Comparison Between Eccentric Hamstring Strength Training and Sprint-Specific Training on Muscle Hypertrophy, Strength, Power, and Sprint Performance in Club Sport Collegiate Athletes
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 90
- 试验地点
- 1
- 主要终点
- Change in muscle volume
研究概览
简要总结
The purpose of this study is to compare the effects of an intensity-, volume-, and time under tension-matched eccentric hamstring exercise intervention with the Romanian deadlift (RDL) and the Nordic hamstring exercise (NHE) to a sprint-specific training program on hamstring muscle architecture, volume, sprint performance, strength, and power.
Participants will be assigned to complete one of the 3 hamstring interventions for 10 weeks.
详细描述
Prior to the intervention, participants will undergo baseline testing which will include a) ultrasound imaging of the hamstrings muscles for measures of biceps femoris long head fascicle length, pennation angle, muscle thickness, anatomical cross-sectional area, and muscle volume b) passive and active ranges of motion, c) 3 repetition maximum (3RM) RDL strength, d) peak NHE force, e) countermovement jump height, f) broad jump distance, g) Pro Agility change of direction, and h) a 60 m sprint with sprint kinematics assessed via inertial measurement units.
Participants will be randomly assigned to either the RDL, NHE, or sprint training group. After randomization, each participant will undergo the intervention program based upon their group allocation.
Performance testing and imaging will be repeated mid-intervention, following the intervention, and after 2 weeks of deloading.
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
- Double (Investigator, Outcomes Assessor)
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
- •Age 18-25 years
- •Actively participating in a club team
- •>6 months experience with resistance training
- •Minimum of 1 year experience at the high school level in organized team sport
- •No history of hamstring injury within the last 6 months
- •No history of major lower extremity surgery (including back)
- •No acute musculoskeletal injury to the lower extremity
- •Not currently pregnant
排除标准
- •Unable to refrain from resistance training outside the study
- •Unable to make at least 80% of the training sessions
- •Hamstring injury in the last 6 months
- •History of major lower extremity surgery (including back)
- •Acute musculoskeletal injury to the lower extremity
- •Currently pregnant
研究组 & 干预措施
Romanian dead lift (RDL) group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The RDL arm will perform RDL.
干预措施: RDL (Other)
Nordic hamstring exercise (NHE) group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The NHE arm will performed NHE
干预措施: NHE (Other)
Sprint group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise. The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training. The sprint training program will be performed twice per week with the first day of training focused on shorter distances to focus on acceleration and the second training day focused on maximal velocity. The relative efforts and distances for each training day will mimic a similar prescription to that of the resistance training program.
干预措施: Sprint testing (Other)
结局指标
主要结局
Change in muscle volume
时间窗: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
Change in pennation angle (PA)
时间窗: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
Change in fascicle length (FL)
时间窗: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
Change in muscle cross-sectional area (CSA)
时间窗: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
次要结局
- Change in hip flexion(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in anterior pelvic tilt(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in eccentric strength(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in inertial measurement units (IMU)-based sprinting biomechanics(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in countermovement jump (CMJ) performance(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in standing broad jump (SBJ) performance(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in change of direction (CoD) performance(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))
- Change in range of motion (ROM) performance(Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks))