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Preschool children's physical activity intensity during school time: Influence of school schedule.

ABSTRACT: Chile's Physical Activity Report Card graded the overall index on PA behavior with an F The Ministry of Sports is implementing since 2014 "Jardín Activo" (JA program) which recommends 3 weekly teacher-led PE lessons for preschool children, on half or full day attendance. We determined the effectiveness of the JA program (contribution to MVPA during school time) and assessed if effectiveness varied according to schedule. 596 five y olds, (50% boys) were selected from 66 schools; 52.9% attended half day and 47.1% full day. Children wore accelerometers during school time a day with and one without PE lesson (JA day/non JA day). We compared PA intensity between both these days by gender, using descriptive statistics and t-tests and determined the differential effect on PA intensity, between non JA and JA days by school schedule, using mixed models analyses We compared β of sedentary and of MVPA by schedule with t-tests. Significant differences were found in PA intensity between both days within each gender. Minutes being sedentary were significantly less during JA days (14 and 15 min in boys and girls respectively); MVPA significantly higher in JA days (11 and 10 min respectively). % time children were sedentary and % they engaged in MVPA differed by schedule. Sedentary minutes were significantly higher (β - 16.2 vs - 13.2) in half day, while the increase in MVPA was significantly higher (β 12.5 vs 9.7) in full day. The JA program is effective, especially when children attend school full time.

SUBMITTER: Kain J

PROVIDER: S-EPMC5554917 | biostudies-other | 2017 Dec

REPOSITORIES: biostudies-other

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Project description:ObjectiveThe aim of this study was to investigate the association between preschool playground size, formalized physical activity (PA) policies, time spent outdoors and preschool teacher's levels of PA and children's objectively assessed levels of PA and sedentary time (ST) during preschool hours.MethodsIn total, 369 children and 84 preschool teachers from 27 preschools in Södermalm municipally, Stockholm Sweden wore an Actigraph GT3X+ accelerometer during 7 consecutive days. Preschool environmental and structural characteristics were measured via the Environment and Policy Evaluation Self-Report (EPAO-SR) instrument and time in- and outdoors was recorded by preschool teachers during the PA measurements. Weight and height of children were measured via validated scales and parents filled out a questionnaire on demographical and descriptive variables. Linear mixed models, nested on preschool level, were used to assess the association between predictors and outcomes.ResultsThe mean child age was 4.7 years (SD 0.8) and 45% were girls. We found that children were more active in preschools with a formalized PA policy, compared to preschools without such a policy, but not less sedentary. The association between policy and activity seemed to be more pronounced when accounting for other environmental factors. Similar associations were found in children spent most time outdoors (uppermost quartile) compared with children spent least time outdoors (Lowermost quartile). Preschool teachers' light PA (LPA) (ß = 0.25, P = 0.004) and steps (ß = 0.52, P<0.001) were associated with children's LPA and steps while the preschool playground size showed no association with PA in children, when accounting for other environmental factors.ConclusionThe current study showed that preschool structural characteristics such as formalized PA policies and more time spent outdoors were positively associated with children's PA. These findings suggest that formalized PA policies and time outdoors may be of importance for promoting children's PA during preschool hours.

Project description:BackgroundChildhood obesity is an epidemic. Strategies are needed to promote children's healthy habits related to diet and physical activity. School gardens have the potential to bolster children's physical activity and reduce time spent in sedentary activity; however little research has examined the effect of gardens on children's physical activity. This randomized controlled trial (RCT) examines the effect of school gardens on children's overall physical activity and sedentary behavior; and on children's physical activity during the school day. In addition, physical activity levels and postures are compared using direct observation, outdoors, in the garden and indoors, in the classroom.Methods/designTwelve New York State schools are randomly assigned to receive the school garden intervention or to serve in the wait-list control group that receives gardens and lessons at the end of the study. The intervention consists of a raised bed garden; access to a curriculum focused on nutrition, horticulture, and plant science and including activities and snack suggestions; resources for the school including information about food safety in the garden and related topics; a garden implementation guide provided guidance regarding planning, planting and maintaining the garden throughout the year; gardening during the summer; engaging volunteers; building community capacity, and sustaining the program. Data are collected at baseline and 3 post-intervention follow-up waves at 6, 12, and 18 months. Physical activity (PA) "usually" and "yesterday" is measured using surveys at each wave. In addition, at-school PA is measured using accelerometry for 3 days at each wave. Direct observation (PARAGON) is used to compare PA during an indoor classroom lesson versus outdoor, garden-based lesson.DiscussionResults of this study will provide insight regarding the potential for school gardens to increase children's physical activity and decrease sedentary behaviors.Trial registrationClinicaltrial.gov # NCT02148315.

Project description:BackgroundImproving physical activity and reducing sedentary behavior represent important areas for intervention in childhood in order to reduce the burden of chronic disease related to obesity and physical inactivity in later life. This paper aims to determine the cost-effectiveness of a multi-arm primary school-based intervention to increase physical activity and/or reduce sedentary time in 8-9 year old children (Transform-Us!).MethodsModelled cost-utility analysis, using costs and effects from a cluster randomized controlled trial of a 30-month intervention that used pedagogical and environmental strategies to reduce and break up sedentary behaviour (SB-I), promote physical activity (PA-I), or a combined approach (PA + SB-I), compared to current practice. A validated multiple-cohort lifetable model (ACE-Obesity Policy model) estimated the obesity and physical activity-related health outcomes (measured as change in body mass index and change in metabolic equivalent task minutes respectively) and healthcare cost-savings over the cohort's lifetime from the public-payer perspective, assuming the intervention was delivered to all 8-9 year old children attending Australian Government primary schools. Sensitivity analyses tested the impact on cost-effectiveness of varying key input parameters, including maintenance of intervention effect assumptions.ResultsCost-effectiveness results demonstrated that, when compared to control schools, the PA-I and SB-I intervention arms were "dominant", meaning that they resulted in net health benefits and healthcare cost-savings if the intervention effects were maintained. When the costs and effects of these intervention arms were extrapolated to the Australian population, results suggested significant potential as obesity prevention measures (PA-I: 60,780 HALYs saved (95% UI 15,007-109,413), healthcare cost-savings AUD641M (95% UI AUD165M-$1.1B); SB-I: 61,126 HALYs saved (95% UI 11,770 - 111,249), healthcare cost-savings AUD654M (95% UI AUD126M-1.2B)). The PA-I and SB-I interventions remained cost-effective in sensitivity analysis, assuming the full decay of intervention effect after 10 years.ConclusionsThe PA-I and SB-I Transform-Us! intervention arms represent good value for money and could lead to health benefits and healthcare cost-savings arising from the prevention of chronic disease in later life if intervention effects are sustained.Trial registrationInternational Standard Randomized Controlled Trial Number (ISRCTN83725066). Australia and New Zealand Clinical Trials Registry Number (ACTRN12609000715279).

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Preschool children's physical activity intensity during school time: Influence of school schedule.

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