Effects of prone trunk extension exercise using different fixations and with and without abdominal drawing-in maneuver in healthy individuals.
Yong-Wook Kim
PMID 28533589WHAT IT FOUND
In healthy men doing prone trunk extension, adding thoracolumbar fixation and abdominal drawing-in raised upper-back extensor activity and reduced lower-back extensor activity compared with pelvic fixation.
No patient outcomes were tested.
Key findings
01With thoracolumbar fixation plus abdominal drawing-in, thoracic extensor muscle activity was 2.87 ± 1.36 mV, significantly higher than 2.46 ± 0.90 mV with pelvic fixation alone and 2.41 ± 0.90 mV with pelvic fixation plus abdominal drawing-in.
02With thoracolumbar fixation plus abdominal drawing-in, lumbar extensor muscle activity was 1.72 ± 1.02 mV, significantly lower than 1.93 ± 1.16 mV with pelvic fixation alone.
03With pelvic fixation plus abdominal drawing-in, lumbar extensor muscle activity was 1.73 ± 1.01 mV, significantly lower than 1.93 ± 1.16 mV with pelvic fixation alone.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
All participants were healthy young men, so the results may not apply to women or people with back pain, kyphosis, or lordosis. The speed of trunk extension was not controlled for each participant, which can affect muscle activity readings. Surface EMG can include signals from adjacent muscles. The outcomes were immediate muscle activity measurements, not patient symptoms or function.
The easy way to misread this
Do not conclude that this exercise improves back pain, kyphosis, or lordosis. The study measured muscle activity in healthy men and did not test clinical outcomes.