The Effect of Combining Maximal Mental Effort With Elastic Band Training on Strength and Neuromuscular Adaptations in Older Females
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 45
- 试验地点
- 2
- 主要终点
- Change in bicep curl strength as measured by load lifted in pounds
研究概览
简要总结
The goal of this clinical trial is to determine the effect of maximal mental effort combined with elastic band training on strength and neuromuscular function in healthy, older females. The main questions it aims to answer are:
- Does elastic band training in combination with maximal mental effort increase strength more than elastic band training alone?
- Does elastic band training in combination with maximal mental effort improve neuromuscular function more than elastic band training alone?
Participants will be randomly assigned to 1 of 3 groups:
- Elastic band training
- Elastic band training with maximal mental effort
- Control
Researchers will compare groups to determine differences in changes in strength, neuromuscular function, and body composition.
详细描述
Participants in both training groups will perform 6 weeks of moderate intensity, whole-body elastic band training. Participants in the control group will participate in all testing procedures but not perform any training. Participants from both groups will be instructed to maintain their normal physical activity levels and dietary habits.
All training sessions will be home-based and virtually supervised by research personnel. Participants will complete 2 training sessions in the first week and 3 training sessions per week for the remaining 5 weeks. Each training session will last about 45-60 minutes and consist of 7 exercises performed in the same order by each participant, including both multi-joint (chair squat, chest press, leg press, back row) and single-joint (knee extension, knee flexion, elbow flexion) exercises. Participants will perform 12 repetitions for each exercise for the first 3 weeks, then volume will be increased by progressing to 4 sets for the remaining 3 weeks. There will be a 60-second rest interval between sets and a similar tempo will be used between groups.
Both training groups will perform the same training protocol, but participants in the maximal mental effort group will mentally urge their muscles to contract maximally during each repetition. That is, despite using a moderate intensity, participants will imagine the feeling of maximal muscle contraction of the primary muscles during each repetition.
Several measures of strength, neuromuscular function, physical function, and body composition will be measured before and after the training or control period.
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 (Participant)
盲法说明
The mental effort aspect of the study will be concealed from subjects, so they will not be aware of any difference between training groups.
入排标准
- 年龄范围
- 65 Years 至 79 Years（Older Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Between 65-79 years of age
- •Have not engaged in structured exercise for 3 years
- •Are not reliant upon a walking aid
- •Be able to rise from a chair unassisted
- •BMI between 25-33 kg/m²
- •Have access to the internet and access to a smartphone or computer with a camera at home
排除标准
- •Any history of cardiovascular, cerebrovascular, or metabolic diseases
- •Musculoskeletal injury within the past 6 months
- •Any condition affecting muscle function
- •Uncontrolled hypertension
- •Score less than 23 on the Mini-mental State Exam
- •Upon starting study, missing more than 2 training session
结局指标
主要结局
Change in bicep curl strength as measured by load lifted in pounds
时间窗: Baseline, Week 7
Maximum dumbbell load lifted successfully throughout the range of motion of a bicep curl
次要结局
- Change in isometric bicep strength as measured by newton-meters of torque(Baseline, Week 7)
- Change in voluntary activation as measured by ratio of superimposed torque to resting twitch torque(Baseline, Week 7)
- Change in handgrip strength as measured in kilograms of force(Baseline, Week 7)
- Change in antagonist co-activation as measured by electromyography amplitude(Baseline, Week 7)
- Change in isokinetic bicep strength as measured by newton-meters of torque(Baseline, Week 7)
- Change in chair rise performance as measured by number of chair rises performed in 30 seconds(Baseline, Week 7)
- Change in resting heart rate as measured by beats/min using oscillatory cuff(Baseline, Week 7)
- Change in rate of torque development as measured by newton-meters per second(Baseline, Week 7)
- Change in agonist muscle activation as measured by electromyography amplitude(Baseline, Week 7)
- Change in walking speed as measured by time taken to walk 6 meters(Baseline, Week 7)
- Change from baseline in isokinetic muscle activation at 6 weeks(Baseline, Week 7)
- Change in muscle composition as measured by ultrasound-derived grey-scale analysis(Baseline, Week 7)
- Change in fat-free mass as measured by kilograms(Baseline, Week 7)
- Change in general feeling about knee extension and bicep curl exercise(Each exercise session of the 6-week intervention)
- Change in grip width on elastic band as measured by distance of hand placements on band(Baseline, 3 weeks, 5 weeks)
- Change in skeletal muscle size as measured by ultrasound-derived cross-sectional(Baseline, Week 7)
- Change in body fat percentage as measured by fat tissue relative to fat-free tissue(Baseline, Week 7)
- Change in chair rise power by watts by a linear transducer attached to hip during chair rise test(Baseline, Week 7)
- Change in fat mass as measured by kilograms(Baseline, Week 7)
- Change in hemoglobin A1c level as measured by blood drop analysis(Baseline, Week 7)
- Change in resting blood pressure in millimeters of mercury using oscillatory cuff(Baseline, Week 7)
研究者
Garrett Hester
Associate Professor of Exercise Science
Kennesaw State University