Objectively Measured Physical Activity in Sixth-Grade Girls

Pate, Russell R.; Stevens, June; Pratt, Charlotte; Sallis, James F.; Schmitz, Kathryn H.; Webber, Larry S.; Welk, Gregory J.; Young, Deborah Rohm

doi:10.1001/archpedi.160.12.1262

Cited by 79 publications

(93 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Those in the lowest quartile of 25(OH)D concentrations had lower dietary fiber intake and a trend toward less milk and calcium intake. There was a higher proportion, though a nonsignificant trend, of youth meeting guidelines for steps/day (Vincent et al, 2003) and moderate-to-vigorous physical activity (Pate et al, 2006) in the three highest season-specific quartiles of 25(OH)D.…”

Section: Resultsmentioning

confidence: 82%

“…Levels of vitamin D in fortified milk would have to be considerably Recommendations are 11 000 steps/day for girls and 12 000 steps/day for boys (Vincent, et al, 2003). b Moderate-to-vigorous physical activity guidelines are greater than 60 min/day for youth of both sexes (Pate et al, 2006). Youth in the lowest season-specific quartile of vitamin D levels had similar diets as youth in the upper quartiles with the exception of dietary fiber.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Higher vitamin D intake is needed to achieve serum 25(OH)D levels greater than 50 nmol/l in Québec youth at high risk of obesity

et al. 2011

View full text Add to dashboard Cite

Background/Objectives: Vitamin D levels are often observed to be low in Canadian youth, despite the mandatory fortification of fluid milk. We identified modifiable correlates of plasma vitamin D concentrations to inform public health efforts to remediate low-vitamin D status. Subjects/Methods: We recruited 159 children aged 8-11 years, who were at at high risk of obesity, non-systematically during different seasons. Vitamin D status was assessed by measuring plasma 25-hydroxyvitamin D (25(OH)D) using a radioimmunoassay. Dietary intake, including vitamin supplements, was measured using three dietitian-administered 24 h diet recalls. Fat mass was measured by dual energy X-ray absorptiometry. Accelerometers were worn for 7 days to estimate physical activity. Independent correlates of plasma 25(OH)D concentrations were identified using multiple regression in an analysis controlling for season of measurement.Results: Approximately, 7% of youth had hypovitaminosis D (25(OH)D p37.5 nmol/l) during winter and spring when vitamin D levels are at their nadir. Only 55% of participants had vitamin D levels, which the Institute of Medicine considers optimal (25(OH)D 450 nmol/l). The mean dietary vitamin D intake, 6.6 mcg, was well below current recommendations set at 15 mcg. A serving increase in milk consumption and a s.d. increase in physical activity were associated with only a 2.9 and 2.1 nmol/l increase in plasma 25(OH)D, respectively. There was no association between 25(OH)D and adiposity. Conclusions: Our results indicate the challenges of obtaining adequate vitamin D intake from the current food supply to support a level of 25(OD)D 450 nmol/l.

show abstract

Section: Resultsmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Higher vitamin D intake is needed to achieve serum 25(OH)D levels greater than 50 nmol/l in Québec youth at high risk of obesity

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Using a similar definition as adopted in the Norwegian youth, Owen et al (46) suggested that 76% and 53% of 9-10 year old boys and girls, from a multi-ethnic district in England, met the recommended levels of physical activity. Whereas Pate et al (43) suggested that no more than 11.8% of 12 year old girls from the US were active according to the recommendations for public health. It appears that boys are more physical active than girls (39,40,42,(44)(45)(46)(47), and that activity level declines with age (39)(40)(41)(42)47), also confirmed in longitudinal analysis (39,41).…”

Section: Introductionmentioning

confidence: 99%

“…Longitudinal analysis showed that activity level declined from 9 to 15 years (39). Due to various definitions of MVPA when assessed objectively, the prevalence of sufficiently active children and youth (6 to 15 years) varies from 99.6% to 0.4% in comparable studies (40)(41)(42)(43)(44)(45)(46). Using a similar definition as adopted in the Norwegian youth, Owen et al (46) suggested that 76% and 53% of 9-10 year old boys and girls, from a multi-ethnic district in England, met the recommended levels of physical activity.…”

Section: Introductionmentioning

confidence: 99%

Early life determinants of physical activity and sedentary time: Current knowledge and future research

