What is the most risky deviation from neutral spine during movement?

The most risky deviation from neutral spine during movement is a loss of neutral spine. Maintaining a neutral spine is crucial for optimal biomechanics, as it provides the necessary alignment for support and stability during physical activities. When the spine loses its neutral position, this can lead to improper loading of the vertebrae and surrounding structures, increasing the risk of injury.

Flexion, extension, and hip rotation can also pose risks, but they can occur within safe limits if performed properly. However, a complete loss of neutral spine directly undermines the protective mechanisms afforded by the spine's natural curves and alignment. This deviation disrupts the natural ability to distribute forces evenly throughout the body and can lead to excessive stress on the surrounding muscles, ligaments, and discs, which may result in injuries such as herniated discs or muscle strains.