Comparison of Supervised and Unsupervised Physical Activity Programs During a Weight Loss Intervention for Adults (REACH)
Comparison of Supervised and Unsupervised Physical Activity Programs During a Standard Behavioral Weight Loss Intervention for Adults Who Are Overweight or Obese
研究概览
详细说明
Approximately 69% of the U.S. adult population is overweight, defined by a body mass index (BMI) of ≥ 25.0 kg/m2, and 35% are obese (BMI ≥ 30.0 kg/m2), with the prevalence of overweight and obesity rising drastically over the past several decades. Adults who are overweight or obese are typically recommended to change lifestyle factors (e.g. diet, physical activity, etc.) to lose weight and improve health. When evaluating the effects of these lifestyle changes on weight and health in a research setting, physical activity is supervised (i.e. physical activity completed in a health-fitness facility with direct supervision from trained staff). With supervised physical activity, researchers are able to quantify the frequency, intensity, duration, and type of physical activity. Thus, supervised physical activity is considered the gold-standard when evaluating the effects of physical activity on weight and other physiological parameters. However, the results of supervised physical activity trials may not translate to clinical settings. A typical clinical approach prescribes physical activity in an unsupervised manner (i.e. physician tells patient to be more physically active or take more steps/day). Unsupervised physical activity can be done in any environment or at any time that best suits the individual. Knowing the effects of unsupervised physical activity is important because of the translation of this type of physical activity to non-research settings. Therefore, knowing the magnitude of the physiological effects of unsupervised physical activity compared to supervised physical activity at the same prescribed intensity and dose is of clinical and public health importance especially in an overweight and obese population. This study is designed to provide insight on these important research questions that can inform future research and the application to clinical, public health, and health-fitness settings.
Participants will be randomized to one of three groups: supervised physical activity prescribed in min/week (SUP-PA), unsupervised physical activity prescribed in min/week (UNSUP-PA), and unsupervised physical activity prescribed in steps/day (STEP). Participants in all three groups will participate in a behavioral weight loss intervention which includes dietary counseling and weekly group sessions during the 12-week program. SUP-PA will be prescribed 150 minutes/week of moderate-to-vigorous physical activity (MVPA) completed under direct supervision of trained staff at a designated health-fitness facility. UNSUP-PA will be prescribed a physical activity dose matched to SUP-PA. STEP will be prescribed a 10,000 step/day recommendation with 2,500 of those steps completed at a "brisk" pace. The primary aim of this study is to compare the effects of all three groups on moderate-to-vigorous physical activity (MVPA) accumulated in bouts of at least 10 minutes. The primary outcome will be assessed at baseline, week 4, week 8, and week 12. Secondary aims of this trial include comparing light intensity physical activity, sedentary time, cardiorespiratory fitness, weight, body composition, waist circumference measures, physical activity self-efficacy, blood pressure, and dietary intake across all three groups. Secondary aims will be assessed at baseline and week 12.
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
学习地点
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Pennsylvania
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Pittsburgh、Pennsylvania、美国、15261
- Physical Activity and Weight Management Research Center
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
Inclusion Criteria:
- Male or Female
- Aged 18-55 years old
- BMI of 25.0 to <40.0 kg/m2
- Ability to provide informed consent
- Ability to provide physician's clearance to participate in a weight loss intervention
Exclusion Criteria:
- Engaging in >60 min/wk (accumulated in bouts of ≥10 minutes) of moderate-to-vigorous physical activity over the past month
- Presence of contraindications to physical activity as identified on a physical activity readiness questionnaire (PAR-Q)
- History of metabolic, cardiac, or pulmonary disease that classifies the individual as high risk by the American College of Sports Medicine (e.g., coronary heart disease, diabetes mellitus, uncontrolled hypertension, etc.)
- History of myocardial infarction, coronary bypass surgery, angioplasty, or other cardiovascular- related surgeries.
- Taking medication that may affect heart rate or blood pressure responses to physical activity
- Resting systolic blood pressure ≥150mmHg or diastolic blood pressure ≥100mmHg.
- Medication that may affect body weight/metabolism (e.g., synthroid).
