Step-reduction in Older Men and Women (CDA-SR)
2017年1月31日 更新者：Stuart Phillips、McMaster University
The Influence of Acute Physical Inactivity on Metabolic Function in Older Men and Women
This study investigates the effects of two weeks of reduced daily ambulation and a subsequent return to normal physical activity on metabolic health of older adults.
研究概览
地位
完全的
详细说明
Aging results in a progressive loss of muscle mass that is accelerated by periods of muscular disuse, common for older adults during hospitalization or convalescence from illness.
Transient physical inactivity has been shown to cause muscular atrophy and impairments in insulin sensitivity in both younger and older adults.
However, the recovery capacity of older adults after such physical inactivity remains unknown.
This study aims to determine the impact of two weeks of daily step reduction to ≤1000 steps per day, an experimental model mimicking short-term physical inactivity, on glycemic control in older adults and further investigate whether older adults are able to recover from the consequences of this inactivity simply by returning to their habitual activity for 14 days.
研究类型
介入性
注册 (实际的)
22
阶段
- 不适用
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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Ontario
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Hamilton、Ontario、加拿大、L8S 4K1
- Exercise Metabolism Research Laboratory, McMaster Univeristy
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
65年 至 80年 (年长者)
接受健康志愿者
是的
有资格学习的性别
全部
描述
Inclusion Criteria:
- Non-smoker
Exclusion Criteria:
- Use of assistive walking devices
- Chronic use of analgesic or anti-inflammatory drugs
- History of neuromuscular problems or muscle and/or bone wasting disease
- Acute or chronic illness including cardiac, pulmonary, liver or kidney abnormalities, uncontrolled hypertension, insulin or non-insulin dependent diabetes or other metabolic disorders
- Daily use of statins, particularly simvastatin and atorvastatin
- Use of medications known to affect protein metabolism
- Normally complete fewer than 3000 steps per day
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
- 主要用途：基础科学
- 分配：不适用
- 介入模型：单组作业
- 屏蔽：无（打开标签）
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
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实验性的：Change in physical activity for older adults
Older adult participants undergo alterations in daily ambulation by completing Normal Daily Steps for one week, followed by a two-week Step-Reduction and a subsequent Return to Normal Daily Steps for two weeks
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Complete normal daily ambulation for one week
Reduce daily ambulation to fewer than 1000 steps per day for two weeks
Increase daily ambulation to 100% of normal daily step-count for two weeks
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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 Insulin Sensitivity
大体时间：Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Assessed via Matsuda ISI
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Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Change in lean tissue mass
大体时间：Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Assessed via Dual Energy X-Ray Absorptiometry
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Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Change in Peak Isometric Maximal Voluntary Leg Extension Strength
大体时间：Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Assessed via muscle dynamometry
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Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Change in Muscle Protein Synthesis
大体时间：Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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Obtained via vastus lateralis muscle biopsy
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Measured at the end of each behavioural intervention (Week 1, Week 3, Week 5)
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
- Breen L, Stokes KA, Churchward-Venne TA, Moore DR, Baker SK, Smith K, Atherton PJ, Phillips SM. Two weeks of reduced activity decreases leg lean mass and induces "anabolic resistance" of myofibrillar protein synthesis in healthy elderly. J Clin Endocrinol Metab. 2013 Jun;98(6):2604-12. doi: 10.1210/jc.2013-1502. Epub 2013 Apr 15.
- Devries MC, Breen L, Von Allmen M, MacDonald MJ, Moore DR, Offord EA, Horcajada MN, Breuille D, Phillips SM. Low-load resistance training during step-reduction attenuates declines in muscle mass and strength and enhances anabolic sensitivity in older men. Physiol Rep. 2015 Aug;3(8):e12493. doi: 10.14814/phy2.12493.
- McGlory C, von Allmen MT, Stokes T, Morton RW, Hector AJ, Lago BA, Raphenya AR, Smith BK, McArthur AG, Steinberg GR, Baker SK, Phillips SM. Failed Recovery of Glycemic Control and Myofibrillar Protein Synthesis With 2 wk of Physical Inactivity in Overweight, Prediabetic Older Adults. J Gerontol A Biol Sci Med Sci. 2018 Jul 9;73(8):1070-1077. doi: 10.1093/gerona/glx203.
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2015年9月1日
初级完成 (实际的)
2016年5月1日
研究完成 (实际的)
2016年5月1日
研究注册日期
首次提交
2017年1月13日
首先提交符合 QC 标准的
2017年1月31日
首次发布 (估计)
2017年2月1日
研究记录更新
最后更新发布 (估计)
2017年2月1日
上次提交的符合 QC 标准的更新
2017年1月31日
最后验证
2017年1月1日
更多信息
与本研究相关的术语
其他研究编号
- 0574
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.