Strength Isometric Test: Spine - Lateral Flexion

Spine lateral flexion refers to the bending of the spine sideways, either to the left or right, primarily engaging the muscles along the side of the torso. Performing this movement helps enhance flexibility and strength in the muscles supporting the spine.

Here's how to perform spine lateral flexion:

1. Stand or Sit Tall: Begin in a standing or seated position with an upright posture, keeping your shoulders relaxed.

2. Side Bend: Gently and slowly bend your upper body to one side, aiming to keep your spine elongated and avoiding twisting or rotating. You can use your hand to reach toward the knee or shin on the side you're bending towards.

3. Return to Neutral: Slowly return to the upright position, then repeat the movement on the opposite side.

4. Repetitions: Perform several repetitions on each side, focusing on smooth and controlled movements.

This exercise helps improve flexibility and mobility in the spine, targeting the oblique muscles, and promoting overall spinal health. Always perform this movement within a comfortable range of motion, avoiding any sudden or jerky movements that could strain the muscles or spine.

Normative data specifically for spine lateral flexion exercises might not be as widely established or standardized compared to more common fitness assessments. The range of motion in lateral flexion can vary significantly among individuals based on factors like age, flexibility, and musculoskeletal conditions.

References:

• Mellin, Guy P. "Accuracy of measuring lateral flexion of the spine with a tape." Clinical Biomechanics 1.2 (1986): 85-89.3.
• Dimnet, J., et al. "Radiographic studies of lateral flexion in the lumbar spine." Journal of biomechanics 11.3 (1978): 143-150.
• Fazey, Peter J., Hiroshi Takasaki, and Kevin P. Singer. "Nucleus pulposus deformation in response to lumbar spine lateral flexion: an in vivo MRI investigation." European Spine Journal 19 (2010): 1115-1120.