Low Back Pain: When the Body Moves Away From Center

For many people, lower back pain may be less about a “bad back” and more about a body that has moved away from its center. The human body is constantly managing its center of mass—the point around which our mass is distributed and balanced. In an upright standing position, the center of mass typically resides slightly anterior to the L4/L5 region of the lumbar spine. Interestingly, this is also one of the most common regions where people experience persistent low back discomfort. When the center of mass shifts farther away from its optimal position, the body must create muscular and fascial strategies to keep us upright. Over time, those strategies can increase mechanical demand on the tissues surrounding the lumbar spine.

But why does the body move away from center in the first place? One possibility is that the nervous system is responding to a perceived threat. The nervous system’s primary objective isn’t perfect posture, symmetry, or athletic performance—it is survival. When the brain interprets something in the environment or within the body as threatening, it may alter movement, posture, muscle tone, breathing, and weight distribution in an attempt to protect us. The important point is that the threat doesn’t necessarily have to be occurring right now. A previous injury, painful experience, stressful event, or persistent environmental demand can influence how the nervous system organizes movement long after the original event has passed.

From an evolutionary perspective, we can simplify many survival challenges into two fundamental concerns: energy conservation and avoiding predators. If food is scarce, conserving energy becomes critical. The body benefits from reducing unnecessary movement and expenditure. Conversely, when the threat is being eaten, movement becomes essential. We need to be able to flee, fight, climb, react, and change direction. These two competing demands—conservation and movement—have shaped the nervous system’s ability to constantly assess whether it is safe to relax or whether it needs to prepare for action.

This gives us a different way of looking at low back pain. Rather than simply asking, “What is wrong with the lumbar spine?” we might ask, “Why has the nervous system decided that this is the safest position for the body right now?” A person who habitually shifts their center of mass may not be demonstrating a structural failure; they may be demonstrating a successful adaptation to a perceived threat. The position may actually be the nervous system’s best available solution for maintaining stability and safety. The problem arises when that strategy becomes unnecessary, excessive, or unable to adapt.

Perhaps the goal of corrective exercise, rehabilitation, and performance training shouldn’t simply be to force the body into an ideal alignment. Instead, we should create an environment in which the nervous system feels sufficiently safe to return to center. By restoring options for movement, improving sensory input, developing strength and mobility, and gradually exposing the individual to meaningful movement, we can give the nervous system more choices. When the body no longer needs to protect itself by constantly moving away from center, it may be able to find a more efficient, adaptable, and comfortable position on its own.