Influence of muscle activation of posterior oblique sling from changes in activation of gluteus maximus from exercise of prone hip extension of normal adult male and female.
Jae-Kwang Lee, Jong-Ha Hwang, Chan-Myeong Kim and 2 others
PMID 30858657WHAT IT FOUND
Adding hip abduction and knee flexion to prone hip extension increased gluteus maximus and opposite latissimus dorsi activation, while reducing hamstring activation, in healthy young adults.
Key findings
01Prone hip extension with hip abduction and knee flexion produced higher activation than ordinary prone hip extension in contralateral latissimus dorsi, ipsilateral erector spinae, and ipsilateral gluteus maximus.
02Ordinary prone hip extension produced higher hamstring activation than the abducted, knee-flexed version.
03Contralateral erector spinae did not show a significant activation difference between the exercises.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
26 healthy young adults were studied, so the findings may not apply to patients with back pain. The angle of the pelvis and waist was not measured, so the effect on lumbar and pelvic movement was not assessed. The speed of hip extension was not controlled. Only open-chain prone exercises were tested, so standing or walking may produce different activation. Only the right dominant leg was tested.
Declared interests
The authors declared no conflict of interest.
The easy way to misread this
Do not treat this as evidence that prone hip extension with abduction and knee flexion reduces back pain or improves function. The study measured muscle activation only in 26 healthy young adults, and it did not follow patients with back pain over time.