BODY DISSATISFACTION, PHYSICAL ACTIVITY, AND SEDENTARY BEHAVIOR IN FEMALE ADOLESCENTS

ABSTRACT Objective: To evaluate the association of body image with physical activity level, body composition, and sedentary behavior (SB) of female adolescents. Methods: Exploratory cross-sectional study conducted with 120 female adolescents aged between 14-19 years, from the city of Viçosa, Minas Gerais, Southeast Brazil. Body image was evaluated with a Body Silhouette Scale (BSS) and a Body Shape Questionnaire (BSQ). Weight, height, and waist circumference values were analyzed, as well as the waist-to-height ratio and body fat percentage. The physical activity level (PAL) was assessed by 24-hour Physical Activity Recall and SB by screen time, that is, time spent in front of a TV, playing video game, on the computer and using tablets, and, separately, the cell phone time. Results: Mean age was 16.5±1.5 years, and most adolescents were eutrophic (77.6%), sedentary/low PAL (84.2%), with high screen time (85.2%) and cell phone time (58.7%). Body dissatisfaction was stated in 40.6% of BSQ and 45.8% of BSS evaluations. Body distortion was identified in 52.9% of participants. All body composition measures, along with cell phone time and PAL, were associated with body dissatisfaction, the more active adolescents presenting higher levels of dissatisfaction. Conclusions: This study concluded that female adolescents with higher cell phone time also present higher body dissatisfaction, as well as the most physically active ones. All body composition measurements were associated with body dissatisfaction, mainly body mass index, waist circumference, and waist-to-height ratio.

摘要
研究目的：评估女性青少年的身体意象与身体活动水平（physical activity level, PAL）、身体成分及久坐行为（sedentary behavior, SB）之间的关联。
研究方法：本研究为探索性横断面研究，共纳入巴西东南部米纳斯吉拉斯州维索萨市的120名14~19岁女性青少年作为研究对象。采用身体轮廓量表（Body Silhouette Scale, BSS）与身体形态问卷（Body Shape Questionnaire, BSQ）对受试者的身体意象进行评估；同时测量并分析体重、身高、腰围，以及腰高比与体脂百分比。身体活动水平（PAL）通过24小时身体活动回忆法进行评估；久坐行为则通过屏幕用时（即观看电视、玩电子游戏、使用电脑与平板电脑的时长）及单独的手机使用时长进行衡量。
研究结果：受试者平均年龄为16.5±1.5岁，大部分青少年营养状况正常（77.6%）、久坐或身体活动水平偏低（84.2%），且屏幕用时较高（85.2%）、手机使用时长偏长（58.7%）。通过BSQ评估显示40.6%的受试者存在身体不满，通过BSS评估则为45.8%；另有52.9%的受试者存在身体意象扭曲。所有身体成分指标、手机使用时长及身体活动水平均与身体不满显著相关，且身体活动量越高的青少年，其身体不满程度越高。
研究结论：本研究结果表明，手机使用时长更长的女性青少年及身体活动量较高的青少年，其身体不满程度也更高；所有身体成分指标均与身体不满相关，其中尤以身体质量指数（body mass index, BMI）、腰围及腰高比最为显著。