Anterior Chain Dominance

Cervical/Thoracic - Global Pattern

Anterior chain dominance describes a biased movement strategy where the anterior tissues and anteriorly oriented motor patterns (hip flexors, quads, pecs/upper traps, lumbar extensors via rib flare) disproportionately drive posture and movement. It commonly presents as rib flare, increased lumbar extension tendency, forward head/rounded shoulder stack, quad-dominant squatting, and difficulty recruiting posterior chain strategies (glutes/hamstrings/scapular retractors) under load.

Biomechanical Mechanism

Mechanism is a coordination bias: the system seeks stability by extending/arching and pulling from the front, often paired with limited posterior chain contribution and/or limited hip hinge strategy. Contributing factors may include prolonged sitting, high-volume anterior training, breathing strategy with poor abdominal wall engagement, and persistent APT tendency. This pattern overlaps with (but is not identical to) upper/lower crossed syndromes; it is intentionally broader and should be used when the dominant theme is 'front-side takeover' across regions.

Clinical Rationale

Using this as a 'global strategy' pattern helps the app avoid over-fragmenting into many regional labels when the consistent theme is an anteriorly biased motor solution. The goal is not to demonize the anterior chain, but to restore balanced options and reduce compensatory extension/rib flare strategies that can increase irritability in some users.

Practical Solution

Intervention focus: restore posterior chain options + improve stack. 1) Stack & breathing drills to reduce rib flare 2) Hip hinge re-education (posterior chain entry) 3) Posterior chain strengthening (glute/hamstring, upper back) 4) Integrate into compound patterns (hinge/squat/press) with constraints Frequency: 2–4x/week depending on training status; prioritize low-fatigue skill exposure early.

Common Compensations

• Rib flare and lumbar extension during overhead motion
• Quad dominance in squats/lunges (early knee travel, reduced hip contribution)
• Hip hinge substituted by lumbar extension
• Upper trap/pec dominance with reduced scapular posterior tilt/retraction
• Neck extension / chin poke as a stacking strategy

Progression

1. Breathing/stack drills + posterior pelvic awareness
2. Hinge constraints (wall hinge, dowel hinge)
3. Posterior chain strength (glute bridge, RDL patterns, rows)
4. Anti-extension core integration
5. Full patterns with load + tempo control

Regression

• Reduce overhead range and load
• Use external constraints (wall, bench, dowel)
• Shorten lever arms (bent-knee variants)
• Decrease ROM until stack is maintained
• Lower fatigue (fewer reps, longer rest)

Red Flags

• Significant pain provocation with extension that escalates over sessions
• Unexplained weight loss / fever or systemic red flags
• Progressive neurologic symptoms
• Severe shoulder pain with overhead motion (suspected acute injury)

Differential Diagnosis

• True hip flexion restriction (FADIR positive) driving lumbar extension strategy
• Thoracic extension restriction leading to lumbar substitution
• Shoulder flexion limitation from capsular tightness vs motor strategy
• Acute low back pain with extension intolerance
• Structural scoliosis or fixed deformity

Related Patterns

• upper crossed syndrome
• lower crossed syndrome
• anterior pelvic tilt
• forward head posture
• thoracic kyphosis

Related Exercises

• hip flexor contract relax
• glute bridge
• dead bug
• pallof press
• squat to box
• ball wall push hip hinge

Related Assessments

• overhead squat assessment
• lumbar lordosis assessment
• push up assessment

Evidence