The Perceived Point of Moderate Muscular Discomfort vs the Point of Technical Failure in the Ageing Population- a Pilot Study.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 16
- 试验地点
- 1
- 主要终点
- The number of reps between reported perceived moderate muscular discomfort and technical failure.
研究概览
简要总结
This is an investigation into the differences in muscle activation and numerical difference in reps between the feeling of moderate discomfort and technical failure during a set of bodyweight resistance exercise.
The investigators know that resistance training is an essential tool for older people to maintain muscle function, valuable independence and autonomy in daily tasks. The idea of completing a set of resistance training activity to the point of failing a repetition due to fatigue regularly has been shown to not be appealing and could be a reason why there are low participation rates among older people for in weight training regularly.
Research has also shown that it is not necessary to train to failure (being unable to continue to complete repetitions of an exercise with the proper technique due to fatigue), but the investigators would like to know if training to a point of moderate discomfort can also allow for the muscles to gain the positive changes associated with weight training, potentially making it more accessible and enjoyable.
Using bodyweight exercises (a squat pattern and a push up pattern) the investigators will see how many repetitions after the point of perceived moderate discomfort is stated at which the point of failure is. the investigators will also measure muscle activation in the quadriceps and triceps with EMG (a device that can detect the muscles' electrical activity/ how hard it is working) to see at which point the muscle is working the hardest.
详细描述
Before participation, the participant will undergo a health screening that follows the standard operating procedures of the Human Performance Laboratory. This involves measurements of height, weight, body fat percentage, blood glucose, blood pressure and heart rhythm abnormalities. Blood glucose will be measured using capillary blood via a finger prick test administered by the principal investigator. A very small amount of blood will be drawn into a capillary tube and then analysed in a machine (Biosen) to quantify the levels of blood glucose/sugar in the sample. Heart abnormalities will be measured using a device that is non-invasive and just requires the participant to place their fingers on a pad for one minute. The body fat percentage te69st is also non-invasive, requiring the participants to stand on a scale (Tanita body scanner) with their shoes and socks off.
EMG electrodes will then be placed on the triceps and quadriceps after standard skin preparation has taken place. After this the participant will complete a standardised isometric maximal voluntary contraction so the EMG activity can be standardised as % maximal voluntary contraction (%MVC). The details of the MVC protocol can be found in Appendix 2.
First the participant will be led through a standardized warm up that includes the use of elastic band exercises and joint mobility work for five minutes as seen in Appendix 3.
The participant will be shown the technique of three variations of the two exercises using a mobile phone app video; beginner, intermediate and advanced variations. They will then be asked to choose which version of the exercise they think can achieve 8-15 repetitions with.
All participants will then start with the beginner variation of the squat pattern exercise. If they are able to perform each exercise for more than 20 repetitions to technical failure they will be asked to perform the intermediate variation intermediate. If they are able to perform more than 20 repetitions to technical failure they will be asked to perform the advanced version.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 60 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Aged 60-80 years of age.
- •Physically capable of resistance training.
- •Able to walk unassisted.
排除标准
- •Major cardiovascular (e.g. myocardial infarction, angioplasty within the last year, coronary artery bypass graft), neurological (e.g. Parkinson's disease, Alzheimer's, major anxiety or depressive disorders), muscular (e.g., muscular dystrophies, myopathies, myositis) or uncontrolled metabolic conditions (e.g. Type 1 or 2 diabetes).
- •Severe obesity (BMI >39).
- •Have undertaken regular resistance exercise in the last 12 months.
- •Any upper or lower body musculoskeletal injury that impairs the participants ability to perform a repetition as fast as possible.
- •Acute or terminal illnesses (e.g. severe locals or systemic infections, cancer).
- •Current residence being within a setting of care.
- •Experience of muscle pain from taking statins.
研究组 & 干预措施
Bodyweight push-up and squat variations
The participant will select a variation of the push-up and squat. This will either be beginner, intermediate or advanced. Muscle activity in the triceps and quadriceps muscle groups will be measured for the push-up and squat patterns respectively.
干预措施: Resistance Exercise Protocol (Other)
结局指标
主要结局
The number of reps between reported perceived moderate muscular discomfort and technical failure.
时间窗: During 1 set of body weight resistance exercise.
The quantitative difference between the rep number that the participant reports the feeling of moderate muscular discomfort at (5 on a scale of 1-10) compared to the rep number that technical failure of the set occurs.
次要结局
- Muscle Activity(During intervention)
- Accuracy of exercise difficulty selection(Immediately after intervention)
研究者
Matthew Davitt
PhD Student
Lancaster University