Effect of abdominal drawing-in maneuver with prone hip extension on muscle activation of posterior oblique sling in normal adults.
Jae-Kwang Lee, Jin-Hwan Lee, Kwang-Su Kim and 1 others
PMID 32581433WHAT IT FOUND
In healthy adults, adding abdominal drawing-in to prone hip extension increased gluteus maximus and opposite latissimus dorsi activity and reduced erector spinae and biceps femoris activity.
This is muscle activation, not proven pain reduction.
Key findings
01Compared with prone hip extension alone, adding abdominal drawing-in increased contralateral latissimus dorsi activity from 16.74% to 21.74% of maximal isometric contraction and ipsilateral gluteus maximus activity from 20.01% to 31.31% (p<0.05).
02Adding abdominal drawing-in decreased ipsilateral erector spinae activity from 7.94% to 5.91% of maximal isometric contraction and ipsilateral biceps femoris activity from 50.43% to 21.78% (p<0.05).
03The study examined only muscle activation in 20 healthy right-leg-dominant adults, not patients with back pain or joint pain.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study used 20 healthy adults, so it does not show what happens in patients with back pain or joint pain. The paper states that no research was conducted on the continuation of the effects. The paper examined only back muscle sling activity through abdominal drawing-in contraction. Only participants with a dominant right leg were included. The outcome measured was muscle activation during the exercise.
Declared interests
The authors declared no conflict of interest.
The easy way to misread this
Do not conclude that adding abdominal drawing-in to prone hip extension reduces back pain or improves function. The study included 20 healthy adults and measured only back muscle sling activity through abdominal drawing-in contraction.