Relationship between BMI nutritional status and physical fitness of children and adolescents aged 6-18 in Ningxia in 2019 / 中国学校卫生

Objective@#To understand the nutritional status and physical quality of children and adolescents aged 6-18 in Ningxia in 2019, so as to provide scientific basis for health promotion children and adolescents.@*Methods@#A total of 16 076 children and adolescents aged 6-18 years old from Ningxia were selected by multi stage stratified cluster random sampling. Weight, height and physical fitness indexes (50 m running, standing long jump, sitting forward flexion) were measured and analyzed. The Chi square test was carried out to compare differences between groups, and the relationship between nutritional status and physical fitness was assessed by Logistic regression models.@*Results@#In 2019, detection rate of stunting loss rate, overweight and obesity rate of children and adolescents aged 6-18 in Ningxia were 6.9%, 12.6% and 8.7%, respectively. The below average rates of sitting forward flexion, 50 m running and standing long jump were 10.0%, 8.6% and 26.7%, respectively, while the passing rates were 63.5%, 63.7% and 55.5%, respectively. The good rates were 14.7%, 11.7% and 12.3%, and the excellent rates were 11.8%, 16.0 % and 5.5%, respectively. The passing rates of sitting forward flexion, 50 m running and standing long jump in stunting group were lower than those in the normal weight group ( OR=0.75, 0.72, 0.77, P ＜0.05); the passing rates of 50 m run and standing long jump in the overweight group was lower than that of normal weight group ( OR=0.79, 0.52, P ＜0.05); the passing rates of sitting forward flexion, 50 m running and standing long jump in the obese group were lower than those in the normal weight group ( OR=0.73, 0.52, 0.32, P ＜0.05).@*Conclusion@#In 2019, children and adolescents in Ningxia have the doublel burden of stunting, overweight and obesity. Physical fitness is associated with nutritional status, suggesting weight control might be helpful to keep fitness among children and adolescents.

Comparison of different puncture methods in C57BL/6 mouse tail veins / 中国比较医学杂志

Objective Four different methods were examined to identify a safer and more reliable method for tail vein punctures in C57BL/6 mice. Methods In total,320 mice were randomly divided into four groups: a blank group, incandescent lamp baking method group,three-line method group,and combined method group. Blood samples were taken from the left or right peripheral vein of puncture mice. Puncture success rate of each group was recorded. SPSS 13.0 software was used to compare statistical difference among groups. Results Compared with the blank group,success rates of the other three methods were significantly higher(P < 0.001). Further, the three-line method was better than the incandescent lamp baking method(P< 0.001). The success rate of the combined method was significantly higher than the three-line and incandescent lamp baking methods(P< 0.001). Conclusions The combined method greatly improved the success rate of tail vein punctures in C57BL/6 mice. This method is more reliable and should be more widely used in the future.