings are that, the energy expenditure is affected by age and weight of the subjects. It was also observed that in resting condition in 3 minutes without any workload more carbohydrates are used than fats, but as the workload increased more fat was consumed. But in general, the efficiency of cycle ergometry is same for everyone, two subjects should have same Vo2max by assuming that their capacity to work is similar. Maximal VO2 declines with age due to various factors like decrease in lean body mass and reduction in maximal exercise capacity. Measurement of RER immediately after exercise may not be accurate representation of utilization of fuels, but the measurement of Vo2 and VCo2 should be calculated within several minutes. Trained subjects have a higher oxidative capacity which might be greater fat utilizations and lower RER after exercises but in our study at the end of result with heavy load more carbohydrates were used than fat that might be because of our subjects were

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