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Breaking up Prolonged Sedentary Behavior to Improve Cardiometabolic Health: An Adaptive Dose-Finding Study

打破长时间久坐行为以改善心脏代谢健康：一项适应性剂量探索研究

基本信息

批准号：
10667379
负责人：
Ken Cheung
金额：
$ 76.38万
依托单位：
COLUMBIA UNIVERSITY HEALTH SCIENCES
依托单位国家：
美国
项目类别：
财政年份：
2021
资助国家：
美国
起止时间：
2021-05-05 至 2026-04-30
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10667379
关键词：
Address Adult Advisory Committees Advocate Affect American American Heart Association Behavioral trial Blood Glucose Blood Pressure Cardiovascular Diseases Cohort Studies Data Developed Countries Development Diastolic blood pressure Dose Effectiveness Elements Emotions Epidemic Exhibits Fatigue Foundations Frequencies Future Glucose Guidelines Health Health Benefit Hour Hypoglycemia Interruption Intervention Laboratories Link Maximum Tolerated Dose Measures Methods Moods Morbidity - disease rate Outcome Participant Performance Persons Phase Physical activity Process Protocols documentation Public Health Randomized Randomized, Controlled Trials Recommendation Reporting Research Risk Risk Factors Safety Smoking Standardization Strenuous Exercise Testing Time Visit Walking Work adverse outcome cardiometabolism cardiovascular disorder prevention cardiovascular disorder risk cardiovascular risk factor dose information energy balance evidence base evidence based guidelines exhaustion experimental study improved innovation mortality phrases psychological distress randomized trial recruit sedentary sedentary lifestyle success therapy development uptake vigorous intensity

项目摘要

Excessive sedentary behavior is highly prevalent in developed nations and is a risk factor for cardiovascular disease (CVD) morbidity and mortality. Evidence suggests sedentary behavior is not simply a form of inactivity that elicits positive energy balance. Instead sedentary behavior itself may be harmful. As such, health agencies have provided general recommendations to “sit less, move more” by interspersing brief periods of activity. However, a lack of empirical evidence describing how often (e.g. every 30 min, every 60 min) and for how long (e.g. 1 min activity bouts, 5 min activity bouts) sedentary time should be interrupted (a “sedentary break”) to yield health benefit has precluded more quantitative, actionable guidelines. To date, rigorous and methodical dose escalation experiments have not been conducted to elucidate efficacious and tolerated sedentary break doses. Without specific targets to provide to the public; public health initiatives targeting sedentary behavior will likely have minimal effectiveness. Critically, without rigorously tested dosing information; randomized controlled trials targeting sedentary behavior may be fruitless; bearing risk of inefficacious or intolerable doses. The objective of the proposed study is to determine the minimally effective dose (e.g. the smallest dose) for two elements of a sedentary break, frequency and duration, that yields improvements in established CVD risk factors. We will also determine the maximally tolerated dose (e.g. the highest dose that does not cause undue physical/psychological distress) for both frequency and duration of sedentary breaks. To address our aims, we will conduct a state-of-the-art dose finding study under well controlled laboratory conditions using an innovative Bayesian adaptive randomization method for dose determination never before applied to behavioral trials. This method will enable us to efficiently test 25 possible frequency/duration combinations in just a single study. We will recruit 324 adults to complete a total of 2 trial conditions in the laboratory (8 hours each), namely a sedentary break (active) condition and an uninterrupted sitting (control) condition, in a randomized order. The sedentary break condition will consist of 1 of 25 possible frequency/duration combinations (e.g. every 30 min for 10 min), selected according to the adaptive randomization protocol. Established CVD risk factors, including blood pressure and glucose, as well as measures of dose tolerability (physical exhaustion/fatigue, affect) and work engagement and performance will be serially assessed during each trial. We view this project as a groundbreaking step towards developing evidence-based guidelines for sedentary behavior that will establish a foundation upon which a successful sedentary behavior intervention development process can be rooted. By identifying the minimally effective and maximally tolerated dose combinations for the frequency and duration of a sedentary break; this study will provide key foundational evidence critical to the success of future Phase III and Phase IV randomized trials and ultimately public health guidelines.

久坐行为在发达国家非常普遍，是心血管疾病的危险因素