Effects of Five Days of Physical Inactivity on Endothelial Function in Healthy Humans
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 8
- 试验地点
- 2
- 主要终点
- Change from baseline of flow-mediated vasodilatation (FMD) of the brachial artery
研究概览
简要总结
Physical inactivity is a significant predictor of major non-communicable diseases such as type 2 diabetes (7%), cardiovascular disease (6%), musculoskeletal disorders and some types of cancer, and has been proposed to be the 4th leading cause of death worldwide. The investigators aim is to assess the vascular (endothelial) function before and after a 5-day period of reduced activity of upper and lower limbs via an arm sling and daily step counts reduction, respectively, in healthy participants. Twelve young (ages of 18 - 35 years), healthy, males and females, recreationally active with a body mass index between 18 and 27 kg/m2 will be recruited. The participants will then randomly undergo two 5-day interventions: (A) 5 consecutive days of habitual daily levels of physical activity and matched food intake (Control trial). (B) 5 consecutive days of reduced step count by 80% compared to the Control trial combined with their non-dominant arm placed in a sling and a reduction in food (energy) intake (~20%) to match the reduction in energy expenditure induced by inactivity (Inactivity trial). On days 1 and 6 of each experimental trial, the endothelial function of the brachial and popliteal arteries, and hand grip strength will be measured.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Non-smoking
- •Age (18-35 years old)
- •Body mass index (BMI) of 18-27 kg/m2
- •Recreationally active
- •Ability to give informed consent
排除标准
- •Any metabolic (e.g. diabetes), endocrine (e.g. hyperthyroidism) or cardiovascular (e.g. heart or blood) abnormalities including hypertension or heart failure
- •Clinically significant abnormalities on screening including ECG abnormalities
- •Taking routine medication that may alter cardiovascular function and blood flow (e.g. blood pressure-lowering drugs or drugs that cause hypertension)
- •Well-trained individuals
- •On an energy-restricted diet or seeking to lose weight
- •High alcohol consumption (<3-4 units/day)
结局指标
主要结局
Change from baseline of flow-mediated vasodilatation (FMD) of the brachial artery
时间窗: Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
The FMD of the brachial artery will be measured using an ultrasound collected at baseline and continuously for 80 seconds post-arm occlusion for 5 minutes
Change from baseline of flow-mediated vasodilatation (FMD) of the popliteal artery
时间窗: Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
The FMD of the popliteal artery will be measured using an ultrasound collected at baseline and continuously for 80 seconds post-arm occlusion for 5 minutes
次要结局
- Hand grip strength(3 minutes)
研究者
Moira Taylor
Dr Moira A Taylor
University of Nottingham