Myofascial Slings

Written by Dr Steven Hewitt — Chiropractor · AHPRA: CHI0001115420 · Last reviewed: May 2026

The concept of myofascial slings describes integrated chains of muscle and connective tissue that work together to transmit force across the body during movement. Rather than viewing muscles as isolated actuators — each contracting to produce a single movement at a single joint — the sling model recognises that force is transmitted longitudinally and obliquely through fascial connections between muscles, and that these connections are anatomically confirmed and biomechanically significant.

The clinical implication is direct: when a structure at one point in a sling is dysfunctional, the load it can no longer manage is redistributed to adjacent structures — including structures at a considerable distance from the pain site. Lower back pain is not simply a lumbar spine problem. Proximal hamstring pain is not simply a hamstring problem. Lateral knee pain is not simply an iliotibial band problem. Each of these presentations involves a sling, and addressing only the symptomatic structure, while the rest of the chain is unassessed, is a common reason why the same pain recurs after treatment.

Fascia as the Medium

The force transmission that makes slings functionally coherent is mediated by fascia — the continuous connective tissue network that surrounds, invests, and connects every muscle in the body. The thoracolumbar fascia is the central hub of the posterior sling system: anatomically, it connects the gluteus maximus and contralateral latissimus dorsi across the midline, and connects the erector spinae and multifidus to the sacrotuberous ligament below. [1] The biceps femoris long head has been shown to be histologically continuous with the sacrotuberous ligament — confirming that the force transmission pathway from foot to lumbar spine through the deep longitudinal sling is not a mechanical model, but an anatomical one. [2]

Fascial force transmission has been quantified in cadaveric and in vivo studies: tension applied at one end of a myofascial chain produces measurable displacement at the other end, even when the joints between them are held still. [3] This means that fascial stiffness or restriction at any point in a chain alters the mechanical behaviour of every other structure connected to it — creating the pattern of widespread tension and recurrent injury that many people with persistent musculoskeletal pain will recognise.

How We Use the Sling Model

In clinical practice, the sling model informs both assessment and treatment. When a patient presents with recurrent lower back pain, we assess not just the lumbar spine but the deep longitudinal and posterior oblique slings that transmit load into it — including the hamstrings, the gluteus maximus, the thoracolumbar fascia, and the posterior shoulder chain. When a patient has persistent lateral knee pain, we assess the posterior oblique and lateral stability systems that govern pelvis and hip mechanics in walking and running.

Treatment is directed at the densifications and load deficits across the relevant sling, not just at the pain site. This approach — identifying and treating the cause of load concentration, rather than the site of load expression — is the distinguishing feature of the fascial model in practice. Each sling article below explains the anatomy, the clinical logic, and the conditions most commonly associated with that sling's dysfunction.

The Slings and the Conditions They Connect

The four slings each connect to specific clinical presentations across the musculoskeletal system:

The deep longitudinal sling is most relevant to plantar fasciopathy, proximal hamstring tendinopathy, sacroiliac joint dysfunction, and recurrent lower back pain in people who also have restricted ankle dorsiflexion or poor posterior chain strength. → Deep Longitudinal Sling

The posterior oblique sling is central to sacroiliac joint loading, gluteal tendinopathy, rotator cuff presentations with a thoracolumbar component, and the persistent lower back tension that comes with poor gluteus maximus activation during hip extension. → Posterior Oblique Sling

The anterior oblique sling is most relevant to groin pain, adductor tendinopathy, recurrent lateral ankle sprain (where trunk rotation mechanics contribute), and anterior pelvic pain presentations where the hip flexor-trunk rotation interface is involved. → Anterior Oblique Sling

The lateral stability sling — a neuromuscular co-activation system rather than an anatomical fascial chain — governs pelvic stability in single-leg stance. It is relevant to lateral hip pain, ITB syndrome, patellofemoral pain, and lower back pain that is worse in single-leg loading activities such as walking, stair climbing, and running. → Lateral Stability Sling

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