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  • Sonographic evaluation of diaphragmatic function during breathing control

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    Author(s)
    Jones, AYM
    Ngai, SPC
    Ying, MTC
    Morris, NR
    Laakso, EL
    Lee, SWY
    Parry, SM
    Griffith University Author(s)
    Morris, Norman
    Laakso, Liisa
    Year published
    2017
    Metadata
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    Abstract
    Objective: To investigate the effect of “breathing control” on sonographic diaphragmatic excursion. Method: A prospective, randomized, assessor-blinded study design involving 20 physiotherapy students; ten with knowledge of the breathing control technique (Group BC) and ten without (Group CON). All participants were asked to perform a Chester step test. Group BC performed BC, while Group CON adopted their own breathing pattern during recovery after the step test. Respiratory rate and sonographic parameters of the diaphragm including diaphragmatic excursion, speed of diaphragmatic contraction (slope of contraction), and ...
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    Objective: To investigate the effect of “breathing control” on sonographic diaphragmatic excursion. Method: A prospective, randomized, assessor-blinded study design involving 20 physiotherapy students; ten with knowledge of the breathing control technique (Group BC) and ten without (Group CON). All participants were asked to perform a Chester step test. Group BC performed BC, while Group CON adopted their own breathing pattern during recovery after the step test. Respiratory rate and sonographic parameters of the diaphragm including diaphragmatic excursion, speed of diaphragmatic contraction (slope of contraction), and inspiratory time were recorded before and after the step test. Results: All baseline data were similar for both groups except age. Respiratory rate at 1 min post-step test was higher in Group CON (24.6±4.9 bpm) compared to Group BC (15.6 ± 3.8 bpm) (p < 0.001). Post-step test sonographic evaluation demonstrated an increase in diaphragmatic excursion with a significant time and group interaction (F(4,72) = 5.499, p = 0.005). Post hoc analysis revealed that the diaphragmatic excursion was significantly higher in Group BC compared to Group CON at first, second and third minute post-step test. Time and group interactions were not significant in inspiration time (F(4,72) = 2.459, p = 0.082) nor the slope of contraction (F(4,72) = 0.655, p = 0.582)]. Conclusion: Post-exercise diaphragmatic excursion was higher in participants applying BC. Non-invasive ultrasonography is able to promote objective evaluation of the relationship between breathing techniques and diaphragmatic function.
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    Journal Title
    Physiotherapy Theory and Practice
    Volume
    33
    Issue
    7
    DOI
    https://doi.org/10.1080/09593985.2017.1323363
    Copyright Statement
    © 2017 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Physiotherapy Theory and Practice on 25 May 2017, available online: 10.1080/09593985.2017.1323363.
    Subject
    Human Movement and Sports Science not elsewhere classified
    Clinical Sciences
    Human Movement and Sports Sciences
    Publication URI
    http://hdl.handle.net/10072/345137
    Collection
    • Journal articles

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