Øglund¹,

Stensrud²,

Ekelund³

2014

Nor J Epidemiol

View full text Add to dashboard Cite

Previous findings of the association between low birth weight and subsequent health outcomes have led to the "developmental origins of health and disease hypothesis". Furthermore, modifiable and partly modifiable early life factors may also influence behaviors such as physical activity and sedentary behavior. The aim of the present review was to summarize the existing knowledge on early life determinants (birth weight, rapid infant weight gain, motor development and infant temperament) of childhood physical activity and sedentary time, and suggest opportunities for future research based on the Mother and Child Cohort Study (MoBa). Inconsistent results have been observed when relating birth weight to later physical activity, likely explained by differences in methodology when assessing physical activity between studies. There is limited data on whether rapid weight gain in early life predicts later physical activity and few studies have examined the association between birth weight and infant weight gain with subsequent sedentary time. Motor development may be a predictor for childhood physical activity, however methodological limitations preclude firm conclusions. The association between motor development and sedentary time has rarely been examined. Conflicting results have been reported for the association between infant temperament and subsequent physical activity and sedentary time in toddlers. Finally, it is unknown whether physical activity modifies the association between birth weight, postnatal weight gain, and later health outcomes in youth. Additional research in well-characterized birth cohorts can be used to generate new knowledge on possible early life determinants of children's and youth's physical activity and sedentary time which may inform evidence-based public health interventions.This is an open access article distributed under the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

show abstract

“…The current study differs from other studies by the time period and context during which ST was examined. While others focused on comparing ST in childhood to adolescence, 5,[25][26][27] or adolescence to adulthood, 5 this study examined potential longitudinal changes in ST from younger to older adolescence (i.e., ages 14/15 to 18/19) in the context of a province-wide PE policy. Adolescence is a critical developmental stage in the life course for physical and cognitive growth, as well as a transitional period characterized by a growing role in adopting lifestyle practices that may track into adulthood and remain stable throughout life.…”

Section: Discussionmentioning

confidence: 99%

Trajectories of objectively measured sedentary time among secondary students in Manitoba, Canada in the context of a province-wide physical education policy: A longitudinal analysis

Zuo

Comte

et al. 2016

Can J Public Health

View full text Add to dashboard Cite

OBJECTIVES: Canadian adolescents' sedentary behaviour (SB) is poorly understood and greatly understudied compared to physical activity (PA). Accumulating evidence suggests that SB poses long-term health risks regardless of PA levels. To design effective interventions that target SB, it is critical to first understand adolescents' sedentary time (ST) trajectories in a Canadian context. Therefore, we examined longitudinal trajectories of Manitoba students' ST from 2008 to 2011 and identified associated factors in the context of a province-wide physical education (PE) policy.METHODS: Secondary schools offering grades 9 through 12 were randomly selected in blocks to represent the urban and rural geography of Manitoba. In each selected school (n = 31), a convenience sample of grade 9 or 10 PE classes was recruited, leading to a final sample of 447 students. To assess ST, participants wore accelerometers on 7 consecutive days at baseline (2008) and during at least one follow-up period (2009, 2010 and 2011).RESULTS: At baseline, students accumulated an average of 540 minutes/day of ST. Over the course of secondary school, students' ST trajectories remained stable. Females compared to males had a slightly higher rate of decline in ST (p = 0.035), adjusting for socio-demographic variables. ST trajectories were not associated with baseline PA, body mass index and school neighbourhood socio-economic status.CONCLUSION: Adolescent ST remained high throughout secondary school. SB may be well established by early adolescence and track through late adolescence. Our findings suggest the potential need for additional interventions to reduce SB before and over the course of secondary school. KEY WORDS: Sedentary time; linear growth model; longitudinal analysisLa traduction du résumé se trouve à la fin de l'article.

show abstract

Objectively Measured Physical Activity in Sixth-Grade Girls

Cited by 79 publications

References 35 publications

Higher vitamin D intake is needed to achieve serum 25(OH)D levels greater than 50 nmol/l in Québec youth at high risk of obesity

Higher vitamin D intake is needed to achieve serum 25(OH)D levels greater than 50 nmol/l in Québec youth at high risk of obesity

Early life determinants of physical activity and sedentary time: Current knowledge and future research

Trajectories of objectively measured sedentary time among secondary students in Manitoba, Canada in the context of a province-wide physical education policy: A longitudinal analysis

Contact Info

Product

Resources

About