Sylwer fod y cymhwysiad hwn dan ddatblygiad. Os ydych chi'n gweld unrhyw gamgymeriadau neu os nad yw rhywbeth yn gweithio, cysylltwch â ni yn evidence.service@wales.nhs.uk.
Adolygiad Systematig
Dywed yr awduron: "The purpose of this review update is to summarise the evidence on effectiveness of school-based interventions in increasing moderate to vigorous physical activity and improving fitness among children and adolescents 6 to 18 years of age. Specific objectives are: to evaluate the effects of school-based interventions on increasing physical activity and improving fitness among children and adolescents; to evaluate the effects of school-based interventions on improving body composition; and to determine whether certain combinations or components (or both) of school-based interventions are more effective than others in promoting physical activity and fitness in this target population."
Dywed yr awduron:
"Based on the three new inclusion criteria, 16 of the 44 studies included in the previous version of this review were excluded. Results show that school-based physical activity interventions probably result in little to no increase in time engaged in moderate to vigorous physical activity (mean diCerence (MD) 0.73 minutes/d, 95% confidence interval (CI) 0.16 to 1.30; 33 studies; moderate-certainty evidence) and may lead to little to no decrease in sedentary time (MD -3.78 minutes/d, 95% CI -7.80 to 0.24; 16 studies; low-certainty evidence).
School-based physical activity interventions may improve physical fitness reported as maximal oxygen uptake (VO2max) (MD 1.19 mL/kg/min, 95% CI 0.57 to 1.82; 13 studies; low-certainty evidence). School-based physical activity interventions may result in a very small decrease in BMI z-scores (MD -0.06, 95% CI -0.09 to -0.02; 21 studies; low-certainty evidence) and may not impact BMI expressed as kg/m2 (MD -0.07, 95% CI -0.15 to 0.01; 50 studies; low-certainty evidence). Whether school-based physical activity interventions impact health-related quality of life or adverse events is uncertain."
Dywed yr awduron: "Given the variability of results and the overall small effects, school staff and public health professionals must give the matter considerable thought before implementing school-based physical activity interventions. Given the heterogeneity of effects,the risk of bias, and findings that the magnitude of effect is generally small, results should be interpreted cautiously."