Investigation of the Effects of Gastrocnemius Muscle Fatigue on Muscle Elastic Properties and Jump Performance
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 28
- 试验地点
- 1
- 主要终点
- Muscle Stiffness of the Medial and Lateral Gastrocnemius
研究概览
简要总结
This study investigates the acute and 24-hour recovery effects of localized muscle fatigue on the viscoelastic properties of the medial gastrocnemius (MG) muscle and vertical jump performance. The research aims to quantify the changes in muscle stiffness, tone, and elasticity immediately after a standardized fatigue protocol and to monitor the recovery of these parameters 24 hours later. Additionally, the study evaluates the impact of fatigue on explosive power, measured by countermovement jump (CMJ) height, across these time points.
详细描述
Participants undergo a structured experimental procedure to evaluate the changes across three time points:
Baseline Assessment: Passive muscle tone (Hz), stiffness (N/m), and elasticity (logarithmic decrement) of the medial gastrocnemius (MG) are measured using the MyotonPRO device. Initial vertical jump height is determined through countermovement jump (CMJ) tests.
Fatigue Protocol & Acute Assessment: Participants perform standardized standing calf raises until task failure. Immediately following the protocol, MG myotonometric properties and CMJ performance are re-measured to determine the acute fatigue-induced changes.
24-Hour Follow-up: Participants return to the laboratory exactly 24 hours later. All measurements (MyotonPRO and CMJ) are repeated to assess the return to baseline levels and the recovery status of the muscle-tendon unit.
The statistical analysis focuses on the differences between baseline, post-fatigue, and 24-hour recovery measurements.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Other
- 盲法
- None
盲法说明
Masking is not possible due to the nature of the physical fatigue protocol.
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy volunteers aged between 18 and
- •Physical activity level categorized as sedentary or recreationally active according to IPAQ.
- •Willingness to follow the supine isometric fatigue protocol and attend follow-up measurements.
- •Sedentary or recreationally active (IPAQ scores).
排除标准
- •History of lower extremity musculoskeletal injuries or surgeries within the last 6 months.
- •Any diagnosed neurological, metabolic, or cardiovascular diseases.
- •Regular use of medications or supplements that may affect muscle tone or recovery (e.g., muscle relaxants, high-dose antioxidants).
- •Recent history of intensive strength training for the lower limbs.
研究组 & 干预措施
Gastrocnemius Fatigue Group
Participants in this arm undergo a standardized localized muscle fatigue protocol for the plantar flexors. This involves performing repetitive standing calf raises at a constant tempo of 60 beats per minute until task failure. Muscle myotonometric properties (tone, stiffness, elasticity) and vertical jump performance (CMJ) are measured at baseline, immediately post-fatigue, and 24 hours later to evaluate acute changes and recovery.
干预措施: Isometric Plantar Flexion Fatigue Protocol (Device)
结局指标
主要结局
Muscle Stiffness of the Medial and Lateral Gastrocnemius
时间窗: Baseline, immediately post-fatigue (Post-0), and 24 hours post-fatigue (Post-24h)
Evaluation of the intrinsic mechanical stiffness of the medial (MG) and lateral (LG) gastrocnemius muscles using myotonometry. Higher values indicate greater stiffness. Measured in Newtons per meter (N/m).
次要结局
- Vertical Jump Performance (Jump Height)(Baseline, immediately post-fatigue (Post-0), and 24 hours post-fatigue (Post-24h))
- Countermovement Jump Phase Durations (Braking and Eccentric)(Baseline, immediately post-fatigue (Post-0), and 24 hours post-fatigue (Post-24h))
- Dynamic Balance Performance (Y-Balance Test)(Baseline, immediately post-fatigue (Post-0), and 24 hours post-fatigue (Post-24h))
研究者
Yasemin Şahbaz
Assistant Professor
University of Beykent