Effect of physical activity on neurocognitive function of overweight children: a systematic review / 中国康复理论与实践

@#Objective To explore the affect of physical activity on neurocognitive function of overweight children.Methods The literatures about the effect of physical activity on neurocognitive function of overweight children were retrieved with subjected retrieval method in CNKI, VIP, Wanfang database, PubMed, Web of Science, EBSCO databases from January, 2000 to January, 2022. The authors, countries, published years, ages of subjects, research methods, intervention time, measurement tools and measurement indicators were extracted.Results Twelve articles were selected finally. These articles came from United States, Italy, Belgium and China, were mainly published in journals of psychology, clinical medicine, neuroscience, physical education. The study design included randomized controlled trials and pre-post-trial. The mean PEDro score was 6.67. The types of physical activity included fitness, skills and sports activities. The overweight children participating in physical activities could benefit from cognition and brain plasticity. On the cognition, physical activity could improve attention, memory, inhibitory control, working memory and cognitive flexibility. In terms of brain plasticity, physical activity could improve the integrity of brain white matter, increase hippocampal volume, enhance brain activation and brain network connectivity.Conclusion Physical activity is a simple and effective form of exercise. It can improve not only attention, memory, executive function and other cognitive functions, but also brain structure and brain function in overweight children. The mechanism of cognition, the interaction between physical activity and other factors, and the dose-relationship between physical activity and cognitive benefits still need to be explored in the future.

Association of screen time with physical activity and BMI in middle school children at Tamil Nadu, India

Background: The objective of this study was to find the association of screen time with physical activity and BMI in middle school children in the age group of 11 to 13 years in Tamil Nadu, India.Methods: This cross-sectional observational study was conducted among 139 middle school children aged 11 to 13 years at the state of Tamil Nadu, India from June 2019 to August 2019. Data regarding screen time and physical activity were collected from the children using a predesigned questionnaire and anthropometric measurements done. The data collected were analyzed with suitable statistical methods using SPSS 25 software.Results: Of the 139 children, 46(33.1%) were 11 years, 48(34.5%) were 12 years and 45(32.4%) were 13 years old. 74(53.2%) were male and 65(46.8%) were female. Majority of the study subjects (52.5%) had an average daily screen time of >120 minutes followed by 61 to 120 minutes (28.8%) and ?60 minutes (18.7%). Of the 139 children studied, only 31.7% (44 children) followed the WHO recommendations of moderate to vigorous physical activity of at least 60 minutes per day, 57.5% of the children had normal BMI, 10.8 % had thinness, 25.2% were overweight and 6.5% were obese. Physical activity was found to decrease with increasing screen time, and this was found to be statistically significant. No statistically significant correlation between screen time and BMI was found. There was statistically significant correlation between physical activity and BMI.Conclusions: There is a significant correlation of screen time with physical activity in this study. Urgent measures need to be taken to decrease screen time and promote a healthy lifestyle.

Clinical profile and factors associated with Non-Alcoholic Fatty Liver Disease (NAFLD) among overweight and obese children: A prospective study

