Specific Neurotechnical Strength Training: Randomized Controlled Trial (NeuroTraining)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 34
- 试验地点
- 1
- 主要终点
- Change from Baseline Mean Discharge Rate of Brachialis Biceps Motor Units at 4 weeks
研究概览
简要总结
This study aims to apply a novel study methodology using high density electromyography (HDEMG) to know what are the mechanisms underlying the structural and functional changes obtained by two different training methods, commonly used, facilitating their understanding, study and subsequent application according to specific needs.
详细描述
Different training methodologies have previously shown similar results in the improvement of structural or functional characteristics such as hypertrophy or strength. However, the different nature of their methods has suggested for years the possibility that different neuromuscular mechanisms could be behind these observed characteristics.
The development of a new technology, such as high-density electromyography (HDEMG), capable of studying new properties previously hidden from assessment methods, such as the speed of nerve impulse propagation or the frequency of motor unit discharge, has allowed a more thorough study of the mechanisms.
This study aims to apply this new study methodology to know what are the mechanisms underlying the changes at the structural and functional level obtained by two different training methods, commonly used, facilitating their understanding, study and subsequent application according to specific needs.
For this reason, the main hypothesis is the generation of different neuromuscular mechanisms and adaptations by executing, for 4 weeks, two different training methodologies, obtaining a dissociation between the results obtained at the structural level (hypertrophy), functional (generation of strength) and HDEMG analysis of the central and peripheral characteristics of the neuromuscular system in each of the programs studied.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Outcomes Assessor)
盲法说明
The assessor will not be aware of the group to which each subject has been assigned.
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
- •18-35 years
排除标准
- •physical exercise that involves work of upper limbs during the time of the intervention
- •upper limb injury during the previous 12 months
- •systemic diseases
研究组 & 干预措施
Speed Loss 20% Group
The SL20% group will carry out a program based on the limitation of the speed loss, allowing to perform the exercise only until a speed loss of 20% is achieved, following a similar methodology previously published (Pareja-Blanco et al., 2017). The program will consist of a job for 4 weeks, with a frequency of 2 sessions a week. In each session, a 6-series routine with an open number of repetitions will be carried out twice, allowing as many repetitions as possible to perform until a 20% loss of execution speed is reached. The intensity of work will be 70% 1RM, resting 4 minutes between sets. As an only exercise, an elbow flexion (bicep curl) with dumbbell will be performed.
干预措施: Speed Loss 20% Strength Training (Other)
Reduced Rest Time Group
The RRT group will carry out a program based on the reduction of rest time between series, following a previously published methodology (Stragier et al., 2019). The program will consist of a job for 4 weeks, with a frequency of 2 sessions a week. In each session, a 5 series routine with progressive repetition volume (3 to 7) at 70% 1RM will be performed twice, resting 15 seconds between sets and 150 seconds between each of the 2 blocks. The exercise to be performed will be an elbow flexion (bicep curl) with dumbbell.
干预措施: Reduced Rest Time Strength Training (Other)
结局指标
主要结局
Change from Baseline Mean Discharge Rate of Brachialis Biceps Motor Units at 4 weeks
时间窗: Baseline and post-intervention (4 weeks after baseline)
The mean discharge rate of the Brachialis Biceps motor units will be evaluated using a high density electromyography device (HDEMG). For this, the signal produced during isometric contractions at different submaximal force levels (10, 30, 50, and 70%) will be recorded, using an external analog to digital signal converter Sessantaquattro (64-channel EMG amplifier; OT Bioelettronica, Turin, Italy).
次要结局
- Arm circumference(Baseline and post-intervention (4 weeks after baseline))
- Speed of propagation of Brachialis Biceps Motor Units(Baseline and post-intervention (4 weeks after baseline))
- Isometric force of Brachialis Biceps using s-beam load cell(Baseline and post-intervention (4 weeks after baseline))
- Isometric force of Brachialis Biceps using hand dynamometer(Baseline and post-intervention (4 weeks after baseline))
- Muscle thickness (thickness) of the brachial biceps using ultrasound(Baseline and post-intervention (4 weeks after baseline))
研究者
Dr. Antonio I Cuesta-Vargas
Director, Clinical Research
University of Malaga