NCT07337213

Effect of Knee Extensor Training on the Lumbar Spine

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

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 128 (estimated)
• Sponsor: Lincoln University College · Academic / Other
• Sex: Male
• Age: 40 Years – 60 Years
• Healthy volunteers: Not accepted

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

Conditions

• Non Specific Low Back Pain

Interventions

Type	Name	Description
OTHER	back strengthening exercise	strengthening exercise to lumbar extensors
OTHER	OKC Exercise	knee extensor OKC exercise added to the lumbar strengthening exercise
OTHER	CKC Exercise	knee extensor CKC exercise added to the lumbar strengthening exercise
OTHER	CKC and OKC Exercise	knee extensor OKC and CKC exercise added to the lumbar strengthening exercise

Timeline

• Start date: 2026-02-01
• Primary completion: 2026-04-01
• Completion: 2026-06-01
• First posted: 2026-01-13
• Last updated: 2026-01-13