Comparing Passive-Active and Passive Hamstring Stretching for Improving Flexibility in Adults with Chronic Low Back Pain

What this Trial Is About

Researchers are studying a new method to improve hamstring flexibility in adults with chronic low back pain CLBP. The study compares a combination of passive and active hamstring stretching PAS to passive stretching PS alone. The goal is to see if PAS leads to better active flexibility, as well as improvements in passive flexibility, hamstring stiffness, and pelvic tilt. This research aims to enhance rehabilitation approaches for people with CLBP. Participants are randomly assigned to one of two groups. The control group performs three one-minute passive hamstring stretches per leg with rest intervals. The experimental group receives passive stretching followed by active exercises including Active Knee Extension, One-Leg Deadlift, and Bear-Squat, each with specific repetitions and holds. Both groups spend about 15 to 20 minutes per session. Measurements are taken before and immediately after the intervention. During the study, participants will undergo tests measuring active knee extension, fingertip-to-floor distance, straight leg raise angle, hamstring stiffness, pelvic tilt, and pain levels. They will also answer questions about perceived changes in flexibility. Additional assessments include kinesiophobia and movement harmfulness perception at baseline, and skin conductance during evaluation. The study starts in September 2025, and outcomes will help develop better rehabilitation programs for CLBP patients.

Comparison of the Immediate Effect of Passive vs. Passive-Active Hamstring Stretching on Flexibility in Patients With Chronic Low Back Pain