Objective. The primary aim of this study was to quantify the prevalence of overweight and obesity among urban 7 -10-year-old children in affluent (quintile 5) English-medium primary schools in Port Elizabeth. Method. A quantitative, descriptive one-way cross-sectional research design utilising random sampling was used. A once-off survey consisted of anthropometrical assessment of body mass index (BMI) according to standardised procedures. To classify children into weight categories, the International Obesity Task Force z-score BMI cut-off criteria were used. Post-hoc analysis consisted of one-way analysis of variance and χ 2 tests. Level of significance was set at p<0.05. A total of 713 children participated in the study. Results. Overweight prevalence was 20.9% (n=149) and obesity prevalence was 9.8% (n=70). A significant interaction was found for overweight and obesity levels by gender and age (F=7.2, p=0.01). Of the boys (N=372) 18.5% (n=69) were overweight and 6.9% (n=26) were obese. The girls (N=341) had a 23.5% (n=80) overweight rate and 12,9% (n=44) were obese. The highest prevalence of overweight (24.7%, n=43, N=174) was found in children aged 10, and the highest prevalence of obesity (12.5%, n=21, N=167) was found in children aged 8. Conclusion.Results highlighted the rising prevalence of overweight and obesity among urban children from economically privileged settings. Future research into paediatric obesity is needed to curb the growing incidence.S Afr J SM 2014;26(2):55-58.

Objectives. This study aimed to determine the effectiveness of whole body vibration (WBV) training for promoting healthrelated physical fitness in sedentary adults.Design. A non-randomised sampling technique was used with an equivalent match-pair comparison group, pre-and posttest design. Volunteers were gathered through a combination of accidental and snowball sampling and divided into either the experimental (n=32) or control group (n=30). Dependent variables included body mass, hamstring flexibility as measured by the sit-and-reach test, upper-body strength as measured by a grip strength dynamometer, abdominal and upper-body muscular endurance as measured by 1-minute timed sit-up and push-up tests, respectively. The standardised YMCA fitness battery was used as the evaluation protocol. The WBV experimental group participated in a progressive 3 times/week training programme for a maximum duration of 30 minutes/session for 12 consecutive weeks. The control group remained sedentary.Results. Significant improvements in all five of the selected dependent parameters were measured.Conclusion. WBV training 3 times weekly for 30 minutes/ session provides an effective method of exercise intervention for health promotion in sedentary adults over a 12-week period.S Afr J SM 2012;24(2):60-64.

Background. Declining levels of physical activity coupled with the rising incidence of childhood obesity in developing countries are of health concern. Current daily recommendations for preadolescent children are to accumulate 60 min of moderate physical activity per day. In South Africa, physical education forms part of the life skills curriculum, but children have limited school time to engage in physical activity. As many obesogenic behaviours are learnt in childhood and track into adulthood, physical activity should be promoted at a young age and should be a research priority. Objectives. To explore and determine the association between body mass index (BMI) and daily physical activity levels as expressed in metabolic equivalent of task (MET) in 7 -10-year-old children in quintile-5 English-medium primary schools in Port Elizabeth. Methods. A quantitative, descriptive, one-way, cross-sectional design utilising random sampling was used. A once-off survey comprised anthropometric assessment of height and weight of 713 participants. Age-and gender-specific prevalence rates of overweight, obesity and underweight were calculated based on the International Obesity Task Force (IOTF) cut-off points. One-way analysis of variance (ANOVA) and χ 2 tests were performed. A validated once-off interviewer-administered physical activity questionnaire was utilised to determine daily energy costs. Results. The BMI of the majority of children fell within the norm and was coupled with high levels of daily physical activity (average of 893 METs). No significant relationship was found for BMI and physical activity (p=0.8). Conclusion. Daily level of physical activity is not significantly related to BMI in urban children from an economically privileged setting.

Objective. The primary aim of this study was to quantify the prevalence of overweight and obesity among urban 7 -10-year-old children in affluent (quintile 5) English-medium primary schools in Port Elizabeth. Method. A quantitative, descriptive one-way cross-sectional research design utilising random sampling was used. A once-off survey consisted of anthropometrical assessment of body mass index (BMI) according to standardised procedures. To classify children into weight categories, the International Obesity Task Force z-score BMI cut-off criteria were used. Post-hoc analysis consisted of one-way analysis of variance and χ 2 tests. Level of significance was set at p<0.05. A total of 713 children participated in the study. Results. Overweight prevalence was 20.9% (n=149) and obesity prevalence was 9.8% (n=70). A significant interaction was found for overweight and obesity levels by gender and age (F=7.2, p=0.01). Of the boys (N=372) 18.5% (n=69) were overweight and 6.9% (n=26) were obese. The girls (N=341) had a 23.5% (n=80) overweight rate and 12,9% (n=44) were obese. The highest prevalence of overweight (24.7%, n=43, N=174) was found in children aged 10, and the highest prevalence of obesity (12.5%, n=21, N=167) was found in children aged 8. Conclusion.Results highlighted the rising prevalence of overweight and obesity among urban children from economically privileged settings. Future research into paediatric obesity is needed to curb the growing incidence.S Afr J SM 2014;26(2):55-58.

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