title: Estimation of energy expenditure in a work environment: comparison of accelerometry and oxygen consumption/heart rate regression.
abstract: The aim of this study was to compare estimation of energy expenditure (EE) in working environments, either from accelerometry or from an individual oxygen consumption/heart rate (VO(2)/HR) regression curve. The study participants were 46 volunteer workers aged 27+/-6 years old. A significant correlation between EE predicted by the VO(2)/HR curve and the accelerometer was observed (r=0.78, p <0.01). However, more disparities were observed between the two methods when the mean job intensity was not within 16% and 23% higher than resting HR. The accelerometer overestimated by a mean of 34.4% the prediction by VO(2)/HR regression if the intensity of the task was lower than a total of 1000 kcal/shift and underestimated the prediction by a mean of -24.9% if EE estimation of the work shift was higher than a total of 1500 kcal/shift. Despite a high correlation between both methods in the whole group, EE evaluated by accelerometry does not correspond to EE predicted by the VO(2)/HR regression curves when evaluated individually.
authors.affiliation: Département des sciences de l'activité physique, Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada.
authors.forename: D R
authors.initials: DR
authors.lastname: Bouchard
authors.forename: F
authors.initials: F
authors.lastname: Trudeau
mesh_terms: D000054:Acceleration; D000293:Adolescent; D000328:Adult; D004734:Energy Metabolism; D005260:Female; D006306:Health Surveys; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D016272:Occupational Health; D010101:Oxygen Consumption / Q000502:physiology*; D012044:Regression Analysis; D011795:Surveys and Questionnaires; D014937:Work; D017132:Workplace