Association between bullying victimization and physical fitness among children and adolescents

Background/ObjectiveThe aim of the study was to analyze the relationship between being bullied and the physical fitness components, and to determine whether a healthy physical fitness level is related with lower victimization in children and adolescents with overweight and obesity compared to unfit overweight/obese peers. Method:The present cross-sectional study included a total of 7,714 youths (9-17 years), categorized as normal-weight or overweight/obese and fit or unfit according to sex-specific handgrip strength and cardiorespiratory fitness (CRF) cut-points. Bullying (physical, verbal, social exclusion, sexual harassment, and cyberbullying) was assessed through the Standard Health Behavior in School-aged Children survey questions. Results:Boys and girls that were categorized as fit (healthy level of CRF) showed lower traditional bullying compared to unfit counterparts. Also, a healthy level of CRF could be a protective factor of traditional bullying among overweight/obese youths compared to unfit overweight/obese peers. Conclusions:CRF is related with lower risk for experiencing traditional bullying in Latino youths with and without obesity, thus emphasizing the role of fitness even among youth with excess of adiposity.     

Idealized media images and adolescent body image: "comparing" boys and girls

Sociocultural theories of body image suggest that body dissatisfaction results from unrealistic societal beauty ideals, and one way of transmitting these ideals is through the mass media. The present research aimed to examine the effect of exposure to images of idealized beauty in the media on adolescent girls’ and boys’ body image. The participants (595 adolescents) viewed television commercials containing either images of the thin ideal for women, images of the muscular ideal for men, or non-appearance television commercials. Body dissatisfaction was measured before and after commercial viewing. It was found that exposure to idealized commercials led to increased body dissatisfaction for girls but not for boys. Idealized commercials led to increased negative mood and appearance comparison for girls and boys, although the effect on appearance comparison was stronger for girls. Further, participants high on appearance investment reported greater appearance comparison after viewing idealized commercials than those less strongly invested in their appearance. The results suggest the immediate impact of the media on body image is both stronger and more normative for girls than for boys, but that some boys may also be affected.     

Duchenne型肌营养不良基因诊断技术的发展及其哲学评析

Duchenne型肌营养不良（DMD）是发病率较高的神经系统遗传病,其基因突变机制复杂,探索简便、准确的基因突变检测技术是DMD研究的热点之一。随着分子生物学的进展,DMD基因诊断技术不断发展,经历了DNA印迹杂交、聚合酶链反应、生物芯片、多重连接探针扩增等。其发展过程带给我们许多哲学思考。