title: Relationships of self-reported physical activity domains with accelerometry recordings in French adults.
abstract: The objective was to examine the relationships of self-reported physical activity (PA) by domain (leisure, occupational, other) with PA and sedentary time as measured objectively by accelerometry. Subjects were adults with low habitual PA levels from a community in northern France. Among subjects in the lowest tertile of a PA score from a screening questionnaire, 160 (37% males, age: 41.0 +/- 10.8 years, BMI: 25.1 +/- 4.1 kg/m(2), mean +/- SD) completed a detailed instrument (Modifiable Activity Questionnaire), and wore an accelerometer (Actigraph) for seven consecutive days. Relationships between questionnaire domains (occupational, leisure, and "non-occupational non-leisure") and accelerometry measures (total activity and sedentary time) were assessed using Spearman correlation coefficients. In this population, the highest contributor to total reported PA (h/week) was occupational PA. Time spent in non-occupational non-leisure PA ranked second in women and third in men. The most frequent non-occupational non-leisure PA were shopping and household chores. In women, non-occupational non-leisure PA contributed more than occupational or leisure-time PA to total PA energy expenditure (median: 18.0, 9.1, and 4.9 MET-h/week, respectively). Total PA by accelerometry (count/day) was correlated to leisure-time PA in women (r = 0.22, P < 0.05) and to occupational (r = 0.43, P < 0.01) and total reported PA (r = 0.39, P < 0.01) in men (all in MET-h/week). There was an inverse relationship between accelerometry sedentary time (h/day) and non-occupational non-leisure PA (MET-h/week, r = -0.30, P < 0.001). These findings indicate the importance of assessing non-occupational non-leisure PA for a better understanding of how individuals partition their time between active or sedentary occupations.
authors.affiliation: Department of Nutrition, Pitié-Salpétrière Hospital (AP-HP); Human Nutrition Research Center Ile-de-France (CRNH-IdF), University Pierre et Marie Curie-Paris, 75013 Paris, France.
authors.forename: David
authors.initials: D
authors.lastname: Jacobi
authors.forename: Marie-Aline
authors.initials: MA
authors.lastname: Charles
authors.forename: Muriel
authors.initials: M
authors.lastname: Tafflet
authors.forename: Agnès
authors.initials: A
authors.lastname: Lommez
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Borys
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Oppert
mesh_terms: D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D000368:Aged; D001519:Behavior; D004734:Energy Metabolism; D015444:Exercise / Q000502:physiology*; D005260:Female; D005602:France; D006801:Humans; D007899:Leisure Activities; D008019:Life Style; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation; D009043:Motor Activity; D005082:Physical Exertion; D012650:Self Disclosure; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055815:Young Adult