Physical Activity‐Related Energy Expenditure With the RT3 and TriTrac Accelerometers in Overweight Adults

Jacobi, David; Perrin, A; Grosman, Natacha; Doré, Marie-France; Normand, Sylvie; Oppert, Jean‐Michel; Simon, Chantal

doi:10.1038/oby.2007.605

Cited by 47 publications

(62 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The main findings of this multicentre study were that the output from all monitors demonstrated a significant relationship with AEE derived from DLW measurements in line with those typically observed in field validation studies [13,[24][25][26][27][28]. The DynaPort MoveMonitor and the Actigraph GT3X best explained the activity related energy from TEE not related to TBW.…”

Section: Discussionsupporting

confidence: 61%

Validity of physical activity monitors during daily life in patients with COPD

et al. 2013

View full text Add to dashboard Cite

Symptoms during physical activity and physical inactivity are hallmarks of chronic obstructive pulmonary disease (COPD). Our aim was to evaluate the validity and usability of six activity monitors in patients with COPD against the doubly labelled water (DLW) indirect calorimetry method. 80 COPD patients (mean¡SD age 68¡6 years and forced expiratory volume in 1 s 57¡19% predicted) recruited in four centres each wore simultaneously three or four out of six commercially available monitors validated in chronic conditions for 14 consecutive days. A priori validity criteria were defined. These included the ability to explain total energy expenditure (TEE) variance through multiple regression analysis, using TEE as the dependent variable with total body water (TBW) plus several physical activity monitor outputs as independent variables; and correlation with activity energy expenditure (AEE) measured by DLW.The Actigraph GT3X (Actigraph LLC, Pensacola, FL, USA), and DynaPort MoveMonitor (McRoberts BV, The Hague, the Netherlands) best explained the majority of the TEE variance not explained by TBW (53% and 70%, respectively) and showed the most significant correlations with AEE (r50.71, p,0.001 and r50.70, p,0.0001, respectively).The results of this study should guide users in choosing valid activity monitors for research or for clinical use in patients with chronic diseases such as COPD. @ERSpublications This study validates six activity monitors in the field against indirect calorimetry (DLW) in patients with COPD

show abstract

Section: Discussionsupporting

confidence: 61%

Validity of physical activity monitors during daily life in patients with COPD

et al. 2013

View full text Add to dashboard Cite

show abstract

“…However, their output is highly variable and difficult to put into clinical context. Interpretation depends on calibration equations and cutoff points for defining light, moderate, vigorous, and total activity [10][11][12][13][14][15]. To date, these cutoff points have been defined for nondisabled, young adults in the supervised setting with correlations to maximum oxygen consumption on cardiopulmonary exercise tests, not during free-living conditions in the population being studied.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of uniaxial accelerometer in chronic obstructive pulmonary disease

Moy¹

2008

JRRD

View full text Add to dashboard Cite

Abstract-Wearable sensors have been developed and used in nondisabled adults. Little is known about their accuracy in patients with chronic disease. We tested the ActiHealth accelerometer, which measures step counts, in subjects with chronic obstructive pulmonary disease (COPD). We determined the intra-and interdevice coefficients of variation (CVs). We assessed the accuracy of the device in 15 nondisabled males and 46 subjects with COPD. Accuracy was defined as percent step capture, (device step count divided by manual step count) times 100. Predictors of percent step capture were identified using linear regression methods. The accelerometer has an intradevice CV ranging from 0.008 to 0.025 and an interdevice CV of 0.64. In nondisabled males, median percent step capture was 96% (interquartile range 81%-98%). In subjects with COPD, median percent step capture was 86% (interquartile range 72%-96%). Usual walking speed was the most important predictor of percent step capture (p = 0.004). The ActiHealth accelerometer has acceptable intra-and interdevice CVs. It is highly accurate in nondisabled subjects. The accuracy declines in subjects with COPD based on walking speed. Prior to using the ActiHealth accelerometer, researchers and clinicians should assess walking speed and percent step capture in each subject.

show abstract

“…The RT3 triaxial accelerometer (StayHealthy, Inc; Monrovia, California) is a waist-mounted device used to measure free-living activity within a range of populations [11][12][13]. Validation and reliability of the RT3 accelerometer for free-living research has been assessed under a number of laboratory-based conditions, including walking and running at standardized speeds on a treadmill [11,[14][15][16][17], using a shaker table [18][19], assessing various mobility tasks [3], and performing structured activities [20].…”

Section: Introductionmentioning

confidence: 99%

Construct validity of RT3 accelerometer: A comparison of level-ground and treadmill walking at self-selected speeds

Hendrick¹,

Boyd²,

Low³

et al. 2010

JRRD

View full text Add to dashboard Cite

Abstract-This study examined differences in accelerometer output when subjects walked on level ground and on a treadmill. We asked 25 nondisabled participants to wear an RT3 triaxial accelerometer (StayHealthy, Inc; Monrovia, California) and walk at their "normal" and "brisk" walking speeds for 10 minutes. These activities were repeated on a treadmill using the individual speeds from level-ground walking on two occasions 1 week apart. Paired t-tests found a difference in RT3 accelerometer vector magnitude (VM) counts/min between the two walking speeds on both surfaces on days 1 and 2 (p < 0.001). Although we found no significant differences between VM counts/min on the two surfaces at normal and brisk speeds on days 1 and 2 (p > 0.05), we found wide limits of agreement between level ground and treadmill walking at both speeds. Measurement and discrimination of walking intensity employing RT3 accelerometer VM counts/min on the treadmill demonstrated reasonable validity and stability over two time points compared with level-ground walking.

show abstract

Physical Activity‐Related Energy Expenditure With the RT3 and TriTrac Accelerometers in Overweight Adults

Cited by 47 publications

References 47 publications

Validity of physical activity monitors during daily life in patients with COPD

Validity of physical activity monitors during daily life in patients with COPD

Accuracy of uniaxial accelerometer in chronic obstructive pulmonary disease

Construct validity of RT3 accelerometer: A comparison of level-ground and treadmill walking at self-selected speeds

Contact Info

Product

Resources

About