Loads in the lumbar spine during traction therapy

Area of Science:

• Biomechanics
• Spinal Manipulation
• Physical Therapy

Background:

• Traction therapy is a common treatment for low back pain.
• The Fowler's position is often used to enhance traction effectiveness.
• Understanding the spinal loads during traction is crucial for therapeutic application.

Purpose of the Study:

• To determine the loads on the lumbar spine during traction therapy in the Fowler's position.
• To analyze the biomechanical effects of traction in this specific position.
• To compare traction with postero-anterior mobilization.

Main Methods:

• Theoretical analysis of spinal loads during traction.
• Experimental measurement of flexion moments in Fowler's position.
• Comparison of mechanical effects with postero-anterior mobilization.

Main Results:

• Traction in Fowler's position generates both axial distraction and a flexion moment on the lumbar spine.
• Fowler's position pre-flexes the spine, increasing posterior tissue stretch.
• The angle of pull and friction can influence loads, but a split traction table mitigates this.

Conclusions:

• Traction in Fowler's position effectively stretches posterior spinal tissues through combined axial tension and flexion.
• Therapists should consider the segmental load variations when selecting treatments for low back pain.
• The biomechanical principles of traction and mobilization inform clinical decision-making.