The pelvic ring provides attachment and transfers force between trunk and lower limbs.
ZONE 3 · REGION 01Pelvis
Pelvis
& SI Region
Pelvis transfers load between trunk and lower limbs. The sacroiliac region is part of this system, but visual asymmetry or tenderness alone cannot tell us that an SI joint is displaced.
REGIONAL OUTCOMESOrient pelvis & sacrum anatomyAssess weight-transfer tasksAvoid alignment-based overdiagnosisRecognise pelvic-region red flags
SISIPELVIS · SACRUM · LOAD TRANSFER
A bridge between trunk and legs.
The sacrum sits between the pelvic bones and connects the spine to the pelvis.
Sacroiliac joints contribute to load transfer with relatively small movement compared with the hip.
Trunk, gluteal and hip muscles contribute to control during standing, walking and loaded tasks.
Assess what the pelvis does during function.
Accept and distribute body weight.
Transfer load from one limb to the other.
Coordinate trunk, pelvis and hip during ascent/descent.
Challenge balance and load transfer through one side.
ASYMMETRY ≠ SI DISPLACEMENT
Pelvic landmarks boleh nampak berbeza antara kiri dan kanan. Observation itu boleh direkod, tetapi jangan terus conclude “pelvis senget” ialah punca symptom atau joint perlu dipaksa masuk tempat.
Use symptoms + movement + load + function.
INTERVIEWonset · trauma · pregnancy/postpartum context · neuro/systemic
→MOVEtrunk · hip · transitions
→LOADstand · step · single-leg if safe
→COMPAREtolerance · control · familiar symptom
→SCREENtreat · modify · refer
OBJECTIVE LANGUAGE
“SI joint kanan lari.”
Better: “Right single-leg loading reproduces the familiar posterior pelvic symptom and shows reduced tolerance compared with left; safety screen is clear.”
Example objective: improve comfortable right-side weight transfer.
Comfortable trunk/hip movement and supported loading.
Use relevant hip/trunk movement where limitation contributes to the task.
Optional trained input for comfort/movement; do not claim to reposition the SI joint.
Progress bilateral to asymmetric and single-leg tasks according to tolerance.
2-LEG SUPPORT→WEIGHT SHIFT→STEP→SINGLE LEG→FUNCTION
Retest the same load-transfer task.
Symptom response, control, confidence and tolerance.
Better, same or worse? Progress from the response, not from pelvic appearance.
Defer routine treatment and seek appropriate medical assessment for major trauma, inability to weight-bear after injury, severe or rapidly worsening unexplained pelvic/back pain, fever/systemic illness, significant neurological weakness or sensory change, new bladder/bowel disturbance or saddle/perineal sensory change, concerning abdominal/pelvic symptoms, or pregnancy/postpartum symptoms requiring medical evaluation. Emergency-pattern symptoms require urgent help.