Relationship between the thoracolumbar flexion angle and pelvic posterior movement during trunk flexion.
Min-Hee Kim, Won-Gyu Yoo
PMID 29706700WHAT IT FOUND
In 15 subjects, larger thoracolumbar flexion angles were linked with less backward hip displacement during trunk flexion.
This describes movement, not a treatment effect.
Key findings
01The thoracolumbar flexion angle and hip posterior displacement were significantly correlated, and the correlation was negative (r = -0.81, p < 0.01).
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 15 subjects were studied, so the result may not apply to other groups. The paper does not state that the subjects had low back pain or any clinical condition. The study measured movement during a task, not a treatment effect or symptom outcome. The discussion includes ideas about abnormal stress and cumulative damage, but the study did not measure those outcomes. The paper does not report blinding of the video measurements or reliability of the measurements.
Declared interests
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (No. 2017R1D1A1B03035485). The authors declared no conflict of interest.
The easy way to misread this
Do not read the inverse relationship as proof that limited thoracolumbar flexion causes low back pain or that a treatment to increase it will help. The study measured 15 subjects during trunk flexion and did not test treatment or pain outcomes.