The World Health Organization set a target of a 15% relative reduction in the prevalence of insufficient physical activity (IPA) by 2025 among adolescents and adults globally. In Bangladesh, there are no national estimates of the prevalence of IPA among adolescents. The aim of this study was to estimate the prevalence of and risk factors associated with IPA among adolescent girls and boys. Data for 4865 adolescent girls and 4907 adolescent boys, collected as a part of a National Nutrition Surveillance in 2018–19, were analysed for this study. A modified version of the Global Physical Activity Questionnaire (GPAQ) was used to collect physical activity data. The World Health Organization recommended cut-off points were used to estimate the prevalence of IPA. Bivariate and multivariable logistic regression was performed to identify factors associated with IPA. Prevalences of IPA among adolescent girls and boys were 50.3% and 29.0%, respectively, and the prevalence was significantly higher among early adolescents (10–14 years) than late adolescents (15–19 years) among both boys and girls. The IPA prevalence was highest among adolescents living in non-slum urban areas (girls: 77.7%; boys: 64.1%). For both boys and girls, younger age, non-slum urban residence, higher paternal education and increased television viewing time were significantly associated with IPA. Additionally, residing in slums was significantly associated with IPA only among the boys. Higher maternal education was associated with IPA only among the girls. This study identified several modifiable risk factors associated with IPA among adolescent boys and girls in Bangladesh. These factors should be addressed through comprehensive public health interventions to promote physical activity among adolescent girls and boys.

世界卫生组织设定了一个目标，即到 2025 年，全球青少年和成年人的体力活动不足 (IPA) 发生率相对降低 15%。在孟加拉国，没有关于青少年 IPA 流行率的全国性估计。本研究的目的是估计青春期女孩和男孩中 IPA 的患病率和相关风险因素。本研究分析了作为 2018-19 年国家营养监测的一部分收集的 4865 名少女和 4907 名青春期男孩的数据。全球体育活动问卷 (GPAQ) 的修改版本用于收集体育活动数据。世界卫生组织推荐的分界点被用来估计 IPA 的患病率。进行双变量和多变量逻辑回归以确定与 IPA 相关的因素。青春期女孩和男孩的 IPA 患病率分别为 50.3% 和 29.0%，并且在男孩和女孩中，早期青少年（10-14 岁）的患病率显着高于青少年晚期（15-19 岁）。IPA 患病率在非贫民区城市地区的青少年中最高（女孩：77.7%；男孩：64.1%）。对于男孩和女孩来说，年龄较小、非贫民区城市居住、较高的父亲教育和增加的电视观看时间与 IPA 显着相关。此外，居住在贫民窟仅与男孩的 IPA 显着相关。仅在女孩中，较高的孕产妇教育与 IPA 相关。本研究确定了孟加拉国青少年男孩和女孩中与 IPA 相关的几个可改变的风险因素。应通过全面的公共卫生干预措施来解决这些因素，以促进青春期女孩和男孩的身体活动。