title: Accuracy of energy expenditure estimation by activity monitors differs with ethnicity.
abstract: The aim of this project is to explore the accuracy of 2 activity monitors (SenseWear Armband & Actical) to estimate energy expenditure during rest and light to moderate intensity exercises in 2 ethnic groups. 18 Caucasian and 20 Black adults (age: 26.8±5.2 years; body mass index: 23.9±3.0 kg/m(2)) wore the 2 devices simultaneously during 3 standardised activities: 30-min rest, 45-min of treadmill at 40% of their V˙O2peak and 45-min of stationary cycling at 50% of their V˙O2peak. Energy estimated with the 2 devices was compared to indirect calorimetry measurements. Both devices overestimated energy expenditure during rest (SenseWear: 36% in Black vs. 16% in Caucasian; Actical: 26% vs. 11%, p<0.01 between groups) and treadmill (SenseWear: 50% vs. 25%; Actical: 67% vs. 32%, p<0.01 between groups). Both devices significantly underestimated energy expenditure during stationary cycling (SenseWear: 24% vs. 26%; Actical: 58% vs. 70%, p=NS between groups). Equations used to estimate energy expenditure from accelerometer data is less precise among Black adults than Caucasian adults. Ethnic-specific formulas are probably required.
authors.affiliation: Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada.
authors.forename: A-S
authors.initials: AS
authors.lastname: Brazeau
authors.affiliation: Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada.
authors.forename: C
authors.initials: C
authors.lastname: Suppere
authors.affiliation: Nutrition, Universite de Montreal, Montreal, Canada.
authors.forename: I
authors.initials: I
authors.lastname: Strychar
authors.affiliation: Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada.
authors.forename: V
authors.initials: V
authors.lastname: Belisle
authors.affiliation: Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada.
authors.forename: S-P
authors.initials: SP
authors.lastname: Demers
authors.affiliation: Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Rabasa-Lhoret
mesh_terms: D056044:Actigraphy / Q000295:instrumentation*; D000293:Adolescent; D000328:Adult; D044383:Black People; D002153:Calorimetry, Indirect; D004734:Energy Metabolism; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D044465:White People; D055815:Young Adult