An interventional study of 45-Degree Roman Chair Exercise in Low Back Pain, Chronic, sponsored by University of Central Florida. Completed at 1 site in United States. Open to participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2026-04-14.
Sponsored by University of Central Florida · Not applicable, Interventional, and Treatment
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).
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Exclusion Criteria:
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).
Other: 45-Degree Roman Chair Exercise
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.
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).
Exercise Induced Hypoalgesia
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.
Time frame: Weeks 1 and 4
Muscle Thickness
Ultrasound imaging to assess muscle thickness of the erector spinae and the multifidus muscles will be completed.
Time frame: Weeks 1 and 4
Muscle Strength
Back extensor strength will be assessed using maximal voluntary isometric contraction of the back extensor muscles using a handheld dynamometer.
Time frame: Weeks 1 and 4
Muscle Endurance
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.
Time frame: Weeks 1 and 4
Plan to share: No
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This study is completed, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.
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University of Central Florida