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Int J Sports Med 2014; 35(10): 847-850
DOI: 10.1055/s-0034-1371837
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Accuracy of Energy Expenditure Estimation by Activity Monitors Differs with Ethnicity

A.-S. Brazeau
1   Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada
,
C. Suppere
1   Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada
,
I. Strychar
2   Nutrition, Universite de Montreal, Montreal, Canada
,
V. Belisle
1   Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada
,
S.-P. Demers
1   Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada
,
R. Rabasa-Lhoret
1   Plateforme PROMD, Institut de recherches cliniques de Montreal, Montreal, Canada
› Author Affiliations
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Publication History



accepted after revision 26 January 2014

Publication Date:
09 May 2014 (online)

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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/m2) 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.

Key words

physical activity energy expenditure - resting energy expenditure - activity monitoring - accelerometry
 

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