Acute Responses to High-intensity Interval Exercise (HIIE) and Blood Flow Restriction (BFR)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Blood lactate concentration
研究概览
简要总结
The study aims to look at the blood flow restriction (BFR) + high intensity interval training (HIIT) variables to induce an optimal acute training stimulus (i.e., acute responses in main outcome measures of muscular activation, muscular deoxygenation, and secondary outcome measures of heart rate (HR), blood lactate (bLa), subjective ratings of perceived exertion and discomfort)
The hypotheses for this study are: (i) BFR increases muscular deoxygenation, muscular activation when HIIT exercise is of the same intensity, (ii) however, comparing between a lower BFR + HIIT exercise intensity (e.g. 80% V̇O2max) and higher HIIT exercise intensity (e.g. 100% V̇O2max), muscular deoxygenation and activation will be similar but HR will be lower in the BFR + HIIT condition.
详细描述
This study revolves around the optimisation of blood flow restriction (BFR) and high-intensity interval training (HIIT) protocols for the racket sport athlete. The study aims to look at the BFR + HIIT variables to induce an optimal acute training stimulus. This can be achieved with the consideration of two main research questions: (i) What is the ideal combination of BFR cuff pressure and exercise intensity (i.e. cycling) to elicit favourable training stimuli, i.e., acute responses in main outcome measures of muscular activation, muscular deoxygenation, and secondary outcome measures of heart rate (HR), blood lactate (bLa), subjective ratings of perceived exertion and discomfort?; (ii) How does BFR + HIIT compare with traditional HIIT at a similar or higher exercise intensity in terms of these acute responses?
The hypotheses for this study are: (i) BFR increases muscular deoxygenation, muscular activation when HIIT exercise is of the same intensity, (ii) however, comparing between a lower BFR + HIIT exercise intensity (e.g. 80% V̇O2max) and higher HIIT exercise intensity (e.g. 100% V̇O2max), muscular deoxygenation and activation will be similar but HR will be lower in the BFR + HIIT condition.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Age: 18-40 years
- •Competed in competitive varsity sports (endurance, tennis, badminton, squash, football, basketball, etc.) at the varsity/club level
- •Actively training for at least 2 sessions (1 - 1.5h) per week
- •Healthy (free from illnesses) and no musculoskeletal injuries for the past 6 months
- •No history of cardiometabolic, vascular diseases or similar conditions (high blood pressure, peripheral vascular diseases, heart diseases, metabolic syndrome, diabetes, stroke, etc.).
- •Pass pre-participation health screening tests - Physical Activity Readiness Questionnaire for Everyone (PAR-Q+) and Australian Institute of Sport (AIS) Blood Flow Restriction (BFR) pre-screening questionnaire (no history of any risk factors).
- •Maximal oxygen uptake (VO2max) of ≥40mmol/min/kg during a maximal aerobic cycling test.
- •Non-smoker
- •Drink alcohol less than 3 times each week and less than 3 drinks each time
排除标准
- •Any diagnosed form of cardiometabolic disease (CVD, diabetes, metabolic syndrome, hypertension)
- •Any symptoms contraindication of exercise testing (eg chest pains)
- •Any balance or dizziness problems
- •Any chronic medical conditions (whether medicated or not)
- •Any bone joint problems
- •Any Physician diagnosed contraindications to exercise
研究组 & 干预措施
HIIT Control
High intensity interval cycling
干预措施: Active Comparator: HIIT Control (Other)
HIIT + BFR between cycling sets
High intensity interval cycling with blood flow restriction applied between sets of cycling
干预措施: Experimental: HIIT + BFR between cycling sets (Other)
HIIT + BFR moderate occlusion during cycling
High intensity interval cycling with moderate blood flow restriction applied during cycling
干预措施: Experimental: HIIT + BFR moderate occlusion during cycling (Other)
HIIT + BFR high occlusion during cycling
High intensity interval cycling with high blood flow restriction applied during cycling
干预措施: Experimental: HIIT + BFR high occlusion during cycling (Other)
结局指标
主要结局
Blood lactate concentration
时间窗: Measured and compared between each acute arm (condition)
Fingertip capillary measure
Muscle oxygenation
时间窗: Measured and compared between each acute arm (condition)
Near infra-red spectroscopy to examine regional tissue (the vastus lateralis muscle) oxygenation i.e, the percentage of haemoglobin and deoxyhaemoglobin (physiological parameter)
Heart rate
时间窗: Measured and compared between each acute arm (condition)
Heart rate using short-range telemetry
Muscle activation
时间窗: Measured and compared between each acute arm (condition)
Surface electromyography of the vastus lateralis and biceps femoris muscles to determine electrical activity of the motor units (physiological parameter)
次要结局
- Rating of perceived exertion(Measured and compared between each acute arm (condition))
- Exertion and Pain scale(Measured and compared between each acute arm (condition))
研究者
Stephen Burns
Associate Professor
Nanyang Technological University