Abstract：
CONTEXT:A normal breathing pattern while performing the abdominal-hollowing (AH) maneuver or spinal-stabilization exercise is essential for the success of rehabilitation programs and exercises. In previous studies, subjects were given standardized instructions to control the influence of respiration during the AH maneuver. However, the effect of breathing pattern on abdominal-muscle thickness during the AH maneuver has not been investigated. OBJECTIVE:To compare abdominal-muscle thickness in subjects performing the AH maneuver under normal and abnormal breathing-pattern conditions and to investigate the effect of breathing pattern on the preferential contraction ratio (PCR) of the transverse abdominis. DESIGN:Comparative, repeated-measures experimental study. SETTING:University research laboratory. PARTICIPANTS:16 healthy subjects (8 male, 8 female) from a university population. MEASUREMENT:A real-time ultrasound scanner was used to measure abdominal-muscle thickness during normal and abnormal breathing patterns. A paired t test was used to assess the effect of breathing pattern on abdominal-muscle thickness and PCR. RESULTS:Muscle thickness in the transverse abdominis and internal oblique muscles was significantly greater under the normal breathing pattern than under the abnormal pattern (P < .05). The PCR of the transverse abdominis was significantly higher under the normal breathing pattern compared with the abnormal pattern (P < .05). CONCLUSION:The results indicate that a normal breathing pattern is essential for performance of an effective AH maneuver. Thus, clinicians should ensure that patients adopt a normal breathing pattern before performing the AH maneuver and monitor transverse abdominis activation during the maneuver.
journal_name
J Sport Rehabiljournal_title
Journal of sport rehabilitationauthors
Ha SM,Kwon OY,Kim SJ,Choung SDdoi
10.1123/jsr.2012-0059subject
Has Abstractpub_date
2014-02-01 00:00:00pages
12-7issue
1eissn
1056-6716issn
1543-3072pii
2012-0059journal_volume
23pub_type
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