Comparison of abdominal muscle thickness according to feedback method used during abdominal hollowing exercise.
Sangyong Lee, Seulki Han, Daehee Lee
PMID 27799683WHAT IT FOUND
During a 15-minute abdominal hollowing exercise, real-time ultrasound feedback showed greater transversus abdominis thickness than manual-contact basic training.
Pressure biofeedback did not differ from either method. These were 30 healthy students, not patients.
Key findings
01In all three groups, transversus abdominis thickness was greater during abdominal hollowing exercise than at rest, while internal and external oblique thickness did not differ compared with rest.
02During abdominal hollowing exercise, transversus abdominis thickness was greater in the real-time ultrasound group than in the basic training group.
03Pressure biofeedback did not differ from basic training or from real-time ultrasound feedback for transversus abdominis thickness during exercise.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 30 healthy young students in their twenties in a certain geographic area were studied, and the number of subjects was small. The outcome was abdominal muscle thickness during a 15-minute exercise session, not patient symptoms, function, or injury outcomes. The measurements were made after 15 minutes of training, not after a longer programme.
The easy way to misread this
Do not conclude that real-time ultrasound feedback is the best clinical way to train abdominal hollowing. The study measured muscle thickness in 30 healthy young students during a 15-minute exercise session, not symptoms or function, and pressure biofeedback did not differ from ultrasound feedback.