Associations between accelerometer-measured physical activity and body fatness in school-aged children

Gába, Aleš; Mitáš, Josef; Jakubec, Lukáš

doi:10.1186/s12199-017-0629-4

Cited by 25 publications

(34 citation statements)

References 40 publications

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“…SB and PA were assessed for seven consecutive days using a hip-mounted ActiGraph GT3X accelerometer (ActiGraph, LLC., FL, USA). A detailed description of the measurement protocol is provided elsewhere [25]. Briefly, the time sampling interval was set at 60s, nonwear time was defined using the Troiano algorithm [26], and the Evenson cut-off points [27] were used to estimate the time spent in SB, light PA (LPA), and moderate-to-vigorous PA (MVPA).…”

Section: Sedentary Behaviors Assessmentmentioning

confidence: 99%

Sedentary behavior patterns and adiposity in children: a study based on compositional data analysis

et al. 2020

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Background: Between-person differences in sedentary patterns should be considered to understand the role of sedentary behavior (SB) in the development of childhood obesity. This study took a novel approach based on compositional data analysis to examine associations between SB patterns and adiposity and investigate differences in adiposity associated with time reallocation between time spent in sedentary bouts of different duration and physical activity. Methods: An analysis of cross-sectional data was performed in 425 children aged 7-12 years (58% girls). Waking behaviors were assessed using ActiGraph GT3X accelerometer for seven consecutive days. Multi-frequency bioimpedance measurement was used to determine adiposity. Compositional regression models with robust estimators were used to analyze associations between sedentary patterns and adiposity markers. To examine differences in adiposity associated with time reallocation, we used the compositional isotemporal substitution model. Results: Significantly higher fat mass percentage (FM%; β ilr1 = 0.18; 95% CI: 0.01, 0.34; p = 0.040) and visceral adipose tissue (VAT; β ilr1 = 0.37; 95% CI: 0.03, 0.71; p = 0.034) were associated with time spent in middle sedentary bouts in duration of 10-29 min (relative to remaining behaviors). No significant associations were found for short (< 10 min) and long sedentary bouts (≥30 min). Substituting the time spent in total SB with moderate-to-vigorous physical activity (MVPA) was associated with a decrease in VAT. Substituting 1 h/week of the time spent in middle sedentary bouts with MVPA was associated with 2.9% (95% CI: 1.2, 4.6), 3.4% (95% CI: 1.2, 5.5), and 6.1% (95% CI: 2.9, 9.2) lower FM%, fat mass index, and VAT, respectively. Moreover, substituting 2 h/week of time spent in middle sedentary bouts with short sedentary bouts was associated with 3.5% (95% CI: 0.02, 6.9) lower FM%. Conclusions: Our findings suggest that adiposity status could be improved by increasing MVPA at the expense of time spent in middle sedentary bouts. Some benefits to adiposity may also be expected from replacing middle sedentary bouts with short sedentary bouts, that is, by taking standing or activity breaks more often. These findings may help design more effective interventions to prevent and control childhood obesity.

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Section: Sedentary Behaviors Assessmentmentioning

confidence: 99%

Sedentary behavior patterns and adiposity in children: a study based on compositional data analysis

et al. 2020

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“…Lack of PA is related to several noncommunicable diseases (including heart diseases, diabetes, and cancer), as well as other health problems [5, 6]. Maintaining adequate levels of PA among adolescents could substantially improve physical and mental health (as measured by, for example, cardiorespiratory and muscular fitness, bone health, cardiovascular metabolic health biomarkers, body composition, and psychosocial outcomes) [7–11]. Although burdens associated with physical inactivity are widely recognized, more than 80% of adolescents worldwide are physically inactive based on the World Health Organization-defined threshold [12].…”

Section: Introductionmentioning

confidence: 99%

Perspectives of adolescents, parents, and teachers on barriers and facilitators of physical activity among school-age adolescents: a qualitative analysis

El-Ammari

Kazdouh

Bouftini

et al. 2019

Environ Health Prev Med

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Background Physical activity levels are low among adolescents in Morocco; however, the influences on physical activity behavior of adolescents have not yet been explored in a qualitative study. Here, we explored potential social-ecological barriers and facilitators of physical activity in Moroccan adolescents with the goal of developing a successful intervention program aimed at improving their physical activity level. Methods For this study, we conducted 17 focus group discussions (100 participants, composed of 56 adolescents, 26 parents, and 18 teachers from two middle schools in Taza city, Morocco). Discussions during focus groups were facilitated by a semi-structured interview guide. Guide questions were underpinned by the social-ecological model as a theoretical framework. Data analysis was carried out by two coders using thematic analysis. Results We found that barriers and facilitators of physical activity in adolescents are organized into six themes that belong to different levels of the social-ecological model. Three themes belonged to the intrapersonal level (perceived motivating and limiting factors, physical activity awareness, and time constraints), two themes were classified into the interpersonal/cultural level (social support and gender and cultural norms), and one theme belonged to the environmental level (access to opportunities). Most of the themes were at the individual level, with each theme including both barriers and facilitators. Conclusions Adolescent participation in physical activity can be facilitated or hampered by many factors. Results from the focus group discussions showed that these factors belonged to different levels of the social-ecological model, but most were at the individual level. Our findings have several implications. First, they may offer suggestions for a tailored intervention program aimed at improving adolescent physical activity. Second, they can improve quantitative research by enriching the battery of questions of physical activity instruments (e.g., a question related to physical disability). Third, the proposed thematic map can contribute to understanding interactions and causal pathways in the social-ecological model.

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“…It was assumed that if MPA and VPA increase, SB inherently decrease. However, MPA and VPA usually account for less than 5% of the day, whilst the time spent in LIPA is approximately three times greater [ 7 ]. LIPA may also be beneficial for children’s health [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Robust Compositional Analysis of Physical Activity and Sedentary Behaviour Data

Štefelová

Dygrýn

Hron

et al. 2018

IJERPH

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Although there is an increasing awareness of the suitability of using compositional data methodology in public health research, classical methods of statistical analysis have been primarily used so far. The present study aims to illustrate the potential of robust statistics to model movement behaviour using Czech adolescent data. We investigated: (1) the inter-relationship between various physical activity (PA) intensities, extended to model relationships by age; and (2) the associations between adolescents’ PA and sedentary behavior (SB) structure and obesity. These research questions were addressed using three different types of compositional regression analysis—compositional covariates, compositional response, and regression between compositional parts. Robust counterparts of classical regression methods were used to lessen the influence of possible outliers. We outlined the differences in both classical and robust methods of compositional data analysis. There was a pattern in Czech adolescents’ movement/non-movement behavior—extensive SB was related to higher amounts of light-intensity PA, and vigorous PA ratios formed the main source of potential aberrant observations; aging is associated with more SB and vigorous PA at the expense of light-intensity PA and moderate-intensity PA. The robust counterparts indicated that they might provide more stable estimates in the presence of outlying observations. The findings suggested that replacing time spent in SB with vigorous PA may be a powerful tool against adolescents’ obesity.

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Associations between accelerometer-measured physical activity and body fatness in school-aged children

Cited by 25 publications

References 40 publications

Sedentary behavior patterns and adiposity in children: a study based on compositional data analysis

Sedentary behavior patterns and adiposity in children: a study based on compositional data analysis

Perspectives of adolescents, parents, and teachers on barriers and facilitators of physical activity among school-age adolescents: a qualitative analysis

Robust Compositional Analysis of Physical Activity and Sedentary Behaviour Data

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