The Effects of Short, Frequent Breaks in Sitting Versus Longer, Planned Breaks in Sitting on Sedentary Behavior and Metabolic Health Among Inactive Females Working Sedentary Jobs
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 49
- 主要终点
- Change in sedentary behavior during the workday
研究概览
简要总结
The purpose of this study is to determine whether varying the frequency and length of activity breaks during the workday will differentially impact sedentary behavior and health outcomes. Participants will be randomly assigned to take short, frequent breaks (i.e., 1 minute every half hour) or longer, planned breaks (i.e., two 15-minute walks) from sitting during the workday. They will be instructed to follow the assigned protocols for an 8-week intervention and the effects of their participation on sedentary behavior and a variety of health outcomes will be assessed. The investigators anticipate participants in both intervention arms will demonstrate significant reductions in daily sitting time, bit do not have an a priori hypothesis regarding the relative effectiveness of each approach.
详细描述
The purpose of this study is to determine whether varying the frequency and length of activity breaks during the workday will differentially impact sedentary behavior and health outcomes. Women aged 25-50 who work full-time in sedentary jobs and participate in less than 60 minutes of overall physical activity per week will be recruited. At the beginning of the study participants will visit the laboratory to complete baseline health assessments and meet with a research assistant to outline their plan for reducing sitting time at work. At this time they will be randomly assigned to one of two groups: 1) Group A will be asked to take two 15-minute walks during each workday, or 2) Group B will be asked to stand up and move around for 1-2 minutes every half hour throughout the workday. The total duration of this program will be eight weeks. During this time participants will be asked to keep a brief daily log of their activity breaks during the workday. At the end of the 8-week program participants will return to the laboratory to repeat the health assessments.
ASSESSMENTS:
All participants will complete the following tests and procedures:
- Metabolic blood panel. Blood will be drawn from a quick finger stick to assess total cholesterol, triglycerides, LDL, HDL, and fasting glucose.
- DEXA scan. Participants will lie down on a body scanner for about 10 minutes to assess body composition.
- Body measurements. A trained research assistant will measure height, weight, and waist circumference.
- Blood pressure. A trained research assistant will measure blood pressure using an automated blood pressure cuff.
In addition, participants will complete the following assessments outside of the laboratory:
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 25 Years 至 50 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Work at least 35 hours per week
- •Spend at least 80% of working hours sitting (self-reported)
- •Engage in less than 60 minutes per week of leisure-time exercise (self-reported)
- •Not pregnant or planning to become pregnant in the next 3 months
- •Not currently trying to change weight
- •Speak English
- •Able to attend assessments
- •Willing to wear accelerometer
- •No anticipated significant conflicts during 8-week intervention
排除标准
- •Working less than 35 hours per week
- •Spend >25% of working hours standing or active
- •Engage in more than 60 minutes per week of leisure-time exercise
- •Actively dieting or attempting to change weight
结局指标
主要结局
Change in sedentary behavior during the workday
时间窗: Baseline - week 8
Measured by GT3X accelerometer
次要结局
- Change in weight(Baseline - week 9)
- Change in body composition(Baseline - week 9)
- Change in energy, tiredness, tension, and calmness(Baseline - week 8)
- Change in blood pressure(Baseline - week 9)
- Change in resting heart rate(Baseline - week 9)
- Change in total cholesterol, HDL cholesterol, LDL cholesterol(Baseline - week 9)
- Change in triglycerides(Baseline - week 9)
- Change in fasting blood glucose(Baseline - week 9)
- Change in waist circumference(Baseline - week 9)
- Change in fatigue severity, interference, and duration(Baseline - week 8)
- Change in mood(Baseline - week 8)
- Change in overall self-reported physical activity(Baseline - week 8)
- Change in overall objectively measured physical activity(Baseline - week 8)
- Change in diet quantity(Baseline - week 8)
- Change in diet quality(Baseline - week 8)
- Adherence to assigned protocols(up to 8 weeks)
研究者
Emily Mailey
Assistant Professor
Kansas State University