Validation and Calibration of Physical Activity Monitors in Children

Puyau, Maurice R.; Adolph, Anne L.; Vohra, Firoz A.; Butte, Nancy F.

doi:10.1038/oby.2002.24

Cited by 854 publications

(932 citation statements)

References 14 publications

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“…The Actigraph accelerometers have been validated previously in children and have acceptable correlations with energy expenditure and strong intra- and inter-instrument reliability. (30, 34, 51) Children were instructed to wear the monitor for seven consecutive days during most waking hours, except while engaging in water-based activities (e.g. showering, swimming).…”

Section: Methodsmentioning

confidence: 99%

Perceptions of the Neighborhood Environment and Children’s Afterschool Moderate-to-Vigorous Physical Activity

McDonald

Dowda

Colabianchi

et al. 2015

Pediatric Exercise Science

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Previous research suggests the neighborhood environment may be an important influence on children’s physical activity (PA) behaviors; however, findings are inconsistent. The purpose of this study was to further understand the relationship between perceptions of the neighborhood environment and children’s afterschool moderate-to-vigorous PA (MVPA). Utilizing a structural equation modeling technique, we tested a conceptual model linking parent and child perceptions of the neighborhood environment, parent support for PA, and child outdoor PA with children’s afterschool MVPA. We found that child perception of the neighborhood environment and outdoor PA were positively associated with afterschool MVPA. In addition, parent support for PA positively influenced children’s outdoor PA. The neighborhood environment and outdoor activity appear to play an influential role on children’s afterschool PA behaviors.

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Section: Methodsmentioning

confidence: 99%

Perceptions of the Neighborhood Environment and Children’s Afterschool Moderate-to-Vigorous Physical Activity

McDonald

Dowda

Colabianchi

et al. 2015

Pediatric Exercise Science

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“…The lower cutoff for moderate activity, that is 2000 counts per minute, is equivalent to walking at 3 km h À1 . 30 The time engaged at vigorous PA (46 metabolic equivalents) was calculated based upon a cutoff of X4000 counts per minute. Also, the time spent in at least a moderate intensity level (43 metabolic equivalents) was calculated as the sum of time spent in moderate or vigorous PA (MVPA).…”

Section: Pubertal Statusmentioning

confidence: 99%

Association of objectively assessed physical activity with total and central body fat in Spanish adolescents; The HELENA Study

et al. 2009

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Objectives: To examine the association of objectively assessed physical activity (PA) with markers of total and central body fat in adolescents, and to determine whether meeting the current PA recommendations (X60 min day À1 of at least moderate intensity PA) is associated with reduced levels of total and central body fat. Subjects/Methods: A total of 365 Spanish adolescents aged 12.5-17.5 years participated in this cross-sectional study. PA was assessed by accelerometry and expressed as average PA (counts per minute), and min day À1 of light, moderate, moderate to vigorous (MVPA) and vigorous PA. MVPA was dichotomized into o60 min day À1 and X60. Total body fat was measured by DXA, BodPod and the sum of six skinfolds. Central body fat was measured by DXA at three regions (R1, R2 and R3), and waist circumference. Results: All markers of central body fat were negatively associated with vigorous PA (Po0.01) after controlling for sex, age and pubertal status. Abdominal adiposity measured at R1, R2 and R3 was also negatively associated with MVPA (Pp0.001), and with average PA (Po0.01). All markers of total body fat were negatively associated with vigorous PA (Po0.01), MVPA (Po0.01) and average PA (Po0.05). Adolescents engaged on at least 60 min day À1 MVPA presented lower levels of total (Po0.05) and central body fat (Pp0.01). Conclusions:The results suggest that vigorous PA may have a greater effect on preventing obesity in adolescents than does PA of lower intensity, whereas both average PA and at least moderate PA may have an impact on total and central body fat in youth.

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“…Accelerometer readings were processed using methods similar to those of Puyau et al (2002). Readings at or above 1500 counts/30 s were treated as MVPA .…”

Section: Measurement Of Physical Activitymentioning

confidence: 99%

Commercial venues as supports for physical activity in adolescent girls

Dowda

McKenzie

Cohen

et al. 2007

Preventive Medicine

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Objective-The purposes of this study were to describe the types and availability of commercial facilities for physical activity (PA) in six diverse geographic areas (Washington DC and Maryland; South Carolina; Minnesota; Louisiana; Arizona; and California) and to assess the relationship between those facilities and the non-school PA of adolescent girls.Methods-A total of 1556 6th grade girls participating in the Trial of Activity for Adolescent Girls (TAAG) wore accelerometers for 7 days providing 6 days of complete data, completed questionnaires in 2003 and had their residential addresses geocoded. Nearby commercial facilities available to provide PA (i.e. dance studios, youth organizations) within a 1-mile radius of participants' residences were identified and geocoded. The association between the presence of any commercial PA facility and girls' PA was determined using a multi-level design and controlling for demographic characteristics and other potential confounders. Analyses were conducted in 2005-2006. Results-Sixty-eight percent of the girls had at least one commercial PA facility near their homes. Availability and types of commercial PA facilities differed by where participants lived. Girls who lived near one or more commercial PA facilities had higher non-school MET-weighted moderateto-vigorous PA than girls who had none near their homes.Conclusions-The findings suggest that commercial PA facilities are important contributors to the accumulation of PA among adolescent girls.

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Validation and Calibration of Physical Activity Monitors in Children

Cited by 854 publications

References 14 publications

Perceptions of the Neighborhood Environment and Children’s Afterschool Moderate-to-Vigorous Physical Activity

Perceptions of the Neighborhood Environment and Children’s Afterschool Moderate-to-Vigorous Physical Activity

Association of objectively assessed physical activity with total and central body fat in Spanish adolescents; The HELENA Study

Commercial venues as supports for physical activity in adolescent girls

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