Modern medicine explains the observations recorded in the Donguibogam through clear physiological mechanisms. The pathways linking obesity to back pain extend well beyond simple compressive load, involving complex systemic interactions.
First, mechanical stress increases significantly. Abdominal obesity shifts the center of gravity forward. This accentuates the natural curve of the lumbar vertebrae, leading to hyperlordosis. As lumbar lordosis deepens, excessive strain falls on the stabilizing muscles, spinal ligaments, and intervertebral discs designed to cushion movement. Persistent pressure increases the risk of disc degeneration or injury while overloading the facet joints, which can accelerate arthritis. Meanwhile, weakened abdominal muscles and chronically tight lower back muscles create a muscular imbalance across the core, compromising spinal stability and allowing pain to become chronic.
Second, obesity triggers a chronic inflammatory response. Visceral fat is far from inert storage tissue; it functions like an active endocrine organ, secreting pro-inflammatory cytokines such as TNF-Ξ± and IL-6. Entering systemic circulation, these compounds sustain low-grade chronic inflammation throughout the body. Around the lower back, this persistent inflammatory state sensitizes nociceptors and prolongs local tissue irritation. Consequently, obesity can induce or aggravate lumbar pain via biochemical inflammation, even in the absence of acute structural disc or joint damage.
Third, obesity correlates closely with metabolic syndrome and endocrine dysfunction. It serves as a major driver of insulin resistance, dyslipidemia, and hypertension. These metabolic disorders impair peripheral circulation and damage microvascular blood vessel walls. Because spinal structures depend on microvessels for oxygen and nutrition, compromised blood flow deprives discs and ligaments of vital nutrients, speeding degenerative changes. Concurrently, hormonal imbalances can diminish bone mineral density and disrupt cartilage metabolism, further worsening low back pain.
Fourth, the nervous system is affected. Sustained inflammation and metabolic disturbances impact both peripheral nerves and the central nervous system. They can produce nerve injury or neuropathic pain and may induce central sensitization, an alteration in central pain processing that lowers pain thresholds. In this state, the brain amplifies and interprets pain signals with heightened intensity.
Finally, psychosocial factors play a significant role. Functional limitations and social stigma related to body weight frequently contribute to depressive mood or anxiety. This psychological strain lowers pain thresholds, causing discomfort to register more intensely. Mental and emotional stress directly shapes how back pain is experienced.
Obesity is therefore a multifaceted issue that influences the lumbar spine through mechanical, inflammatory, metabolic, neural, and psychological pathways. Effectively relieving obesity-induced low back pain requires restoring overall systemic balance alongside weight management.
