In movement, the lumbar spine should be kept what to support proper function?

• A. Should be kept stable for proper function
• B. Rotates during most movements
• C. Is typically the most mobile segment
• D. Needs to be highly flexible

Answer: (A)

The idea being tested is how the lumbar spine should function during movement. It should be kept stable to support proper function. The lower back serves as a foundation that transfers load between the upper body and the legs, so maintaining a stable lumbar region helps keep neutral alignment, protects the discs, and allows the hips and thoracic spine to move without the lower back taking excessive strain. In most functional patterns—like squats, hinges, and loaded carries—the goal is to brace the core and keep the lumbar area relatively still while the hips and thoracic spine move. Excess rotation or bending of the lower back increases shear forces and injury risk, and the lumbar spine is not the most mobile segment; the thoracic spine and hips provide more mobility. A little flexibility exists, but stability is the priority for proper function.