- Current or previous participation in a physical activity or weight management research project in the past 6 months
- Weight loss of ≥5% or 15 pounds total of current body weight in the previous 6 months.
- Currently being treated for an eating disorder (e.g., anorexia, bulimia, etc.)
- Previously undergone bariatric surgery (e.g., lap-band, gastric bypass, etc.)
- For women, those currently pregnant, pregnant during the previous 6 months, or plan on becoming pregnant in the next 6 months
- Currently being treated for any psychological issues or problems, taking any psychotropic medications, or receiving treatment with psychotropic medications within the previous 6 months.
- Being out of town during for an extended amount of time during the weight loss intervention which may affect participation in the study
- Currently using a physical activity monitor to track activity (e.g., Jawbone UP, Fitbit, etc.)
学习计划
研究是如何设计的?
设计细节
- 主要用途:治疗
- 分配:随机化
- 介入模型:并行分配
- 屏蔽:单身的
武器和干预
参与者组/臂 |
干预/治疗 |
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实验性的:Supervised (SUP-PA)
Weight loss intervention that focuses on supervised physical activity and involves an energy restricted diet.
Physical activity will be supervised by trained staff.
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Weight loss intervention that involves an energy restricted diet plus the inclusion of 150 minutes per week of supervised moderate-to-vigorous intensity physical activity.
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实验性的:Unsupervised (UNSUP-PA)
Weight loss intervention that focuses on unsupervised physical activity (identical dose to SUP-PA) and involves an energy restricted diet (identical diet to SUP-PA).
Physical activity will be self-monitored but no activity tracker will be used as an intervention tool.
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Weight loss intervention that involves an energy restricted diet plus the inclusion of 150 minutes per week of unsupervised moderate-to-vigorous intensity physical activity.
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实验性的:Step-based (STEP)
Weight loss intervention that focuses on unsupervised physical activity prescribed as steps/day and involves an energy restricted diet (identical diet to SUP-PA and UNSUP-PA).
Physical activity will be self-monitored and a pedometer will be used to track steps/day.
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Weight loss intervention that involves an energy restricted diet plus the inclusion of physical activity in the form of 10,000 steps/day with 2,500 "brisk" steps/day.
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
大体时间 |
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Change in Moderate-to-Vigorous Physical Activity (Accumulated in Bouts of at Least 10 Minutes)
大体时间:Baseline (0 weeks), 4 Weeks, 8 Weeks, 12 Weeks
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Measured using a wearable device and by questionnaire
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Baseline (0 weeks), 4 Weeks, 8 Weeks, 12 Weeks
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
---|---|---|
Change in Cardiorespiratory Fitness
大体时间:Baseline (0 weeks),12 Weeks
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Measured using a submaximal graded exercise test on a treadmill, with termination occurring at 85% of age-predicted maximal heart rate (computed at [220-age]*0.85]).
The outcome was measures as oxygen consumption (ml/kg/min) at the point of test termination.
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Baseline (0 weeks),12 Weeks
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Change in Body Weight
大体时间:Baseline (0 weeks),12 Weeks
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Measured in kilograms using a digital scale
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Baseline (0 weeks),12 Weeks
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Change in Fat Mass
大体时间:Baseline (0 weeks),12 Weeks
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Measured as fat mass (kg) using dual-energy x-ray absorptiometry (DXA)
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Baseline (0 weeks),12 Weeks
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Change in Energy Intake
大体时间:Baseline (0 weeks),12 Weeks
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Measured as kcal/day using a questionnaire
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Baseline (0 weeks),12 Weeks
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合作者和调查者
调查人员
- 首席研究员:Seth A Creasy、University of Pittsburgh
- 学习椅:John M Jakicic、University of Pittsburgh
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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Supervised (SUP-PA)的临床试验
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Global Alliance for TB Drug Development完全的
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Rush University Medical CenterUniversity of Illinois at Chicago; Michigan State University主动,不招人
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Hospices Civils de LyonInstitut National de la Santé Et de la Recherche Médicale, France; Centre National de la Recherche... 和其他合作者招聘中