For decades, the intervertebral disc (IVD) has been framed in clinical and research narratives as a structure that inevitably degrades, a biomechanical victim of ageing and axial stress.1 This portrayal, rooted in cautious orthopaedic tradition and a conservative interpretation of spinal loading, has often overshadowed what recent evidence increasingly suggests: the disc is not passive, nor is it irreversibly degenerative.2 Rather, it is a living, mechanoresponsive tissue capable of positive structural and metabolic adaptation. The implications of this shift are profound. If the disc is responsive to stress, then physical activity, long known to benefit musculoskeletal health, could be reframed not as a risk, but as a critical determinant of spinal resilience.
While this editorial focuses on the IVD, it does not seek to re-establish a purely biomechanical model of back pain. Rather, it complements the contemporary biopsychosocial framework by highlighting the disc’s capacity for adaptation as one biological dimension within a broader system of physical, psychological and social influences. Recognising this interplay allows clinicians to integrate movement-based interventions with education and behavioural strategies that respect the multifactorial nature of pain. We also argue that appropriate loading through regular physical activity represents a largely untapped intervention for maintaining and even improving disc health. This calls for a redefinition of our clinical language and therapeutic approaches to back pain and disc degeneration. The challenge is not to protect the disc from movement, but to relearn how to load it appropriately.
The biomechanics of motion: disc hydration, load and the forgotten physiology of movement
The IVD is among the few human tissues that lack a direct blood supply, relying heavily on dynamic mechanical loading to facilitate nutrient exchange.1 During physical activity, compression and decompression cycles promote the movement of water, oxygen and solutes into and out of the disc’s matrix, an essential process for cellular survival and extracellular matrix maintenance.3 Sedentary …
