Hip Thrust and Back Squat Training Elicit Similar Gluteus Muscle Hypertrophy and Transfer Similarly to the Deadlift
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 39
- 试验地点
- 1
- 主要终点
- Hypertrophy
研究概览
简要总结
This study compared the effects of two lower-body resistance training exercises - the barbell back squat and the barbell hip thrust - on muscle growth and strength in untrained young adults. Thirty-four participants were randomly assigned to train using either the back squat or the hip thrust, two times per week for nine weeks. Muscle size (via MRI) and strength (via weightlifting tests) were measured before and after training to determine whether one exercise produced greater improvements than the other, particularly in the gluteal muscles. Muscle activity during the first training session was also measured using surface electromyography (sEMG) to see whether early muscle activation could predict later muscle growth.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
盲法说明
Participants were not blinded to group allocation, as blinding was not feasible given the distinct nature of the two training exercises (back squat vs. barbell hip thrust). Investigators supervising training sessions were also not blinded, as they administered the assigned exercise protocol. During strength testing (3-repetition maximum and isometric wall push assessments), investigators were not blinded to group allocation due to logistical constraints, and the authors note that potential bias in this context cannot be fully ruled out. However, investigators were blinded to group allocation during MRI data collection and analysis; muscle cross-sectional area measurements were performed by a single investigator who did not have knowledge of participants' training group assignments.
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 18-30 years
- •Body mass index (BMI) less than 30 kg/m²
- •Minimal resistance training experience, defined as averaging ≤1 day per week of resistance training over the preceding 5 years
- •Willing and able to provide written informed consent.
排除标准
- •Participation in structured endurance training (e.g., running or cycling) more than 2 days per week over the past 6 months
- •Known overt cardiovascular or metabolic disease
- •Use of supplemental creatine and/or hormone-altering agents (e.g., testosterone boosters, growth hormone boosters) within the past 2 months
- •Any medical condition that would contraindicate participation in an exercise program
- •Any condition precluding MRI scanning (e.g., medically implanted devices)
研究组 & 干预措施
Hip thrust (HT)
Participants performed barbell hip thrust training only for 2 sessions per week for 9 weeks.
干预措施: Resistance training (Behavioral)
Back Squat (SQ)
Participants performed barbell back squat training only for 2 sessions per week for 9 weeks.
干预措施: Resistance training (Behavioral)
结局指标
主要结局
Hypertrophy
时间窗: Baseline and 9 weeks
Cross-sectional area of the upper, middle, and lower gluteus maximus was measured via magnetic resonance imaging (MRI) at baseline and following the 9-week training intervention. T1-weighted transverse images were obtained using a 3T MRI scanner, and muscle borders were manually traced using ImageJ software by a single investigator blinded to group allocation. Bilateral (left + right) mCSA values were summed at each of three standardized anatomical sites (upper, middle, and lower gluteus maximus) to assess site-specific hypertrophic response to training.
次要结局
- 3RM strength testing(Baseline and 9 weeks)
- One-bout EMG gluteal maximus recordings(Single training session within the first week of the intervention.)
研究者
Michael Roberts
Professor
Auburn University