Relationship of the mobility of the sacroiliac joint with foot plant pressure.
Rebeka Boaventura Guimarães, Cesario Rui Callou Filho, Alex Rey Norberto and 3 others
PMID 34177106WHAT IT FOUND
In young, pain-free adults, standing balance shifted forward when sacroiliac mobility tests were positive.
However, actual pressure on the foot soles did not change with these tests. A forward shift in standing balance alone does not confirm altered foot loading.
Key findings
01The location of the static center of gravity was associated with results from the Standing Flexion, Gillet, and Downing tests.
02There was no statistical difference between left and right foot variables for total mean pressure, maximum average pressure, or contact surface area.
03The study did not identify an association between plantar pressure domains, contact area, or the dynamic center of gravity and the sacroiliac mobility tests.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The participants were young, university students (mean age 22.1 years) and explicitly pain-free, so findings may not apply to older adults or patients with existing low back or pelvic pain. The study was cross-sectional, so it cannot determine if sacroiliac mobility issues cause the balance shifts or if they are just correlated. Physical tests for sacroiliac mobility (like the Gillet and Standing Flexion tests) are subjective and rely on the examiner's palpation skills, which can vary. Baropodometry data can be influenced by device calibration and sensor technology, which may affect reliability.
Declared interests
The authors declared no conflict of interest and no financial support.
The easy way to misread this
Do not assume that a positive sacroiliac mobility test indicates abnormal foot pressure. The study found that while standing balance shifted, the actual pressure on the foot soles did not differ significantly between those with positive and negative test results.