Inclinometry Validation and Innovative Evaluation of Sedentary Behavior in Youth

描述（由申请人提供）：美国儿科学会、美国心脏协会、疾病控制和预防中心、医学研究所和世界卫生组织都认识到青少年久坐行为（SB）的有害影响。“久坐”被定义为不能充分提高静息能量消耗的行为，代谢当量为1.0-1.5，加速度计值低于每分钟100次。年轻人是活跃的人，喜欢短暂的行为爆发。SB与肥胖的发展有关。目前的研究估计，近三分之一的青少年超重（85百分位数），16.9%的青少年肥胖（95百分位数）。SB和体重紊乱与早期发病和死亡有关。令人震惊的是，当代人的预期寿命可能比他们的父母短。NINR主任特别提到，需要在SB和肥胖领域找到新的解决方案。与其他群体相比，在过去的几十年里，年龄较大的青少年的SB和肥胖症的增加幅度最大，体育活动的减少幅度最大。有效和可靠的SB测量将加强未来的描述性研究，从而开发新的解决方案和护理干预措施。该试点研究的具体目标是：1)验证斜度测量功能，以测量年龄较大的青少年（18- 19岁）的SB； 2)开发一种创新算法，即久坐结果评分（SOS），使用平均每天久坐时间最长和平均每天总久坐时间，并将它们与体重指数（BMI）百分位数和腰围相关联。该研究旨在验证年龄较大的青少年的倾斜度测量，并采用一种新方法，使用加速度测量和倾斜度测量数据来测量SB。正如总久坐时间与肥胖和其他负面健康结果相关；个体久坐时间的长短与发病率的增加有独立的关系。拟议的研究建立在这一证据的基础上，并通过将BMI和腰围的健康指标与拟议的SOS联系起来的创新方法来推进它。尽管青少年总久坐时间和久坐次数与BMI和腰围显著相关，但这种相关性在强度上是低到中等的。结合两者来提高关联强度的算法尚未探索，鉴于文献中很少有针对SB的客观测量方法，这将是有价值的。本研究的结果有可能促进对青少年SB的理解和测量，影响这一新兴领域的未来干预措施。

DESCRIPTION (provided by applicant): The American Academy of Pediatrics, American Heart Association, Centers for Disease Control and Prevention, Institute of Medicine, and the World Health Organization have all recognized the deleterious effects of sedentary behavior (SB) in youth. "Sedentary" is defined as behaviors that do not sufficiently raise resting energy expenditure, with metabolic equivalents of 1.0-1.5 and accelerometry values of less than 100 counts per minute. Youth are active persons that favor short bursts of behaviors. SB is implicated in the development of obesity. Current research estimates that nearly one third of all youth are overweight (e85th percentile) and 16.9% are obese (e95% percentile). SB and weight disturbances are linked with early morbidity and death. Appallingly, the current generation may have a shorter life expectancy than their parents. The NINR Director has specifically mentioned that fresh solutions need to be found in areas of SB and obesity. Older adolescents in particular have the largest increase in SB and obesity, and the greatest decrease in physical activity over the last few decades compared to other groups. Valid and reliable measures of SB will strengthen future descriptive studies from which fresh solutions and nursing interventions will be developed. The proposed pilot study specifically aims to: 1) validate the inclinometry function to measure SB in older adolescents (18- to 19-year-olds), and, 2) develop an innovative algorithm, the Sedentary Outcome Score (SOS), using the longest average daily sedentary episode and average total daily sedentary time and correlating these with body mass index (BMI) percentile and waist circumference. The proposed study seeks to validate inclinometry in older adolescents and applies a novel method, using both accelerometry and inclinometry data, to measure SB. Just as total sedentary time is associated with obesity and other negative health outcomes; individual sedentary episode length is independently associated with increased morbidities. The proposed study builds on this evidence and advances it using an innovative approach by linking the health indicators of BMI and waist circumference with the proposed SOS. Although total sedentary time and sedentary episodes are significantly correlated with BMI and waist circumference in youth, this correlation is low to moderate in strength. An algorithm combining the two to improve the strength of the association has yet to be explored and would be valuable given that few objective measures specific to SB exist in the literature. Results of this study have the potential to advance how SB is understood and measured in youth, impacting future interventions in this emerging field.