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Clinical Trials/NCT07337213
NCT07337213Not yet recruitingNot Applicable

Knee Extensor-Focused Biomechanical Intervention for Pain, Posture, and Disability in Non-Specific Low Back Pain: A Randomized Controlled Trial

Lincoln University College0 sites128 target enrollmentStarted: February 1, 2026Last updated:
Interventions

Trial Snapshot

Phase
Not Applicable
Status
Not yet recruiting
Enrollment
128
Primary Endpoint
Mean change in the Lumbar lordosis Cobb angle in degrees measured by X-ray

Study Overview

Brief Summary

The goal of this clinical trial is to learn if knee extensor training with different protocols works to treat LBP in adults.. The main questions it aims to answer are:

What are the comparative effects of open and closed kinetic chain knee extensor strengthening exercises versus lumbar stabilization exercises on lumbar curvature, postural control, and disability in individuals with non-specific low back pain? 1.4.2. How does open kinetic chain knee extensor strengthening affect pain, functional capacity, and lumbar spine stability compared to closed kinetic chain exercises in individuals with non-specific low back pain? 1.4.3 What is the effect of open kinetic chain knee extensor strengthening on pain, functional capacity, and lumbar spine stability compared to conventional lumbar muscle exercises in individuals with non-specific low back pain? 1.4.4 What is the effect of closed kinetic chain knee extensor strengthening on pain, functional capacity, and lumbar spine stability compared to conventional lumbar muscle exercises in individuals with non-specific low back pain? 1.4.5 What is the effect of open kinetic chain knee extensor strengthening on pain, functional capacity, and lumbar spine stability in individuals with non-specific low back pain? 1.4.6 What is the effect of close kinetic chain knee extensor strengthening on pain, functional capacity, and lumbar spine stability in individuals with non-specific low back pain? 1.4.7 What is the effect of conventional lumbar extensor strengthening on pain, functional capacity, and lumbar spine stability in individuals with non-specific low back pain Researchers will compare three different exercise protocols to a control group (will not receive exercise) to see if knee extensor training has an effect on problems associated with LBP.

Participants will:

  • Exercise three times per week for 8 weeks
  • Be assessed before, 4 weeks after, and 8 weeks after intervention

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel
Primary Purpose
Treatment
Masking
Triple (Participant, Care Provider, Outcomes Assessor)

Eligibility Criteria

Ages
40 Years to 60 Years (Adult)
Sex
Male
Accepts Healthy Volunteers
No

Inclusion Criteria

  • I. Males aged 40 to 60 years, II. nonsmokers, III. with normal body mass index IV. of Saudi nationality, V. office workers, VI. suffering from chronic NLBP for 12 weeks or more with a moderate disability according to the Oswestry Disability Index (score of 21 - 40%) moderate activity level according to the Arabic version of the International Physical Activity Questionnaire short form .

Exclusion Criteria

  • I. Previous spinal surgery, fracture, deformity, or disease. II. Neurological deficit and Lower limb deformity or fracture, or disease. III. Mental or psychological illness. The Arabic version of the Self-Reporting Questionnaire (SRQ-20) developed by the World Health Organization (WHO) to screen for common mental disorders such as depression and anxiety, uses a cut-off score to distinguish between individuals with and without significant psychological distress. A score of 7 or below is generally considered "normal", indicating no significant psychological distress (Al-Subaie et al., 1998).
  • IV. Systematic chronic illnesses such as hypertension, cardiac and respiratory disorders, and diabetes mellitus.

Arms & Interventions

Treatment Group III

Experimental

lumbar strengthening exercise and knee OKC and CKC exercise

Intervention: CKC and OKC Exercise (Other)

control group

Active Comparator

lumbar strengthening

Intervention: back strengthening exercise (Other)

Treatment Group I

Experimental

lumbar strengthening exercise and knee CKC exercise

Intervention: OKC Exercise (Other)

Treatment Group II

Experimental

lumbar strengthening exercise and knee CKC exercise

Intervention: CKC Exercise (Other)

Outcomes

Primary Outcomes

Mean change in the Lumbar lordosis Cobb angle in degrees measured by X-ray

Time Frame: 8 weeks

Secondary Outcomes

  • Mean change in the quality of Life score as measured by the Oswestry Disability Index(8 weeks)
  • Mean change of LBP intensity from the baseline measured by Numeric Pain Rating Scale(8 weeks)
  • Mean change in the muscle strength measured by the Hand-held dynamometer(8 weeks)
  • Mean change in the posture control measured by the stare exursion test(8 weeks)

Investigators

Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

ALHUMAYANI ABDULLAH FALEHA

Principal investigator

Lincoln University College

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