Sympathetic Activation and Strength Gains Rise Together Under Resistance Training But Uncouple Under Concurrent Training: An 8-Week Randomized Controlled Trial in Untrained Men
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 30
- 试验地点
- 1
- 主要终点
- skin sympathetic nerve activity (aSKNA)
研究概览
简要总结
This study examines how the body's stress (sympathetic) nervous system responds to 8 weeks of either strength training alone or strength training combined with endurance (treadmill running) training in previously untrained young men. Skin sympathetic nerve activity, a noninvasive marker of sympathetic nervous system activity, is measured before and after training, along with muscle strength, jumping ability, and heart rate variability. The study investigates whether changes in sympathetic nervous system activity are associated with changes in strength and jumping ability, and whether this relationship differs between men who perform strength training alone versus those who combine strength and endurance training.
详细描述
This study examined how the body's stress (sympathetic) nervous system responds to 8 weeks of either strength training alone or strength training combined with endurance (treadmill running) training in previously untrained young men. Skin sympathetic nerve activity, a noninvasive marker of sympathetic nervous system activity, was measured before and after training, along with muscle strength, jumping ability, and heart rate variability. The study found that in men who did strength training only, those whose sympathetic nervous system activity increased the most also gained the most strength and jumping ability. This relationship was not seen, and in some cases reversed, in men who combined strength training with endurance training. The findings suggest that adding endurance exercise changes how the nervous system adapts to a strength training program, alongside the well-documented reduction in strength gains seen with combined training (the "interference effect").
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Care Provider)
盲法说明
Participants and trainers could not be blinded to group allocation given the nature of the exercise interventions. All autonomic, neuromuscular and reflex outcome data were acquired, processed and statistically analyzed by investigators blinded to group allocation, using coded, de-identified records until analyses were complete.
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Healthy young men
- •No hypertension or cardiovascular/vascular disease
- •No migraine or neurodegenerative disease
- •No smoking or alcohol use
- •No prior structured exercise training
- •No musculoskeletal injury
- •Willing to abstain from caffeine, alcohol, and strenuous exercise for 24 hours before testing
排除标准
- •Hypertension or cardiovascular/vascular disease
- •Migraine or neurodegenerative disease
- •Current smoking or alcohol use
- •Prior structured exercise training history
- •Musculoskeletal injury precluding resistance or endurance exercise
结局指标
主要结局
skin sympathetic nerve activity (aSKNA)
时间窗: Baseline and 8 weeks
Average rectified voltage of skin sympathetic nerve activity recorded noninvasively via the neuECG method.
Change in one-repetition maximum (1RM) back squat
时间窗: Baseline and 8 weeks
Change in countermovement jump (CMJ) height
时间窗: Baseline and 8 weeks
次要结局
- Change in SKNA burst total area(Baseline and 8 weeks)
- Change in CMJ peak force(Baseline and 8 weeks)
- Change in CMJ peak velocity(Baseline and 8 weeks)
- Change in CMJ peak power(Baseline and 8 weeks)
- Change in SKNA burst duration(Baseline and 8 weeks)
- Change in SKNA burst amplitude(Baseline and 8 weeks)