Alterations in Spiking Kinematic, Muscle Activation, and Subacromial Structures Following Muscle Fatigue in Volleyball Players
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 35
- 试验地点
- 1
- 主要终点
- Degree of the glenohumeral and scapulothoracic joint during spiking
研究概览
简要总结
This study aims (1)to investigate the effects of repetitive functional overhead movements targeting shoulder and scapular muscles on glenohumeral and scapular kinematics and muscle activation during the arm cocking and acceleration of spiking, and changes in subacromial structures in healthy recreational volleyball players; (2) to compare these fatigue-related changes between athletes with good and poor shoulder motor control.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Between 18 and 35 years old
- •At least 2 consecutive years of volleyball experience
- •Involved in volleyball practice or game for at least 4 hours per week
- •Able to perform a cross-body spike with 3-step
排除标准
- •A history of major shoulder or spinal injury or surgery
- •Experiencing shoulder pain (VAS ≥ 3/10) in the last 6 months
结局指标
主要结局
Degree of the glenohumeral and scapulothoracic joint during spiking
时间窗: Baseline, immediately post-intervention (Day 1)
The kinematics is assessed using an electromagnetic motion tracking system (VIPERTM, Polhemus, USA) to measure the glenohumeral elevation, horizontal abduction/adduction, internal/external rotation, and scapulothoracic retraction/protraction, upward/downward rotation, anterior/posterior tilt during spiking movement. During the test, participants performed 3 times of cross-body spikes, with 15 seconds of rest between each trial. Data were collected at the end of the arm cocking (maximal shoulder horizontal abduction) and at ball-contact (maximal footswitch signal), and reported as mean values for each trial. (unit of measure: degree, °)
Activation amplitude of the glenohumeral and periscapular muscles
时间窗: Baseline, immediately post-intervention (Day 1)
The muscle activation amplitude of the serratus anterior, upper trapezius, lower trapezius, middle deltoid, infraspinatus, and pectoralis major during spiking movement. During the test, participants performed 3 times of cross-body spikes, with 15 seconds of rest between each trial. Data were collected in the arm cocking phase (from minimal shoulder elevation to the shoulder maximal horizontal abduction) and the acceleration phase (from maximal shoulder horizontal abduction to the ball-contact), and reported as mean values for each trial. (unit of measure: percentage, %)
Mean power frequency of the glenohumeral and periscapular muscles
时间窗: Baseline, immediately post-intervention (Day 1)
The mean power frequency of the serratus anterior, upper trapezius, lower trapezius, middle deltoid, infraspinatus, and pectoralis major during spiking movement. During the test, participants performed 3 times of cross-body spikes, with 15 seconds of rest between each trial. Data were collected in the arm cocking phase (from minimal shoulder elevation to the shoulder maximal horizontal abduction) and the acceleration phase (from maximal shoulder horizontal abduction to the ball-contact), and reported as mean values for each trial. (unit of measure: hertz, Hz)
次要结局
- Acromio-humeral distance and thickness of supraspinatus tendon thickness during arm elevation(Baseline, immediately post-intervention (Day 1))
- Degree of shoulder elevation at greater tuberosity-acromion alignment during arm elevation(Baseline, immediately post-intervention (Day 1))