Assessing Adaptations in Biopsychosocial Factors and Muscle Morphology After a Resistance Exercise Intervention in Individuals With Low Back Pain
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 22
- 试验地点
- 1
- 主要终点
- Exercise Induced Hypoalgesia
研究概览
简要总结
The purpose of this study is to evaluate the longitudinal effects of a four-week dynamic resistance training program using the 45-degree Roman chair on pain sensitivity changes after exercise and lumbar muscle performance in individuals with chronic low back pain (LBP). This study will consist of three specific aims. Aim 1 examines changes in local exercise-induced hypoalgesia. Aim 2 will assess changes in lumbar multifidus and erector spinae thickness using ultrasound imaging before and after the intervention. Aim 3 will evaluate changes in lumbar extensor strength (handheld dynamometry (HHD)) and endurance (Biering-Sørensen test).
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
- None
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •chronic low back pain lasting ≥ 12 weeks
- •current pain intensity ≥ 3/10 but no higher than an 8/10 on the Numeric Pain Rating Scale (NPRS) within the past 48 hours
- •resistance trained (defined as 2x/week for the past 8-12 weeks)
- •able to read and speak English for informed consent and completion of questionnaires
- •willing and physically able to complete all testing and intervention sessions.
排除标准
- •History of spinal surgery, fusion, or fracture within the past 6 months
- •diagnosed degenerative disc disease, scoliosis, or spinal pathology that precludes safe exercise participation
- •use of an assistive device for walking (cane, walker) within the past year
- •pregnancy, due to contraindications for exercise testing and ultrasound -body weight ≥ 300 lbs., which exceeds the safe capacity of the Roman chair --
- •current tobacco/nicotine use
- •current enrollment in physical therapy or structured rehabilitation for LBP,
- •cardiovascular, pulmonary, metabolic, or systemic disease that increases risk during exercise
- •nociplastic pain conditions (e.g., fibromyalgia) or neurological conditions that confound EIH responses
- •inability to complete ≥ 8 Roman chair repetitions with proper form during screening
- •non-English speaking
研究组 & 干预措施
Intervention Group
During visits 2-13, participants will attend 2-3 sessions per week, with a minimum of 48 hours between visits, and must complete all study visits 6 weeks after enrollment. Participants in the intervention group will perform 3 sets of low back extension exercise on the Roman chair until volitional exhaustion. The three sets will be performed to volitional exhaustion or 20 repetitions, whichever comes first. If more than 20 repetitions can be completed after a set the investigator will add resistance according to the NSCA's guidelines (2.5-10% increase).
干预措施: 45-Degree Roman Chair Exercise (Other)
Control Group
Participants in the control group will not complete the low back extension exercise and will be told to continue activity as usual. All participants will complete a training log and detail the type of resistance exercise performed, the number of sets and repetitions completed, and the weight used.
结局指标
主要结局
Exercise Induced Hypoalgesia
时间窗: Weeks 1 and 4
Participants will perform one set of back extension exercise on a 45-degree Roman chair until volitional exhaustion. Pressure Pain Threshold applied over the low back will be examined before and after exercise.
Muscle Thickness
时间窗: Weeks 1 and 4
Ultrasound imaging to assess muscle thickness of the erector spinae and the multifidus muscles will be completed.
Muscle Strength
时间窗: Weeks 1 and 4
Back extensor strength will be assessed using maximal voluntary isometric contraction of the back extensor muscles using a handheld dynamometer.
Muscle Endurance
时间窗: Weeks 1 and 4
The Biering-Sorensen test will be performed in which participants lie prone on a treatment table with the lower body secured to the table. Participants will be instructed to cross their arms over their chest and maintain their torso in a horizontal position with the upper body unsupported, parallel to the floor.
次要结局
未报告次要终点
研究者
Abigail Wilson
Assistant Professor
University of Central Florida