Counteracting Age-related Loss of Skeletal Muscle Mass
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 66
- 试验地点
- 2
- 主要终点
- Muscle protein synthesis rate response to protein intake from basal overnight fasted state.
研究概览
简要总结
Up to 66 healthy elderly individuals (at least 65 years old) are recruited as subjects. They will be recruited as a subgroup to protocol ID: H-4-2013-070.
Upon inclusion, each individual will be randomized into one of the five groups stratified according to gender (M/F) and 30s chair stand (<16 OR ≥16). The five groups are: Heavy Resistance Training (N=12), Light Intensity Training (N=12), Protein Whey (N=15), Protein Collagen (N=15) and Carbohydrate (N=12). The individuals randomized into one of the supplementation groups (Protein Whey, Protein Collagen or Carbohydrate) will be blinded to the supplement content.
Assessments will be performed at Baseline (before intervention start) and after 12 months of intervention.
The primary outcomes are measures of muscle protein synthesis rate measured as the fractional synthesis rate from Baseline to 12 months of intervention.
The hypotheses are i) that basal and protein-stimulated muscle protein synthesis rates are elevated in the exercise training groups after 12 months of intervention. ii) prolonged intake of protein of different quality will improve the muscle protein synthetic response to protein intake after 12 months of intervention.
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
- Double (Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 65 Years 至 —（Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy, independently living
- •Age at least 65 years
排除标准
- •Subjects dependent on help/nursing etc.
- •Chronic medical diseases: diabetes mellitus, clinical knee or hip osteoarthritis, other types of arthritis or connective tissue disorders, active cancer, renal diseases, severe chronic obstructive pulmonary disease, cardiac arrhythmias or known decreased left ventricular ejection fraction, lactose or gluten intolerance, chronic inflammatory bowel diseases, non-treated hyper/hypothyroidism, dementia
- •Surgical diseases: Bone, muscle, tendon or joint injuries compromising participation in exercise regimens
- •Implanted magnetic devices incompatible with MRi-scanning
- •Weekly alcohol consumption > 21 units (1 unit equals 4 g of ethanol) for men and > 14 for women
- •Medicine except acetylsalicylic acid, paracetamol, thyroid function hormones, statins in doses above 40 mg/day or if combined with subjective myalgia, ACE-inhibitors, angiotensin II blockers, beta-blockers, calciumantagonists, proton-pump inhibitors, thiazides, potassium-sparring diuretics and loop diuretics
- •1 hour of exercise weekly, except light activities such as stretching/gymnastics and bike-riding/walking as transportation
结局指标
主要结局
Muscle protein synthesis rate response to protein intake from basal overnight fasted state.
时间窗: Baseline and 12 months
Change in the response of muscle protein synthesis rate to a single intake of 20 g whey protein and 10 g carbohydrate from the basal overnight fasted state from Baseline to 12 months intervention. Statistical analysis: Outcome 1 will be subtracted outcome 2 to calculate the difference FSR at baseline and 12 month respectively. The difference at baseline will be subtracted the difference at 12 month to calculate the delta difference. This delta difference will be analyzed as a modified intention-to-treat as well as per protocol, and we will test the following groups against each other using one-way analysis of variance of the relative group changes from baseline to 12 months: (1) WHEY vs. COLL vs. CARB and (2) HRTW vs. LITW vs. WHEY
Basal overnight fasted muscle protein synthesis rate.
时间窗: Baseline and 12 months
Overnight fasting muscle protein synthesis will be measured at Baseline and after 12 months intervention by applying stable isotope amino acid tracer techniques and calculating the fractional synthesis rates.
次要结局
- Muscle protein turnover molecular signaling and gene expression(Baseline and 12 months)