@#<p style="text-align: justify;"><strong>INTRODUCTION:</strong> In the past decades, the prevalence of childhood overweight and obesity has increased worldwide. Childhood obesity has been associated with wide range of serious health complications and increased risk of premature adult illnesses. Non-alcoholic Fatty Liver Disease (NAFLD) was of concern because of limited data among children. The study aims to determine the prevalence and demographic /clinical factors associated with NAFLD among overweight and obese children.</p><p style="text-align: justify;"><strong>METHODOLOGY:</strong> The study was a cross-sectional study among overweight and obese participants aged 2-18 years old. A total of 96 subjects were included. Frequencies and percentages of clinical characteristics were determined. Chi-square, linear correlation and logistic regression analysis for different factors were performed.</p><p style="text-align: justify;"><strong>RESULTS:</strong> Among the 92 subjects, 26 (28%) were overweight while 66 (72%) were obese. The M:F ratio was 1.8:1 and majority belonged to 6-10 years old (44%). As to socioeconomic class, the rity (59%) were from the low-income group. The overall prevalence of NAFLD among overweight and obese subjects was 29.3%. None of the clinical factors (age, gender, socioeconomic status, BMI, waist circumference, actual caloric intake, and dietary fat consumption) were significantly associated with NAFLD. Analysis of biochemical factors revealed that alanine aminotransferase, aspartate aminotransferase, serum triglycerides and total cholesterol were found to be associated with NAFLD. Among which AST and ALT were identified predictors of NAFLD.</p><p style="text-align: justify;"><strong>CONCLUSION:</strong> There was high prevalence of NAFLD among overweight and obese children. Screening among the pediatric population may aid on early identification and prevent its progression. ALT, AST, serum triglycerides and total cholesterol were independently related wih NAFLD. AST and ALT were identified predictors of NAFLD.</p>

Birth weight was negatively correlated with plasma ghrelin, insulin resistance, and coenzyme Q10 levels in overweight children

The purpose of this study was to investigate the relationship between birth weight and appetite related hormones, insulin resistance, and antioxidant status in overweight children aged 9-10 years. Thirty-four healthy overweight children (18 boys, 16 girls) were evaluated with respect to anthropometric measurement, lipid profiles, leptin, ghrelin, glucose, insulin, C-peptide, lipid soluble vitamins, and antioxidant enzyme activities. I found that birth weight was negatively correlated with insulin resistance parameters, ghrelin, and coenzyme Q10 levels. There was a significant positive correlation between present BMI and leptin level, while a negative correlation was noted between the BMI and alpha-tocopherol and lycopene levels. When total subjects were classified into three groups by tertiles of birth weight, the lowest tertile of birth weight (LTB) group showed higher levels of fasting glucose, HOMA-IR, and ghrelin level than the highest tertile of birth weight (HTB) groups. On the other hand, HTB group showed an increased oxidative stress (decreased coenzyme Q10 level and catalase activity) compared to the LTB group. In conclusion, plasma ghrelin level might play an important role in accelerated growth in overweight children with LTB. Increased insulin resistance is present in overweight children with LTB, while decreased coenzyme Q10 and catalase activity in overweight children with HTB. These results suggest that birth weight might be an important factor for determination of treatment for obesity related complications in childhood obesity.

The Relationship between Relative BMI Change and Height Growth among Overweight Children / 가정의학회지

BACKGROUND: Many parents of overweight children have believed that their children's weight may be lost with the increase of their height. The purpose of this 2-year prospective study was to examine whether such belief is valid. METHODS: A total of 190 children (113 boys and 77 girls) aged 6-11 years who were overweight (BMI > 85th percentile of age and gender-specific 1999 Korean children standard) from two elementary schools were the subjects. Their height and weight were measured again after 2 years. Children and their parents completed questionnaires on eating habits and physical activity, and their attitude on weight in the beginning of study. Children's weight status was evaluated using relative BMI. RESULTS: Children's baseline relative BMI was 134.9 +/- 13.8%. About 60% of the children reported weight loss attempt and 49% of their parents tried to persuade their child to lose weight. Children's BMI increased by 1.6 +/- 2.1 kg/m2 and their relative BMI decreased by 1.2 +/- 12.1% over 2 years. While children's eating habits and physical activity, and their attitude on the child's weight were not related to the 2-year relative BMI change, the child's age, gender, baseline relative BMI, and the 2-year height change were associated with the 2-year relative BMI change (R2 = 0.15, P < 0.001). The 2-year relative BMI increased with the 2-year height increase after controlling for the three predictors (B = 0.86, SE = 0.28, P = 0.002). CONCLUSION: We found the 2-year height change positively associated with the 2-year relative BMI change among school-aged overweight children. Then, the belief that children's weight status may be improved with the increase of their height should be denied.